Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology
LLC in the United States and/or other countries. Cheetah, SeaTools and SeaTDD are either trademarks
or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United
States and/or other countries. All other trademarks or registered trademarks are the property of their
respective owners. No part of this publication may be reproduced in any form without the written per
mission of Seagate Technology LLC.
When referring to hard drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte,
or TB, equals one trillion bytes. Your computer's operating system may use a different standard of
measurement and report a lower capacity. In addition, some of the listed capaci ty is used for fo rmatting
and other functions, and thus will not be available for data storage. Seagate reserves the right to
change, without notice, product offerings or specifications.
This manual describes Seagate Technology® LLC, Cheetah® NS 10K.2 SAS (Serial Attached SCSI) disk
drives.
Cheetah drives support the SAS Protocol specifications to the extent described in this manual. The SAS Inter-face Manual (part number 100293071) describes the general SAS characteristics of Cheetah
and other Seagate SAS drives.
®
NS 10K.2 SAS
Cheetah NS 10K.2 SAS Product Manual, Rev. C1
2.0Sta ndards, compliance and reference documents
The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends on its host equipment to provide adequate power and environment for optimum performance
and compliance with applicable industry and governmental regulations. Special attention must be given in the
areas of safety, power distribution, shielding, audible noise control, and temperature regulation. In particular,
the drive must be securely mounted to guarantee the specified performance characteristics. Mounting by bottom holes must meet the requirements of Section 8.3.
2.1Standards
The Cheetah NS SAS family complies with Seagate standards as noted in the appropriate sections of this
manual and the Seagate SAS Interface Manual, part number 100293071.
The Cheetah disk drive is a UL recognized component per UL 60950-1, CSA certified to CSA 60950-1, and
VDE or TUV certified to EN 60950-1.
2.1.1Electromagnetic compatibility
The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to
use. The drive is supplied as a subasse mbly and is not s ubject to Subpart B of Pa rt 15 of the FCC R ules and
Regulations nor the Radio Interference Reg ula tio ns of the Canadian Department of Communications.
The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides
reasonable shielding. The drive is capable of meeting the Class B limits of the FCC Rules and Regulations of
the Canadian Department of Communications when properly packaged; however, it is the user’s responsibility
to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cables may be
required if the enclosure does n ot provide adequat e shielding. If the I/ O cables are external to the enclosure,
shielded cables should be used, with the shields grounded to the enclosure and to the host controller.
2.1.1.1Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is
the responsibility of those integrating the drive within their systems to perform those tests required and design
their system to ensure that equipment operating in the same system as the drive or external to the system
does not adversely affect the performance of the drive. See Table 12 for DC power requirements.
2Cheetah NS 10K.2 SAS Product Manual, Rev. C
2.2Compliance
2.2.1Electromagnetic compliance
Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking
and C-Tick Marking. The drive was teste d in a repr esent ative system for typical applications. The selected system represents the most popular characteristics for test platforms. The system configurations include:
• Typical current use microprocessor
• 3.5-inch floppy disk drive
• Keyboard
• Monitor/display
• Printer
• External modem
•Mouse
Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee
that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance
and provide the appropriate marking for their product.
Electromagnetic compliance for the European Union
If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic
Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and
Directive 93/68/EEC of 22 July 1993.
Australian C-Tick
If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995
and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Management Agency (SMA).
Korean MIC
If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with p aragr aph
1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the Electromagnetic
Compatibility Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information and
Communication Republic of Korea.
Taiwanese BSMI
If this model has two Chinese words meaning “EMC certification” followed by an eight digit identification number, as a Marking, it complies with Chinese National Standard (CNS) 13438 and meets the Electromagnetic
Compatibility (EMC) Framework requirements of the Taiwanese Bureau of Standards, Metrology, and Inspection (BSMI).
Cheetah NS 10K.2 SAS Product Manual, Rev. C3
2.3Reference documents
SCSI Commands Reference ManualSeagate part number: 100293068
SAS Interface ManualSeagate part number: 100293071
Applicable ANSI SAS documents
SFF-83233.5” Drive Form Factor with Serial Connector
SFF-8460HSS Backplane Design Guidelines
SFF-8470Multi Lane Copper Connector
SFF-8482SAS Plug Connector
ANSI INCITS.xxx Serial Attached SCSI (SAS) Standard (T10/1562-D)
ISO/IEC 14776-xxxSCSI Architecture Model-3 (SAM-3) Standard (T10/1561-D)
ISO/IEC 14776-xxxSCSI Primary Commands-3 (SPC-3) Standard (T10/1416-D)
ISO/IEC 14776-xxxSCSI Block Commands-2 (SBC-2) Standard (T10/1417-D)
ANSI Small Computer System Interface (SCSI) Documents X3.270-1996(SCSI-3) Architecture Model
Specification for Acoustic Test Requirement and ProceduresSeagate part number: 30553-001
Package Test SpecificationSeagate P/N 30190-001 (under 100 lb.)
Package Test SpecificationSeagate P/N 30191-001 (over 100 lb.)
In case of conflict between this document and any referenced document, this document takes precedence.
4Cheetah NS 10K.2 SAS Product Manual, Rev. C
3.0General description
Cheetah® NS 10K.2 SAS drives provide high performance, high capacity data storage for a variety of systems
including engineering workstations, network servers, mainframes, and supercomputers. The Serial Attached
SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility
and high-density storage requirements.
Cheetah drives are random access storage devices designed to support the Serial Attached SCSI Protocol as
described in the ANSI specifications, this document, and the SAS Interface Manual (part number 100293071)
which describes the general interface characteristics of this drive. Cheetah drives are classified as intelligent
peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 standard. The SAS connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future users the choice of
populating their systems with either SAS or SATA hard disk drives. This allows you to continue to leverage your
existing investment in SCSI while gaining a 3Gb/s serial data transfer rate.
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a nonreplaceable filter to maintain a contamination-free HDA environment.
Note.Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads,
media, actuator, etc.) as this requires special facilities. The drive does not contain user-replaceable
parts. Opening the HDA for any reason voids your warranty.
Cheetah drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of
destroying or degrading data by landin g in the dat a zone. The heads automatically go to the landing zone when
power is removed from the drive.
An automatic shipping lock prevents potential damage to the heads and disks that results from movement during shipping and handling. The shipping lock disengages and the head load process begins when power is
applied to the drive.
The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm
design that provides excellent performance with minimal power dissipation.
Cheetah NS 10K.2 SAS Product Manual, Rev. C5
3.1Standard features
Cheetah NS SAS drives have the following standard features:
• User-selectable logical block size (512, 520, 524, or 528 bytes per logical block)
• Programmable logical block reallocation scheme
• Flawed logical block reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (Post Format)
• ECC maximum burst correction length of 400 bits
• No preventive maintenance or adjustments required
• Dedicated head landing zone
• Embedded servo design
• Automatic shipping lock
• Self diagnostics performed when power is applied to the drive
• Zone bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 16 MB data buffer (see Section 4.5).
• Drive Self Test (DST)
• Background Media Scan (BGMS)
•Power Save
3.2Media description
The media used on the drive has an aluminum substrate coated with a thin film magnetic material, ov e rcoa t ed
with a proprietary protective layer for improved durability and environmental protection.
3.3Performance
• Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system
performance.
• 600 MB/sec maximum instantaneous data transfers.
• 10K RPM spindle. Average latency = 2.98 ms
• Command queuing of up to 128 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
• Mean Time Between Failures (MTBF) of 1,600,000 hours
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• 5-year warranty
6Cheetah NS 10K.2 SAS Product Manual, Rev. C
3.5Formatted capacities
Standard OEM models are formatted to 512 bytes per block. The block size is selectable at format time and
must be a multiple of 4 bytes. Users having the necessary equipment may modify the data block size before
issuing a format command and obtain different formatted capacities than those listed.
To provide a stable target capacity environment and at the same time provide users with flexibility if they
choose, Seagate recommends product planning in one of two modes:
1. Seagate designs specify capacity poin ts at certain blo
products will meet. We recommend customers use this capacity in their project planning, as it ensures a
stable operating point with backward and forward compatibility from generation to generation. The current
guaranteed operating points for this product are:
ST3600002SSST3450802SS
ck sizes that Seagate guarantees current and future
Sector Size
DecimalDecimal
5121,172,123,568879,097,968
5201,147,307,694860,480,771
5241,132,015,600849,011,700
5281,115,749,556836,812,167
2. Seagate drives also may be use d at the maxim um available capacity a t a g iven b lock s ize, b ut th e ex cess
capacity above the guaranteed level will vary between other drive families and from generation to generation, depending on how each block size actually forma
ts out for zone frequencies and splits over servo
bursts. This added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities
listed above. Using the drives in this manner gives the absolute maximum capacity potential, but the user
must determine if the extra capacity potential is useful, or whether their assurance of backward and forward compatibility t
akes precedence.
3.6Programmable drive capacity
Using the Mode Select command, the drive can change its capacity to something less than maximum. See the
Mode Select (6) parameter list table in the SAS Interface Manual, part number 100293071. A value of zero in
the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted to have.
A number other than zero and less than the maximum number of LBAs in the Number of Blocks field changes
the total drive capacity to the value in the Number of Blocks field. A value greater than the maximum numbe r of
LBAs is rounded down to the maximum capacity.
3.7Factory-installed options
You may order the following items which are incorporated at the manufacturing facility during production or
packaged before shipping. Some of the options available are (not an exhaustive list of possible options):
• Other capacities can be ordered depending on sparing scheme and sector size requested.
• Single-unit shipping pack. The drive is normally shippe
against transit damage. Units shipped individually require additional protection as pro vided by the single unit
shipping pack. Users planning single unit distribution should specify this option.
•The S
afety and Regulatory Agency Specifications, part number 75789512, is usually included with each
standard OEM drive shipped, but extra copies may be ordered.
Cheetah NS 10K.2 SAS Product Manual, Rev. C7
d in bulk packaging to provide maximum protection
4.0Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Cheetah NS SAS drives.
4.1Internal drive characteristics
ST3600002SSST3450802SS
Drive capacity600450GB (formatted, rounded off value)
Read/write data heads86
Tracks per inch165,000165,000TPI
Peak bits per inch1,3471,347 kBPI
Areal Density225225 Gb/inch
Internal data rate1.01 to 1.841.01 to 1.84 Gb/sec (variable with zone)
Disk rotation speed10K10Krpm
Avg rotational latency2.982.98ms
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2
*
4.2Seek performance
See Section 9.4.1, "SAS physical interface" on page 48 and the SAS Interface Manual (part number
100293071) for additional timing details.
4.2.1Access time
1
Not Including controller overhead2 (ms)
ReadWrite
AverageTypical3.84.4
Single trackTypical0.220.22
Full strokeTypical8.18.7
,
1.Typical access times are measured under nominal conditions of temperature, voltage, and
horizontal orientation as measured on a representative sample of drives.
2.Access to data = access time + latency time.
8Cheetah NS 10K.2 SAS Product Manual, Rev. C
4.2.2Format command execution time (minutes )
ST3600002SSST3450802SS
Maximum (with verify)182129
Maximum (without verify)10168
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request
for a Status Byte Transfer to the Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
4.2.3General performance characteristics
Sustainable disk transfer rate*:
Minimum82 MB/sec
Maximum150 MB/sec
SAS Interface maximum instant
Logical block sizes
Default is 512-byte data blocks
Sector sizes variable to 512, 520, 524, and 528 kbytes.
Read/write consecutive sectors on a trackYes
Flaw reallocation performance impact (for flaws reallocated at format time using
the spare sectors per sparing zone reallocation scheme.)
*Assumes no errors and no relocated logical blocks. Rate measured
from the host.
aneous transfer rate600 MB/sec* per port
Negligible
from the start of the first logical block transfer to or
4.3Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has
been applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START
STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 30
seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY
(ENABLE SPINUP) primitive, the drive waits for a START ST OP UNIT command with the START bit equal to 1.
After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY
(ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the
drive becomes ready for normal operations within 30 seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does
not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT
command.
The ST AR T STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 30 seconds (maximum) from removal of DC power.
There is no power control switch on the drive.
Cheetah NS 10K.2 SAS Product Manual, Rev. C9
4.4Prefetch/multi-segmented cache control
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many
cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in
cache operations. To select this feature, the host sends the Mode Select command with the proper values in
the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint
that each is enabled and disabled independently using the Mode Select command; however, in actual operation, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this
drive family are given in Section 9.3.2.1.
4.5Cache operation
Note.Refer to the SAS Interface Manual for more detail concerning the cache bits.
Of the 16 MB physical buffer space in the dr ive, approximate ly 13,0 00 kbytes can be used as a cache. The bu f-
fer is divided into logical segments from which data is read and to which data is written.
The drive keeps track of the logical block addresses of the data stored in each segment of the buffer. If the
cache is enabled (see RCD bit in the SAS Interface Manual ), data requested by the host with a read comman d
is retrieved from the buffer , if po ssible, before any disk acce ss is initiated. If cache operation is not enabled, the
buffer is still used, but only as circular buffer segments during disk medium read operations (disregarding
Prefetch operation for the moment). That is, the drive does not check in the buffer segments for the requested
read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer
segment on the way to the host. All data transfers to the host are in accordance with buffer-full ratio rules. See
the explanation provided with the information about Mode Page 02h (disconnect/reconnect control) in the SAS Interface Manual.
The following is a simplified description of the prefetch/cache operation:
Case A—read command is received and all of the requested logical blocks are already in the cache:
1. Drive transfers the requested logical blocks to the initiator.
Case B—A Read command requests data, and at least one requested logical block is not in any segment of
the cache:
1. The drive fetches the requested logical blo cks from the disk and transf ers them into a segment , and then
from there to the host in accordance with the Mode Select Disconnect/Reconnect parameters, page 02h.
2. If the prefetch feature is enabled, refe r to sec tio n 4.5.2 for operation from this point.
Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical
blocks. The drive dynamically creates and removes segments based on the workload. The wrap-around capability of the individual segments greatly enhances the cache’s overall performance.
Note.The size of each segment is not repo rted by Mode Sense command page 08h, byt es 14 and 15.
The value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size
specification using the Mode Select command (bytes 14 and 15) does not set up a new segment
size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does
for any attempt to change an unchangeable parameter.
4.5.1Caching write data
Write caching is a write operation by the drive that ma kes use o f a drive b uffer storage area wher e the da ta to
be written to the medium is stored while the drive performs the Write command.
If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made available for future read cache hits. The same buffer space and segmentation is used as set up for read functions.
10Cheetah NS 10K.2 SAS Product Manual, Rev. C
The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of
RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that
are to be written are already stored in th e cache from a previous read or write command. If there are, the
respective cache segments are cleared. The new data is cached for subsequent Read commands.
If the number of write data logical blocks exceed the size of the segme nt being written into, when the end of the
segment is reached, the data is written into the beginning of the same cache segment, overwriting the da ta that
was written there at the beginning of the operation; however, the drive does not overwrite data that has not yet
been written to the medium.
If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data
has been transferred into the cache, but before the data has been written to the medium. If an error occurs
while writing the data to the medium, and Good status has already been returned, a deferred error will be generated.
The Synchronize Cache command may be used to force the drive to write all cached write dat a to the med ium.
Upon completion of a Synchronize Cache command, all data received from previous write commands will have
been written to the medium.
Table 9.3.2.1 shows the mode default settings for the drive.
4.5.2Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disk immediately beyond that which
was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks (this is true even if cache
operation is disabled). Though the pr ef etch operation uses the buffer as a cache, finding the requested data in
the buffer is a prefetch hit, not a cache operation hit.
To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0
enables prefetch.
The drive does not use the Max Prefetch field (bytes 8 and 9) or the Prefetch Ceiling field (bytes 10 and 11).
When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous
blocks from the disk when it senses that a prefetch hit will likely occur. The drive disables prefetch when it
decides that a prefetch hit is not likely to occur.
Cheetah NS 10K.2 SAS Product Manual, Rev. C11
5.0Reliability specifications
The following reliability specifications assume correct host and drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints.
Seek error rate:Less than 10 errors in 10
Read Error Rates
1
Recovered DataLess than 10 sector in 1012 bits transferred (OEM default settings)
Unrecovered DataLess than 1 sector in 10
Miscorrected DataLess than 1 sector in 10
Interface error rate:Less than 1 error in 10
MTBF1,600,000 hours
Annualized Failure Rate (AFR)0.55%
Preventive maintenance:None required
1.Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
5.1Error rates
The error rates stated in this manual assume the following:
• The drive is operated in accordance with the manual using DC power as defined in Section 6.2.
• Errors caused by host system failures are excluded from error rate computations.
• Assume random data.
• Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write
retries and full retry time.
8
seeks
16
bits transferred
21
bits transferred
12
bits transferred
5.1.1Recoverable Errors
Recoverable errors are those detected and correcte d by the drive, and do not require user intervention.
Recoverable Data errors will use correction, although ECC on-the-fly is not considered for purposes of recov-
ered error specifications.
Recovered Data error rate is determined using read bits transferred for recoverab le errors occurring during a
read, and using write bits transferred for recoverable err ors occurring during a write.
5.1.2Unrecoverable Errors
Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 1016 bits transferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.
5.1.3Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an
initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,
12Cheetah NS 10K.2 SAS Product Manual, Rev. C
a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense
Key. Recoverable seek errors are specified at Less than 10 errors in 10
8
seeks. Unrecoverable seek errors
(Sense Key = 04h) are classified as drive failures.
5.1.4Interface errors
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the
device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss
of word sync, or CRC error.
5.2Reliability and service
You can enhance the reliability of disk drives by ensuring that the drive receives adequate cooling. Section 6.0
provides temperature measurements and other information that may be used to enhance the service life of the
drive. Section 8.2 provides recommended air-flow information.
5.2.1Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
These drives shall achieve an AFR of 0.55% (MTBF o f 1,600,000 hours) when operat ed in an environment th at
ensures the HDA case temperatures do not exceed the values specified in Section 6.4.1.
Operation at case temperatures outside the specifications in Section 6.4.1 may increase the AFR (dec rease
the MTBF).
AFR and MTBF statistics are population statistics that are no t relevant to individual unit s. AFR and M TBF specifications are based on the following assumptions for Enterprise Storage System environments:
• 8,760 power-on hours per year
• 250 average on/off cycles per year
• Operating at nominal voltages
• System provides adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not
exceeded.
5.2.2Preventive maintenance
No routine scheduled preventive maintenance is required.
5.2.3Hot plugging the drive
When a disk is powered on by switching the power or hot plugged, the drive runs a self test before attempting
to communicate on its’ interfaces. When the self test completes successfully, the drive initiates a Link Reset
starting with OOB. An attached device should respond to the link reset. If the link reset attempt fails, or any
time the drive looses sync, the drive initiated link reset. The drive will initiate link reset once per second but
alternates between port A and B. Therefore each port will attempt a link reset once per 2 seconds assuming
both ports are out of sync.
If the self-test fails, the does not respond to link reset on the failing port.
Note.It is the responsibility of the systems integrator to assure that no temperature, energy, voltage haz-
ard, or ESD potential hazard is presented during the hot connect/disconnect operation. Discharge
the static electricity from the drive carrier prior to inserting it into the system.
Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is
required to insure data integrity.
Cheetah NS 10K.2 SAS Product Manual, Rev. C13
5.2.4S.M.A.R.T.
S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended
to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a
failure to allow you to back up the data before an actual failure occurs.
Note.The drive’s firmware monitors specific attributes for degrad ation over time but can’t predict inst ant a-
neous drive failures.
Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating performance of the drive and the thresholds are op tim ized to minimize “false” and “failed” predictions.
Controlling S.M.A.R.T.
The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions
Control mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. featur e. Setting the DEXCPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collect s on-line data as the drive performs
normal read and write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode
Only” and will not perform off-line functions.
You can measure off-line attributes and force the drive to save the data by using the Rezero Unit comma nd.
Forcing S.M.A.R.T. resets the timer so that the next scheduled interrupt is in two hours.
You can interrogate the drive through the host to determine the time remaining before the ne xt scheduled measurement and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E.
This allows you to control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command
resets the timer.
Performance impact
S.M.A.R.T. attribute data is saved to the disk so th at the events that cau sed a predictive failure can be r ecreated. The drive measures and saves paramete rs once every two hours subject to an idle period on the drive
interfaces. The process of measuring off-line attribute data and saving data to the disk is uninterruptable. The
maximum on-line only processing delay is summarized below:
Maximum processing delay
On-line only delay
DEXCPT = 0, PERF = 1
S.M.A.R.T. delay times42 ms163 ms
Fully-enabled delay
DEXCPT = 0, PERF = 0
5.2.5Reporting control
Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to
the reporting method, the firmware will issue to the host an 01-5Dxx sense code. The error code is preserved
through bus resets and power cycles.
Determining rate
S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors
increases to an unacceptable level. To determine rate, error events are logged a nd com pared to the number of
total operations for a given attribute. The interval defines the number of opera tions o ver whic h to me asure the
rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter .
S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of
the number of errors for the current interval. This counter is referred to as the Failure Counter.
Error rate is the number of errors per operation. The algori thm that S.M.A.R.T. uses to record rates of error is to
set thresholds for the number of errors and their interval. If the number of errors exceeds the threshold before
14Cheetah NS 10K.2 SAS Product Manual, Rev. C
the interval expires, the error rate is considered to be unacceptable. If the number of errors does not exceed
the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the interval and failure counters are reset and the process starts over.
Predictive failures
S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firmware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented e ach time the erro r rate is unacceptable and decremented (not to exceed
zero) whenever the error rate is acceptable. If the counter continually increments such that it reaches the predictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter.
There is a separate Failure History Counter for each attribute.
5.2.6Thermal monitor
Cheetah drives implement a temperature warning system which:
1. Signals the host if the temperature exceeds a value which would threaten the drive.
2. Signals the host if the temperature exceeds a user-specified value.
3. Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value.
A temperature sensor monitors the drive temperature and issues a warning over the interface when the temperature exceeds a set th reshold. The t emperature is measured a t power-up an d then at te n-minute inter vals
after power-up.
The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified limit in compliance with the SCSI standard. The drive temperature is reported in the FRU code field of
mode sense data. You can use this information to determine if the warning is due to the temperature exceeding
the drive threatening temperature or the user-specified temperature.
This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled b y the
Method of Reporting Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC)
mode page (1Ch).
The current algorithm implements two temperature trip points. The first trip point is set at 68°C which is the
maximum temperature limit according to the drive specification. The second trip point is user-selectable using
the Log Select command. The reference temperature parameter in the temperature log page (see Table 11)
can be used to set this trip point. The default value for this d rive is 68 °C, however, you can set it to any value in
the range of 0 to 68°C. If you specify a temperature greater than 68°C in this field, the temperature is rounded
down to 68°C. A sense code is sent to the host to indicate the rounding of the parameter field.
Table 11: Temperature Log Page (0Dh)
Parameter CodeDescription
0000hPrimary Temperature
0001hReference Temperature
5.2.7Drive Self Test (DST)
Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a
failed unit. DST validates the functionality of the drive at a system level.
There are two test coverage options implemented in DST:
1. Extended test
2. Short test
Cheetah NS 10K.2 SAS Product Manual, Rev. C15
The most thorough option is the extended test that performs various tests on the d riv e a nd sca ns ev er y lo gic al
block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the
entire media surface, but does some fundamental tests and scans portions of the media.
If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test,
remove it from service and return it to Seagate for service.
5.2.7.1DST failure definition
The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log
page if a functional failure is encountered during DST. The channel and servo parameters are not modified to
test the drive more stringently, and the number of retries are not reduced. All retries and recovery processes
are enabled during the test. If data is recoverable, no failure condition will be reported regardless of the number
of retries required to recover the data.
The following conditions are considered DST failure conditions:
• Seek error after retries are exhausted
• Track-follow error after retries are exhausted
• Read error after retries are exhausted
• Write error after retries are exhausted
Recovered errors will not be reported as diagnostic failures.
5.2.7.2Implementation
This section provides all of the information necessary to implement the DST function on this drive.
5.2.7.2.1State of the drive prior to testing
The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons
why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be
in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not
ready” cause.
While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a
failed drive.
A Drive Not Ready condition is reported by the drive under the following conditions:
• Motor will not spin
• Motor will not lock to speed
• Servo will not lock on track
• Drive cannot read configuration tables from the disk
In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.
5.2.7.2.2Invoking DST
To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short
test or 010b for the extended test) in bytes 1, bits 5, 6, and 7.
5.2.7.2.3Short and extended tests
DST has two testing options:
1. short
2. extended
These testing options are described in the following two subsections.
16Cheetah NS 10K.2 SAS Product Manual, Rev. C
Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan
segment.
Short test (Function Code: 001b)
The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within
120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and
scans portions of the media. A complete read/verify scan is not performed and only factual failures will report a
fault condition. This option provides a quick confidence test of the drive.
Extended test (Function Code: 010b)
The objective of the extended test option is to empirically test critical drive componen ts. For example, the seek
tests and on-track operations test the positioning mechanism. The read operation tests the read head element
and the media surface. The write element is tested through read/write/read operations. The integrity of the
media is checked through a read/verify scan of the media. Motor functionality is tested by default as a part of
these tests.
The anticipated length of the Extended test is reported through the Control Mode page.
5.2.7.2.4Log page entries
When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry is created
by inserting a new self-test parameter block at the b eginning of the se lf-test result s log par ameter section of the
log page. Existing data will be moved to make room for the new parameter block. The drive reports 20 parameter blocks in the log page. If there are more than 20 parameter blocks, the least recent parameter block will be
deleted. The new parameter block will be initialized as follows:
1. The Function Code field is set to the same value as sent in the DST command
2. The Self-Test Results Value field is set to Fh
3. The drive will store the log page to non-volatile memory
After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its SelfTest Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the
last 20 self-tests performed by the drive. Th e se lf- te st r esults value is a 4-bit field that reports the results of the
test. If the field is set to zero, the drive passed with no errors detected by the DST. If the field is not set to zero,
the test failed for the reason reported in the field.
The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The
Sense key, ASC, ASCQ, and FRU are used to report the failure condition.
5.2.7.2.5Abort
There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message
to abort the diagnostic.
You can abort a DST executing in background mode by using the abort code in the DST Function Code field.
This will cause a 01 (self-test aborted by the application client) code to appear in the self-test results values
log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).
5.2.8Product warranty
Beginning on the date of shipment to the customer and continuing for the period specified in your purchase
contract, Seagate warrants that each product (including components and subassemblies) that fails to function
properly under normal use due to defect in materia ls or workmanshi p or due to noncon formance to the applicable specifications will be repaired or replaced, at Seagate’s option and at no charge to the customer , if returned
by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty
procedure. Seagate will pay for transporting the repair or replacement item to the customer. For more detailed
Cheetah NS 10K.2 SAS Product Manual, Rev. C17
warranty information, refer to the standard terms and conditions of purchase for Seagate products on your purchase documentation.
The remaining warranty for a particular drive can be determined by calling Seagate Customer Service at
1-800-468-3472. You can also determine remaining warranty using the Seagate web site (www.seagate.com).
The drive serial number is required to determine remaining warranty information.
Shipping
When transporting or shipping a drive, use only a Seagate-approved container. Keep your original box. Seagate approved containers are easily identified by the Seagate Approved Package label. Shipping a drive in a
non-approved container voids the drive warranty.
Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in transit. Contact your authorized Seagate distributor to purchase additional b oxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.
Product repair and return information
Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does
not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory seal voids
the warranty.
18Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.0Physical/electrical specifications
This section provides information relating to the physical and electrical characteristics of the drive.
6.1AC power requirements
None.
6.2DC power requirements
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive
connector.
Table 12: ST3600002SS DC power requirements
1.5 Gb mode3 Gb mode6 Gb mode
Notes
Voltage+5V+12V [2]+5V+12V [2]+5V+12V [2]
Regulation[5]±5%±5% [2]±5%±5% [2]±5%±5% [2]
Avg idle current DCX
Maximum starting current
(peak DC) DC3σ[3]0.481.810.601.810.481.80
(peak AC) AC3σ[3]0.823.601.023.600.843.71
Delayed motor start (max) DC 3σ[1] [4]0.430.040.460.040.450.04
Peak operating current:
Typical DCX
Maximum DC3σ[1]0.380.680.400.660.430.67
Maximum (peak) DC3σ1.002.501.022.581.062.46
[1] [6]0.350.370.380.360.320.35
[1]0.380.660.390.650.420.66
(Amps)(Amps)(Amps)(Amps)(Amps)(Amps)
[1]Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current
peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35
Degrees C ambient.
[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
10,000 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been
completed and that the drive is able to accept selection by the host initiator.
[3]See +12V current profile in Figure 1.
[4]This condition occurs after OOB and Speed Negotiation completes but before the drive has received the
Notify Spinup primitive.
[5]See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and
Cheetah NS 10K.2 SAS Product Manual, Rev. C19
transient response.
[6]During idle, the drive heads are relocated every 60 seconds to a random location within the band from
ee-quarters to maximum track.
thr
Table 13:
ST3450802SS DC power requirements
1.5 Gb mode3 Gb mode6 Gb mode
Notes
Voltage+5V+12V [2]+5V+12V [2]+5V+12V [2]
Regulation[5]±5%±5% [2]±5%±5% [2]±5%±5% [2]
Avg idle current DCX[1] [6]0.360.330.380.320.320.31
Maximum starting current
(peak DC) DC3σ[3]0.471.780.611.780.461.77
(peak AC) AC3σ[3]0.924.041.004.140.763.45
Delayed motor start (max) DC 3σ[1] [4]0.440.040.460.040.460.04
Peak operating current:
Typical DC
Maximum DC3σ[1]0.380.640.400.610.430.62
Maximum (peak) DC3σ1.002.461.022.481.042.42
X[1]0.380.610.390.600.420.61
(Amps)(Amps)(Amps)(Amps)(Amps)(Amps)
[1]Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current
peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35
Degrees C ambient.
[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
0,000 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been
1
completed and that the drive is able to accept selectio n by the ho st initiat or.
[3]See +12V current profile in Figure 1.
[4]This condition occurs after OOB and Speed Negotiation completes but before the drive has received the
Spinup primitive.
Notify
[5]See paragraph 6.2.1, "Conducted n
oise immunity." Specified voltage tolerance includes ripple, noise, and
transient response.
[6]During idle, the drive heads are relocated every 60 seconds to a random location within the band from
ee-quarters to maximum track.
thr
General DC power requirement notes.
1. Minimum current loading for each supply vo ltage is not less than 1.7% of the maximum operating current
sh
own.
2. The +5V and +12V supplies should employ separate ground re turns.
3. Where power is provided to multiple drives from a
common supply, careful consideration for individual
drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak
starting current must be available to each device.
4. Parameters, other than spindle start, are measured after a 10-minute warm up.
5. No terminator power.
20Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.2.1Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power
connector.
+5V=250 mV pp from 0 to 100 kHz to 20 MHz
+12V=800 mV pp from 100 Hz to 8 KHz
450 mV pp from 8 KHz to 20 KHz
250 mV pp from 20 KHz to 5 MHz
6.2.2Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
6.2.3Current profiles
The +12V and +5V current profiles are shown below in figure 1.
Note: All times and currents are typical. See Table 12 for maximum current requirements.
Cheetah NS 10K.2 SAS Product Manual, Rev. C21
Figure 1. Typical ST3600002SS drive
+5V and +12V current profiles
Figure 2. Typical ST3450802SS drive
+5V and +12V current profiles
22Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.3Power dissipation
0.00
2.00
4.00
6.00
8.00
10.00
12.00
0.000
0.200
0.400
0.600
0.800
1.000
1.200
0.050.0100.0150.0200.0250.0300.0350.0
P
o
w
e
r
(
w
a
t
t
s
)
A
m
p
e
r
e
s
I/Os per Second
ST 3600002SS CURRENT /PO WE R vs THRO UGHPUT (SAS - 6.0GB)
Rand om 8 Blo ck Reads
0.00
2.00
4.00
6.00
8.00
10.00
12.00
0.000
0.200
0.400
0.600
0.800
1.000
1.200
0.050.0100.0150.0200.0250.0300.0350.0
P
o
w
e
r
(
w
a
t
t
s
)
A
m
p
e
r
e
s
I/Os per Second
ST 3450802SS CURRENT /PO WE R vs THRO UGHPUT (SAS - 6.0GB)
Rand om 8 Blo ck Reads
ST3600002SS
Typical power dissipation under idle conditions in 6Gb operation is10.03W (34.23 BTUs per hour) To obtain
operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). Locate
the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current,
+12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
5Volt A
12 Volt A
Watts
Figure 3. ST3600002SS (6 Gb) DC current and power vs. input/output operations per second
ST3450802SS
Typical power dissipation under idle conditions in 6Gb operation is 9.57W (32.66 BTUs per hour). To obtain
operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3). Locate
the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current,
+12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
5Volt A
12 Volt A
Watts
Figure 4. ST3450802SS (6 Gb) DC current and power vs. input/output operations per second
Cheetah NS 10K.2 SAS Product Manual, Rev. C23
6.4Environmental limits
HDA Temp.
Check Point
.5"
1.0"
Temperature and humidity values experienced by the drive must be such that condensation does not occur on
any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).
6.4.1Temperature
a. Operating
The maximum allowable continuous or sustained HDA case temp
Rate (AFR) is 122°F (50°C) The maximum allowable HDA case temperature is 60°C. Occasional excursions of HDA case temperatures above 122°F (50°C) or below 41°F (5°C) may occur without impact to
ecified AFR. Continual or sustained operation at HDA case temperatures outside these limits may
sp
degrade AFR.
Provided the HDA case temperatures limits are met, the dr
ive meets all specifications over a 41°F to 131°F
(5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 86°F (30°C) per
hour. Air flow m ay be needed in th e drive enclosure to keep within this range (see Section 8.3). Operation at
HDA case temperatures outside this range may adversely affect the drives ability to meet specifications. To
confirm that the required cooling for the electronics and HDA case is provided, place the drive in its final
mechanical configuration, perform random write/read operations and measure the HDA case temperature
after it has stabilized.
b. Non-operating
–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 86°F (30°C) per hour. This
cification assumes that the drive is packaged in th e shipping cont ainer designed b y Seagate for use with
spe
drive.
erature for the rated Annualized Failure
Figure 5. Location of the HDA temperature check point
24Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.4.2Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
b. Non-operating
5% to 95% non-condensing relative humidity.
6.4.3Effective altitude (sea level)
a. Operating
–1,000 to +10,000 feet (–305 to +3,048 meters)
b. Non-operating
–1,000 to +40,000 feet (–305 to +12,192 meters)
6.4.4Shock and vibration
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is
installed in an enclosure to which the stated shock and/or vibration criteria is applied, resona nces may occur
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,
it may be necessary to modify the enclosure to minimize drive movement.
The limits of shock and vibration defined within this document are specified with the drive mounted by any of
the four methods shown in Figure 6, and in accordance with the restrictions of Section 8.3.
6.4.4.1Shock
a. Operating—normal
The drive, as installed for normal operation, shall oper ate error free while subjected to intermittent shoc k not
exceeding:
• 15 Gs at a duration of 11 ms (half sinewave)
• 20 Gs at a duration of 2 ms (half sinewave)
• 60 Gs at a duration of 2 ms (half sinewave) when performing reads only
Shock may be applied in the X, Y, or Z axis. Shock is not to be repeated more than once every 2 seconds.
b. Operating—abnormal
Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent shock not exceeding 40 Gs at a d ura tion o f 11 ms (half sinewave). Shock occurring at abnormal levels
may promote degraded operational performance during the abnormal shock period. Specified operational
performance will continue when normal operating shock levels resume. Shock may be applied in the X, Y,
or Z axis. Shock is not to be repeated more than once every 2 seconds.
c. Non-operating
The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes
both isolated drives and integrated drives.
The drive subjected to nonrepetitive shock not exceeding the three values below, shall not exhibit device
damage or performance degradation.
• 80 Gs at a duration of 11 ms (half sinewave)
• 300 Gs at a duration of 2 ms (half sinewave)
• 150 Gs at a duration of 0.5 ms (half sinewave)
Shock may be applied in the X, Y, or Z axis.
Cheetah NS 10K.2 SAS Product Manual, Rev. C25
d. Packaged
Z
Y
X
Z
Y
X
Disk drives shipped as loose load (not p
alletized) general freight will be packaged to withstand drops from
heights as defined in the table below. For additional details refer to Seagate specifications 30190-001
(under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).
Package sizePackaged/product weightDrop height
<600 cu in (<9,800 cu cm)Any60 in (1524 mm)
600-1800 cu in (9,800-19,700 cu cm)0-20 lb (0 to 9.1 kg)48 in (1219 mm)
>1800 cu in (>19,700 cu cm)0-20 lb (0 to 9.1 kg)42 in (1067 mm)
>600 cu in (>9,800 cu cm)20-40 lb (9.1 to 18.1 kg)36 in (914 mm)
Drives packaged in single or
multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for
general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or
equivalent.
Figure 6. Recommended mounting
26Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.4.4.2Vibration
a. Operating—normal
The drive as installed for normal operation, shall comply with the complete specified performance while
subjected to continuous vibration not exceeding
10 - 300 Hz1.0 G RMS (0 to peak)
301 - 500 Hz0.5 G RMS (0 to peak)
Vibration may be applied in the X, Y, or Z axis.
b. Operating—abnormal
Equipment as installed for normal operation shall not incur physical damage while subjected to periodic
vibration not exceeding:
15 minutes of duration at major resonant frequency
Vibration occurring at these levels may degrade operational performance during the abnormal vibration
period. Specified operational performance will continue when normal operating vibration levels are
resumed. This assumes system recovery routines are available.
Operating abnormal translational random flat profile
5 - 500 Hz0.75 G (0 to peak)
10-300 Hz0.0029 G2/Hz
c. Non-operating
The limits of non-operating vibration shall apply to all conditions of handling and transportation. This
includes both isolated drives and integrated drives.
The drive shall not incur physical damage or degraded performance as a result of continuous vibration not
exceeding
Vibration may be applied in the X, Y, or Z axis.
5 - 22 Hz0.25 G (0 to peak, linear, swept sine, 0.5 octive/min)
22 - 350 Hz3 G (0 to peak, linear, swept sine, 0.5 octive/min)
350 - 500 Hz1 G (0 to peak, linear, swept sine, 0.5 octave/min)
6.4.5Acoustics
Sound power during idle mode shall be 3.4 bels typical when measured to ISO 7779 specification. Sound
power while operating shall be 3.6 bels typical when measured to ISO 7779 specification.
There will not be any discrete tones more than 10 dB above the masking noise on typical drives when measured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the
masking noise on any drive.
6.4.6Air cleanliness
The drive is designed to operate in a typical office environment with minimal environmental control.
6.4.7Corrosive environment
Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to
light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM
B845. However, this accelerated testing cannot duplicate every potential application environment.
Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corrosive chemicals as electronic drive component reliability can be affected by the installationenvironment. The silver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide,
chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components
should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or
Cheetah NS 10K.2 SAS Product Manual, Rev. C27
exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any
electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.
6.4.8European Union Restriction of Hazardous Substances (RoHS) Directive
Seagate designs its products to meet environmental protection
restricting certain chemical substances. A new law, the European Union Restriction of Hazardous Substances
(RoHS) Directive, restricts the presence of chemical substances, including Lead, Cadmium, Mercury,
Hexavalent Chromium, PBB and PBDE, in electronic products, effective July 2006. This drive is manufactured
with components and materials that comply with the RoHS Directive.
6.4.9China Restriction of Hazardous Substances (RoHS) Directive
This product has an Environmental Protection Use Period (EPUP) of 20 years. The following
table contains information mandated by China's "Marking Requirements for Control of Pollution
Caused by Electronic Information Products" Standard.
requirements worldwide, including regulations
"O" indicates the hazardous and toxic substa nce content of the p art (at the homogenou s material level) is lower
than the threshold defined by the China RoHS MCV Standard.
"X" indicates the hazardous and toxic substance content of the part (at the homogenous material level) is over
the threshold defined by the China RoHS MCV Standard.
6.4.10Electromagnetic susceptibility
See Section 2.1.1.1.
28Cheetah NS 10K.2 SAS Product Manual, Rev. C
6.5Mechanical specifications
Refer to Figure 7 for detailed physical dimensions. See Section 8.3, “Drive mounting.”
Height:1.013 in25.73 mm
Width:3.999 in101.57 mm
Depth:5.769 in146.53 mm
Weight:1.482 lb0.672 kg
Figure 7. Physical dimensions
Cheetah NS 10K.2 SAS Product Manual, Rev. C29
7.0Defect and error management
Seagate continues to use innovative technologies to manage defects and errors. These technologies are
designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation.
SCSI defect and error management involves drive internal defect/error management and SAS sys tem error
considerations (errors in communications between the initiator and the drive). In addition, Seagate provides
the following technologies used to increase data integrity and drive reliability:
• Background Media Scan (see Section 7.4)
• Media Pre-Scan (see Section 7.5)
• Deferred Auto-Reallocation (see Section 7.6)
• Idle Read After Write (see Section 7.7)
The read error rates and specified storage capacities are not dependent on host (initiator) defect management
routines.
7.1Drive internal defects/errors
During the initial drive format operation at the factory, media defects are identified, tagged as being unusable,
and their locations recorded on the drive primary defects list (referred to as the “P’ list and also as the ETF
defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place
on the medium and the location liste d in the defects reallocation table. The “P” list is no t altered after factory
formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment
are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator us ing the
Read Defect Data command.
Details of the SCSI commands supported by the drive are described in the SAS Interface Manual. Also, more
information on the drive Error Recovery philosophy is presented in the SAS Interface Manual.
7.2Drive error recovery procedures
When an error occurs during drive operation, the drive, if pr ogrammed to do so, performs e rror recover y procedures to attempt to recover the dat a . The error reco very procedur es used depend o n the options previously set
in the Error Recovery Parameters mode page. Error recovery and defect management may involve using several SCSI commands described in the SAS Interface Manual. The drive implements selectable error recovery
time limits required in video applications.
The error recovery scheme supported by the drive provides a way to control the to tal error r ecovery time for the
entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent in
error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode
page. The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry
Count or Write Retry Count bytes in the Error Recovery mode page.
The drive firmware error recovery algorithms consists of 11 levels for read recoveries and five levels for write.
Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re-
30Cheetah NS 10K.2 SAS Product Manual, Rev. C
read or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and
write retry counts.
Table 14 equates the read and write retry count with the maximum possible recovery time for read and write
recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations
are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recovery time limit for the command has not yet been met. Time needed to perform reallocation is not counted
against the recovery time limit.
When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still
perform data recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and
Recovery Time Limit parameters. However, the drive does not report any unrecovered errors.
Table 14: Read and write retry count maximum recovery times
Setting these retry counts to a value below the default setting could result in degradation of the unrecovered error rate which may exceed the value given in this product manual. A setting of zero (0) will result in
the drive not performing error recovery.
For example, suppose the read/write recovery page has the RC bit set to 0, read retry count set to 4, and
the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to FF FF hex (maximum). A four
LBA Read command is allowed to take up to 442.89 ms recovery time for each of the four LBAs in the
command. If the recovery time limit is set to 00 C8 hex (200 ms decimal) a four LBA read command is
allowed to take up to 200 ms for all error recovery within that command. The use of the Recovery Time
Limit field allows finer granularity on control of the time spent in error recovery. The recovery time limit only
starts counting when the drive is executing error recovery and it restarts on each command. Therefore,
each command’s total recovery time is subject to the recovery time limit. Note: A recovery time limit of 0
will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the Recovery
Time Limit field to 00 01.
Cheetah NS 10K.2 SAS Product Manual, Rev. C31
7.3SAS system errors
Information on the reporting of operational errors or faults across the interface is given in the SAS Interface
Manual. The SSP Response returns information to the host about numerous kinds of errors or faults. The
Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.
Status returned by the drive to the initiator is described in the SAS Interface Manual. Status reporting plays a
role in systems error management and its use in that respect is described in sections where the various commands are discussed.
7.4Background Media Scan
Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4
available from the T10 committee. BMS performs sequential reads across the entire pack of the media while
the drive is idle. In RAID arrays, BMS allows hot spare drives to be scanned for defects prior to being put into
service by the host system. On regular duty drives, if the host system makes use of the BMS Log Page, it can
avoid placing data in suspect locations on the media. Unreadable and recovered error sites will be logged or
reallocated per ARRE/AWRE settings.
With BMS, the host system can consume less power and system overhead by only checking BMS status and
results rather than tying up the bus and consuming power in the process of host-i nitiated media scan ning activity.
Since the background scan functions are only done dur ing idle periods, BMS ca uses a negligible imp act to system performance. The first BMS scan for a newly manufactured drive is performed as quickly as possible to
verify the media and protect data by setting the “Start time after idle” to 5ms, all subsequent scans begin after
500ms of idle time. Other features that normally use idle time to function will function normally because BMS
functions for bursts of 800ms and then suspends activity for 100ms to allow other background functions to
operate.
BMS interrupts immediately to service host commands from the interface bus while performing reads. BMS will
complete any BMS-initiated error recovery prior to returning to service host-initiated commands. Overhead
associated with a return to host-s ervicing activity from BMS only impacts the first command that interrupted
BMS, this results in a typical delay of about 1 ms.
7.5Media Pre-Scan
Media Pre-Scan is a feature that allows the drive to repair media errors that would otherwise have been found
by the host system during critical data accesses early in the drive’s life. The default setting for Media Pre-Scan
is enabled on standard products. Media Pre-Scan checks each write command to determine if the destination
LBAs have been scanned by BMS. If the LBAs have been verified, the drive proceeds with the normal write
command. If the LBAs have not been verified by BMS, Pre-Scan will convert the write to a write verify to certify
that the data was properly written to the disk.
Note.During Pre-Scan write verify commands, write performance may decrease by 50% until Pre-Scan
completes. Write performance testing should be performed after Pre-Sca n is complete. This may
be checked by reading the BMS status.
To expedite the scan of the full pack and subsequently exit from the Pre-Scan period, BMS will begin scanning
immediately when the drive goes to idle during the Pre-Scan period. In the event that the drive is in a high
transaction traffic environment and is unable to complete a BMS scan within 24 power on hours BMS will disable Pre-Scan to restore full performance to the system.
7.6Deferred Auto-Reallocation
Deferred Auto-Reallocation (DAR) simplifies reallocation algorithms at the system level by allowing the drive to
reallocate unreadable locations on a subsequent write command. Sites are marked for DAR during read oper-
32Cheetah NS 10K.2 SAS Product Manual, Rev. C
ations performed by the drive. When a write command is received for an LBA marked for DAR, the auto-reallocation process is invoked and attempts to rewrite the data to the original location. If a verification of this rewrite
fails, the sector is re-mapped to a spare location.
This is in contrast to the system having to use the Reassign Command to reassign a location that was unreadable and then generate a write command to rewrite the data. DAR is most effective when AWRE and ARRE
are enabled—this is the default setting from the Seagate factory. With AWRE and ARRE disabled DAR is
unable to reallocate the failing location and will report an error sense code indicating that a write command is
being attempted to a previously failing location.
7.7Idle Read After Write
Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods,
no active system requests, the drive reads recently written data from the media and compares it to valid write
command data resident in the drives data buffer. Any se ctor s that fail th e comparison result in the invocation of
a rewrite and auto-reallocation process. Th e process attempts to rewrite the data to the original location . If a
verification of this rewrite fails, the sector is re-mapped to a spare location.
Cheetah NS 10K.2 SAS Product Manual, Rev. C33
8.0Installation
J6
SAS Interface
connector
Cheetah disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on
the drive.
SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays
designed to accommodate the drive. In such systems, the host system typically provides a carrier or tray into
which you need to mount the drive. Mount the drive to th e carrier o r tray provided by the host system using four
6-32 UNC screws. Do not over-tighten or force the screws. You can mount the drive in any orientation.
Note.SAS drives are designed to be attached to the host system without I/O or power cables. If you
intend the use the drive in a non-backplane host system, connecting the drive using high-quality
cables is acceptable as long as the I/O cable length does not exceed 4 meters (13.1 feet).
Slide the carrier or tray into the appropriate bay in your host system using the instructions provided by the host
system. This connects the drive directly to your system’s SAS connector. The SAS connector is normally
located on a SAS backpanel. See Section 9.4.1 for additional information about these connectors.
Power is supplied through the SAS connector.
The drive is shipped from the factory low-level formatted in 512-byte logical blocks. You need to reformat the
drive only if you want to select a different logical block size.
Figure 8. Physical interface
8.1Drive orientation
The drive may be mounted in any orientation. All drive performance characterizations, however, have been
done with the drive in horizontal (disks level) and vertical (drive on its side) orientations, which are the two preferred mounting orientations.
34Cheetah NS 10K.2 SAS Product Manual, Rev. C
8.2Cooling
Above unit
Under unit
Note. Air flows in the direction shown (back to front)
or in reverse direction (front to back)
Above unit
Under unit
Note. Air flows in the direction shown or
in reverse direction (side to side)
The host enclosure must dissipate heat from the drive. You sh ou ld co nfirm that the host enclosure is designed
to ensure that the drive operates within the temperatur e measurement guidelines described in Section 6.4.1. In
some cases, forced airflow may be required to keep temperatures at or below the temperatures specified in
Section 6.4.1.
If forced air is necessary, possible air-flow patterns are shown in Figure 9. The air-flow pattern s ar e cr ea te d b y
fans either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-flow
patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met.
Figure 9. Air flow
Cheetah NS 10K.2 SAS Product Manual, Rev. C35
8.3Drive mounting
K x X = F < 15lb = 67N
Mount the drive using the bottom or side mounting holes . If you mount the drive using the bottom holes, e nsure
that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface.
The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm) . The followin g equation and paragraph define
the allowable mounting surface stiffness:
where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion
(units in inches or millimeters). The out-of-plane distortion (X) is determined by defining a plane with three of
the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a
known force (F) is applied to the fourth point.
Note.Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate
Technology that the drive can meet the shock and vibration specifications given herein while
mounted in such an adapter frame. Adapter frames that are available may not have a mechanical
structure capable of mounting the drive so that it can meet the shock and vibration specifications
listed in this manual.
8.4Grounding
Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the
user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electrically isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA
ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mounting the drive in the host equipment.
Increased radiated emissions may result if you do not provide the maximum surface area ground connection
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.
36Cheetah NS 10K.2 SAS Product Manual, Rev. C
9.0Interface requirements
This section partially describes the interface requirements as implemented on Cheetah drives. Additional information is provided in the SAS Interface Manual (part number 100293071).
9.1SAS features
This section lists the SAS-specific features supported by Cheetah® NS 10K.2 SAS drives.
9.1.1 task management functions
Table 15 lists the SAS task management functions supported.
Table 16 lists the SAS response codes returned for task management functions supported.
Table 16: Task management response codes
Function nameResponse co de
Function complete00
Invalid frame02
Function not supported04
Function failed05
Function succeeded08
Invalid logical unit09
Cheetah NS 10K.2 SAS Product Manual, Rev. C37
9.2Dual port support
Cheetah SAS drives have two independent ports. These ports may be connected in the same or dif ferent SCSI
domains. Each drive port has a unique SAS address.
The two ports run at the same link rate. The first port to successfully complete speed negotiation sets the link
rate support by both ports. When the second port participates in speed negotiation, it indicates the only supported speed is the speed selected by the first port. If the first port to complete speed negotiation looses sync
before the second port completes speed negotiation, both ports revert back to the power on condition of allowing either link rate (1.5 or 3.0 Gb/sec).
Subject to buffer availability, the Cheetah drives support:
• Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both
ports at the same time.
• Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving
frames on both ports.
38Cheetah NS 10K.2 SAS Product Manual, Rev. C
9.3SCSI commands supported
Table 17 lists the SCSI commands supported by Cheetah drives.
Table 17: Commands supported by Cheetah
Command nameCommand codeSupported
®
NS 10K.2 SAS family drives
Change Definition40hN
Compare39hN
Copy18hN
Copy and Verify3AhN
Format Unit [1]04hY
DPRY bit supportedN
DCRT bit supportedY
STPF bit supportedY
IP bit supportedY
DSP bit supportedY
IMMED bit supportedY
VS (vendor specific)N
Inquiry12hY
Date Code page (C1h)Y
Device Behavior page (C3h)Y
Firmware Numbers page (C0h)Y
Implemented Operating Def page (81h)Y
Jumper Settings page (C2h)Y
Supported Vital Product Data page (00h)Y
Unit Serial Number page (80h)Y
Lock-unlock cache36hN
Log Select4ChY
PCR bitY
DU bitN
DS bitY
TSD bitY
ETC bitN
TMC bitN
LP bitN
Log Sense4DhY
Application Client Log page (0Fh)Y
Buffer Over-run/Under-run page (01h)N
Cache Statistics page (37h)Y
Factory Log page (3Eh)Y
Last n Deferred Errors or Asynchronous Events page (0Bh)N
Last n Error Events page (07h)N
Cheetah NS 10K.2 SAS Product Manual, Rev. C39
Table 17: Commands supported by Cheetah
Command nameCommand codeSupported
®
NS 10K.2 SAS family drives (continued)
Non-medium Error page (06h)Y
Pages Supported list (00h)Y
Read Error Counter page (03h)Y
Read Reverse Error Counter page (04h)N
Self-test Results page (10h)Y
Background Medium Scan page (15h)Y
Start-stop Cycle Counter page (0Eh)Y
Temperature page (0Dh)Y
Verify Error Counter page (05h)Y
Write error counter page (02h)Y
Mode Select (same pages as Mode Sense 1Ah)15hY [2]
Mode Select (10) (same pages as Mode Sense 1Ah)55hY
Mode Sense1AhY [2]
Caching Parameters page (08h)Y
Control Mode page (0Ah)Y
Disconnect/Reconnect (02h)Y
Error Recovery page (01h)Y
Format page (03h)Y
Information Exceptions Control page (1Ch)Y
Background Scan mode subpage (01h)Y
Notch and Partition Page (0Ch)N
Protocol-Specific Port page (19h)Y
Power Condition page (1Ah)Y
Rigid Disk Drive Geometry page (04h)Y
Unit Attention page (00h)Y
Verify Error Recovery page (07h)Y
Xor Control page (10h)N
Mode Sense (10) (same pages as Mode Sense 1Ah)5AhY
Prefetch34hN
Read08hY
Read Buffer (modes 0, 2, 3, Ah and Bh supported)3ChY
Read Capacity25hY
Read Defect Data (10)37hY
Read Defect Data (12)B7hY
Read Extended28hY
DPO bit supportedY
FUA bit supportedY
Read Long3EhY
40Cheetah NS 10K.2 SAS Product Manual, Rev. C
Table 17: Commands supported by Cheetah
Command nameCommand codeSupported
®
NS 10K.2 SAS family drives (continued)
Reassign Blocks07hY
Receive Diagnostic Results1ChY
Supported Diagnostics pages (00h)Y
Translate page (40h)Y
Release17hY
Release (10)57hY
Request Sense03hY
Actual Retry Count bytesY
Extended SenseY
Field Pointer bytesY
Reserve16hY
3rd Party ReserveY
Extent ReservationN
Reserve (10)56hY
3rd Party ReserveY
Extent ReservationN
Rezero Unit01hY
Search Data Equal31hN
Search Data High30hN
Search Data Low32hN
Seek0BhY
Seek Extended2BhY
Send Diagnostics1DhY
Supported Diagnostics pages (00h)Y
Translate page (40h)Y
Set Limits33hN
Star t Unit/Stop Unit (spindle ceases rotating)1BhY
Synchronize Cache35hY
Test Unit Ready00hY
Verify2FhY
BYTCHK bitY
Write0AhY
Write and Verify2EhY
DPO bitY
Write Buffer (modes 0, 2, supported)3BhY
Firmware Download option
*Copyright year (changes with actual year).
**SCSI Revision support. Refer to the appropriate SPC release documentation for definitions.
PP 10 = Inquiry data for an Inquiry command received on Port A.
30 = Inquiry data for an Inquiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware releas e number.
S#Eight ASCII digits representing the eight d
[ ]Bytes 16 through 26 reflect the drive model number. The t able above shows the hex values for Model ST3600002SS.
Refer to the values below for the values of bytes 16 throug
ST3450802SS5354333435303830325353
1
2020202020Product ID
notice
igits of the product serial number.
h 26 of your particular model:
9.3.2Mode Sense data
The Mode Sense command provides a way for the drive to repo
rt its operating parameters to the initiator. The
drive maintains four sets of mode parameters:
1. Default values
Default values are hard-coded in the drive firmware stor
ed in flash E-PROM (nonvolatile memory) on the
drive’s PCB. These default values can be changed only by downloading a complete set of new firmware
into the flash E-PROM. An initiator can request and receive from the drive a list of default values and use
those in a Mode Select command to set up new current and saved values, where the values are changeable.
2. Saved values
Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that
re allowed to be changed can be changed by this method. Parameters in the saved values list that a re not
a
changeable by the Mode Select command get their values from default values storage.
When power is applied to the drive, it takes saved values fro
ues in volatile memory. It is
not possible to change the current values (or the saved values) with a Mode
m the media and stores them as current val-
Select command before the drive achieves operating speed and is “r ead y.” An attempt to do so results in a
“Check Condition” status.
Cheetah NS 10K.2 SAS Product Manual, Rev. C43
On drives requiring unique saved values, the required unique saved values are stored into the saved values storage location on the media prior to shipping the drive. Some drives may have unique firmware with
unique default values also.
On standard OEM drives, the saved values are taken from the default values list and stored into the saved
values storage location on the media prior to shipping.
3. Current values
Current values are volatile values being used by the drive to control its operation. A Mode Select command
can be used to change the values identified as changeable values. Originally, current values are installed
from saved or default values after a power on reset, hard reset, or Bus Device Reset message.
4. Changeable values
Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values
and saved values can be changed by a Mode Select command. A one (1) indicates the value can be
changed. A zero (0) indicates the value is not changeable. For example, in Table
page 81, in the row entitled “CHG.” These are hex numbers representing the changeable values for Mode
page 81. Note in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05
none of the bits are changeable. Note also that bytes 06, 07, 09, 10, and 11 are not changeable, because
those fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111 111. If there is a zero
in any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are ones,
all of these bits are changeable.
The changeable values list can only be changed by downloading new firmware into the flash E-PROM.
Note.Because there are often several dif fere nt versions of dr ive control firmware in the total pop ulation of
drives in the field, the Mode Sense values given in the following tables may not exactly match those
of some drives.
9.3.2.1, refer to Mode
The following tables list the values of the data bytes returned by the d rive in response to the Mode Sense command pages for SCSI implementation (see the SAS Interface Manual ).
Definitions:
DEF = Default value. Standard OEM drives are shipped configured this way.
CHG = Changeable bits; indicates if default value is changeable.
9.4Miscellaneous operating features and conditions
Table 19 lists various features and conditions. A “Y” in the support column indicates the feature or condition is
supported. An “N” in the support column indicates the feature or condition is not supported.
Table 19: Miscellaneous features
SupportedFeature or condition
NAutomatic contingent allegiance
NAsynchronous event notification
NSynchronized (locked) spindle operation
YSegmented caching
NZero latency read
YQueue tagging (up to 128 queue tags supported)
YDeferred error handling
YParameter rounding (controlled by Round bit in Mode Select page 0)
YReporting actual retry count in Extended Sense bytes 15, 16, and 17
NAdaptive caching
YSMP = 1 in Mode Select command needed to save RPL and rotational offset bytes
YTask set full
NACA active
NACA active, faulted initiator
Cheetah NS 10K.2 SAS Product Manual, Rev. C47
9.4.1SAS physical interface
SAS Interface
connector
Figure 10 shows the location of the SAS device connector J1. Figures 11 and 12 provide the dimensions of the
SAS device.
Details of the physical, electrical, and logical characteristics are provided within this section. The operational
aspects of Seagate’s SAS drives are provided in the SAS Interface Manual.
The SAS connector complies with SFF-8482.
Figure 10. Ph ysical interface
48Cheetah NS 10K.2 SAS Product Manual, Rev. C
C OF DATUM B
L
5.08
1.27 (6X)
1.27 (14X)
15.875
0.35MIN
15.875
33.43 0.05
B
4.90 0.08
0.84 0.05 (22X)
0.15 B
P15
P1
S7
S1
SEE Detail1
0.30 0.05 (4X)
4.00 0.08
0.15 D
0.30 0.05 (2X)
41.13 0.15
B
B
C
C
A
A
0.20 B
42.73 REF.
C OF DATUM D
L
1.10
R0.30 0.08 (4X)
2.00 (3X)
5.08
0.45 0.03 (7X)
0.10 M E
4.65
0.80 (6X)
7.625.92
0.52 0.08 x 45
Figure 11. SAS connector dimensions
Cheetah NS 10K.2 SAS Product Manual, Rev. C49
6.10
Detail A
0.30 0.05 x 45 (5X)
0.40 0.05 X 45 (3X)
CORING ALLOWED
IN THIS AREA.
2.25 0.05
4.85 0.05
0.10 B
E
S14
S8
4.40 0.15
SEE Detail 2
3.90 0.15
SECTION A - A
SECTION C - C
A
0.35 0.05
45
R0.30 0.08
C
1.95 0.08
0.08 0.05
1.23 0.05
0.08 0.05
Detail 2
CONTACT SURFACE FLUSH
TO DATUM A 0.03
65
30
1.90 0.08
SECTION B - B
2.40 0.08
0.10 A
D
Figure 12. SAS connector dimensions
9.4.2Physical characteristics
This section defines physical interface connector.
9.4.3Connector requirements
Contact your preferred connector manufacturer for mating part information.
The SAS device connector is illustrated in Figures 11 and 12.
50Cheetah NS 10K.2 SAS Product Manual, Rev. C
9.4.4Electrical description
SAS drives use the device connector for:
• DC power
• SAS interface
• Activity LED
This connector is designed to either plug dir
ectly into a backpanel or accept cables.
9.4.5Pin descriptions
This section provides a pin-out of t
he SAS device and a description of the functions provid e d by the pin s.
Table 21: SAS pin descriptions
PinSignal nameSignal typePinSignal nameSignal type
S1Port A GroundP1*NC (reserved 3.3Volts)
S2*+Port A_inDiff. input pairP2*NC (reserved 3.3Volts)
S3*-Port A_inP3NC (reserved 3.3Volts)
S4Port A GroundP4Ground
S5*-Port A_outDiff output pairP5Ground
S6*+Port A_outP6Ground
S7Port A GroundP75 Volts charge
S8Port B GroundP8*5 Volts
S9*+Port B_inDiff. input pairP9*5 Volts
S10*-Port B_inP10Ground
S11Port A GroundP1 1* Ready LEDOpen collector out
S12*-Port B_outDiff output pairP12Ground
S13*+Port B_outP1312 Volts charge
S14Port B GroundP14*12 Volts
P15* 12 V olt s
* - Short pin to support hot plugging
NC - No connection in the drive.
Cheetah NS 10K.2 SAS Product Manual, Rev. C51
9.4.6SAS transmitters and receivers
A typical SAS differential copper transmitter and receiver pair is shown in Figure 13. The receiver is AC coupling to eliminate ground shift noise.
TX
Transmitter
100
TY
Figure 13. SAS transmitters and receivers
Differential
Transfer Medium
.01
.01
RX
Receiver
100
RY
9.4.7Power
The drive receives power (+5 volts and +12 volts) through the SAS device connector.
Three +12 volt pins provide power to the drive, 2 short and 1 long. The current return for the +12 volt power
supply is through the common ground pins. The supply current and return current must be distributed as
evenly as possible among the pins.
Three +5 volt pins provide power to the drive , 2 short and 1 long. The current return for the +5 volt power supply is through the common ground pins. The supply curre nt and re turn curr ent must be di stributed as evenly as
possible among the pins.
Current to the drive through the long power pins may be limited by the system to reduce inrush current to the
drive during hot plugging.
9.5Signal characteristics
This section describes the electrical signal characteristics of the drive’s input and output signals. See Table 21
for signal type and signal name information.
9.5.1Ready LED Out
The Ready LED Out signal is driven by the drive as indicated in Table 22.
Table 22: Ready LED Out conditions
Normal command activityLED status
Ready LED Meaning bit mode page 19h
Spun down and no activityOffOff
Spun down and activity (command executing)OnOn
Spun up and no activityOnOff
Spun up and activity (command executing)OffOn
Spinning up or downBlinks steadily
(50% on and 50% off, 0.5 seconds on and off for 0.5 seconds)
Format in progressToggles on/off
Write Same command in progressToggles on/off
01
52Cheetah NS 10K.2 SAS Product Manual, Rev. C
The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the
proper +3.3 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are external to the drive. See Table 23 for the output characteristics of the LED drive signals.
Table 23: LED drive signal
StateTest conditionOutput voltage
LED off, high0 V
LED on, lowI
≤ VOH ≤ 3.6 V-100 µA < I
= 15 mA0 ≤ VOL ≤ 0.225 V
OL
< 100 µA
OH
9.5.2Differential signals
The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS
standard.
Table 24 defines the general interface characteristics.
Table 24: General interface characteristics
CharacteristicUnits1.5Gb/s3.0Gb/s
Bit rate (nominal)Mbaud1,5003,000
Unit interval (UI)(nominal)ps666.6333.3
Impedance (nominal, differential )ohm100100
Transmitter transients, maximumV± 1.2± 1.2
Receiver transients, maximumV± 1.2± 1.2
9.5.2.1Eye masks
9.5.2.1.1Eye masks overview
The eye masks are graphical representations of the voltage and time limits on the signal at the compliance
point. The time values between X1 and (1 - X1) cover all but 10
-12
of the jitter population. The random content
of the total jitter population has a range of ± 7 standard deviations.
Cheetah NS 10K.2 SAS Product Manual, Rev. C53
9.5.2.1.2Receive eye mask
Figure 14 describes the receive eye mask. This eye mask applies to jitter after the application of a single pole
high-pass frequency-weighting function that progressively attenuates jitter at 20 dB/decade below a frequency
of ((bit rate) / 1.667).
Figure 14. Receive eye mask
Verifying compliance with the limits represented by the receive eye mask should be done with reverse channel
traffic present in order that the effects of crosstalk are taken into account.
9.5.2.1.3Jitter tolerance masks
Figure 15 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in
table 27. X1
is half the value for total jitter intable 27 and X1
OP
is half the value for total jitter in table 28, for
TOL
jitter frequencies above ((bit rate) / 1.667).
Figure 15. Receive tolerance eye mask
54Cheetah NS 10K.2 SAS Product Manual, Rev. C
The leading and trailing edge slopes of figure 14 shall be preserved. As a result the amplitude value of Z1 is
is the value for Z1 to be used for the tolerance masks; and
TOL
Z1
, X1OP, and X2OP are the values in table 26 for Z1, X1, and X2.
OP
The X1 points in the receive tolerance masks are greater than the X1 points in the receive masks, due to the
addition of sinusoidal jitter.
Figure 16 defines the sinusoidal jitter mask.
and Z1OP shall be defined from those slopes by the following equa-
TOL
Figure 16. Sinusoidal jitter mask
Cheetah NS 10K.2 SAS Product Manual, Rev. C55
9.5.2.2Transmitter signal characteristics
Ta ble 25 specifies the signa l requirements at the transmitter end of a TxRx connection as measured into the
zero-length test load. All specifications are based on differential measurements.
The OOB sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate.
Table 25 specifies the signal characteristics.
Table 25: Transmitter signal characteristics
Signal characteristic
b
Skew
Tx Off Voltage
Maximum rise/fall time
Minimum rise/fall time
Maximum transmitter output imbalance
OOB offset delta
OOB common mode delta
a All tests in this table shall be performed with zero-length test load shown in figure 18.
b The skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical
link. The same stable trigger, coherent to the data stream, shall be used for both the Tx+ and Tx- signals. Skew is
defined as the time difference between the means of the midpoint crossing times of the Tx+ signal and the Tx- signal.
c The transmitter off voltage is the maximum A.C. voltage measured at compliance points when the transmitter is
unpowered or transmitting D.C. idle (e.g., during idle time of an OOB signal).
d Rise/fall times are measured from 20 % to 80 % of the transition with a repeating 0101b pattern on the physical link.
e The maximum difference between the V+ and V- A.C. RMS transmitter amplitudes measured on a CJTPAT test
pattern (see 9.5.2.3.3) into the test load shown in figure 18, as a percentage of the average of the V+ and V- A.C.
RMS amplitudes.
f The maximum difference in the average differential voltage (D.C. offset) component between the burst times and the
idle times of an OOB signal.
g The maximum difference in the average of the common mode voltage between the burst times and the idle times of
Table 26 defines the compliance point requirements of the signal at the receiver end of a TxRx connection as
measured into the test loads specified in figure 17 and figure 18.
Table 26: Receiver signal characteristics
Signal characteristicUnits1.5Gb/s3.0Gb/s
Jitter (see figure 14)
b
N/ASee table 27See table 27
2 x Z2mV(P-P)1,2001,600
2 x Z1mV(P-P)325275
a
X1
UI0.2750.275
X2UI0.500.50
d
Skew
ps8075
Max voltage (non-op)mV(P-P)2.0002.000
Minimum OOB ALIGN burst amplitude
Maximum noise during OOB idle time
Max near-end crosstalk
a The value for X1 shall be half the value given for total jitter in table 27. The test or analysis shall include the effects of
a single pole high-pass frequency-weighting function that progressively attenuates jitter at 20 dB/decade below a
frequency of ((bit rate) / 1,667).
b The value for X1 applies at a total jitter probability of 10
between the mask and actual signals is not a valid method for determining compliance with the jitter output
requirements.
c With a measurement bandwidth of 1.5 times the baud rate (i.e. 4.5 GHz for 3.0Gb/s).
d The skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical
link. The same stable trigger, coherent to the data stream, shall be used for both the Rx+ and Rx- signals. Skew is
defined as the time difference between the means of the midpoint crossing times of the Rx+ signal and the Rx- signal.
e Near-end crosstalk is the unwanted signal amplitude at receiver terminals DR, CR, and XR coupled from signals and
noise sources other than the desired signal. Refer to SFF-8410.
e
c
c
mV(P-P)240240
mV(P-P)120120
mV(P-P)100100
-12
. At this level of probability direct visual comparison
9.5.2.3.1Jitter
Table 27 defines the maximum allowable jitter.
Table 27: Maximum allowable jitter
1.5Gb/s m,
Deterministic jitter
0.350.550.350.55
a Units are in UI.
b The values for jitter in this section are measured at the average amplitude po i n t.
c Total jitter is the sum of deterministic jitter and random jitter. If the actual deterministic jitter is less than the maximum
specified, then the random jitter may increase as long as the total jitter does not exceed the specified maximum total
jitter.
d Total jitter is specified at a probability of 10
e The deterministic and total values in this table apply to jitter after application of a single pole high-pass frequency-
weighting function that progressively attenuates jitter at 20 dB/decade below a frequency of ((bit rate) / 1 667).
f If total ji tter receiv ed at a ny point is less than the maximum allowed, then the jitter distribution of the signals is allowed
to be asymmetric. The total jitter plus the magnitude of the asymmetry shall not exceed the allowed maximum total
jitter. The numerical difference between the average of the peaks with a BER < 10
individual events is the measure of the asymmetry. Jitter peak-to-peak measured < (maximum total jitter -
|Asymmetry|).
q
n
Total jitterc,d,e,fDeterministic jittereTotal jitterc,d,e,f
-12
.
3.0Gb/s m,
-12
n
and the average of the
Cheetah NS 10K.2 SAS Product Manual, Rev. C57
9.5.2.3.2Receiver jitter tolerance
Table 28 defines the amount of jitter the receiver shall tolerate.
Table 28: Receiver jitter tolerance
jitter
a
e,f,h
Total
jitter
3.0Gb/s
h
Sinusoidal
b,d
jitter
-12
. Receivers shall tolerate sinusoidal jitter of
-12
. The additional 0.1 UI of sinusoidal jitter is
Deterministic
1.5Gb/s
Sinusoidal
b,c
jitter
0.100.350.650.100.350.65
a Units are in UI.
b The jitter values given are normative for a combination of deterministic jitter, random jitter, and sinusoidal jitter that
receivers shall be able to tolerate without exceeding a BER of 10
progressively greater amplitude at lower frequencies, according to the mask in figure 16 with the same determin istic
jitter and random jitter levels as were used in the high frequency sweep.
c Sinusoidal swept frequency: 900 kHz to > 5 MHz.
d Sinusoidal swept frequency: 1.800 kHz to > 5 MHz.
e No value is given for random jitter. For compliance with this standard, the actual random jitter amplitude shall be the
value that brings total jitter to the stated value at a probability of 10
added to ensure the receiver has sufficient operating margin in the presence of external interference.
f Deterministic jitter: 900 kHz to 750 MHz.
g Deterministic jitter: 1.800 kHz to 1.500 MHz.
h The deterministic and total values in this table apply to jitter after application of a single pole high-pass frequency-
weighting function that progressively attenuates jitter at 20 dB/decade below a frequency of ((bit rate) / 1.667).
Deterministic
jitter
a
e,g,h
Total
jitter
h
9.5.2.3.3Compliant jitter test pattern (CJTPAT)
The CJTPAT within a compliant protocol frame is used for all jitter testing unless otherwise specified. See the
SAS Interface Manual for definition of the required pattern on the physical link and information regarding special considerations for scrambling and running disparity.
9.5.2.3.4Impedance specifications
Table 29 defines impedance requirements.
Table 29: Impedance requirements (Sheet 1 of 2)
RequirementUnits1.5Gb/s3.0Gb/s
Time domain reflectometer rise time 20 % to 80 %
a,b
ps10050
Media (PCB or cable)
Differential impedance
Differential impedance imbalance
Common mode impedance
ohm20 min/40 max20 min/40 max
Transmitter source termination
Differential impedance
Differential impedance imbalance
Common mode impedance
a All times indicated for time domain reflectometer measurements are recorded times. Recorded times are twi ce the
transit time of the time domain reflectometer signal.
b All measurements are made through mated connector pairs.
c The media impedance measurement identifies the impedance mismatches present in the media when terminated in
its characteristic impedance. This measurement excludes mated connectors at both ends of the media, when
present, but includes any intermediate connectors or splices. The mated connectors measurement applies only to the
mated connector pair at each end, as applicable.
d Where the media has an electrical length of > 4 ns the procedure detailed in SFF-8410, or an equivalent procedure,
shall be used to determine the impedance.
e The receiver termination impedance specification applies to all receivers in a TxRx connection and covers all time
points between the connector nearest the receiver, the receiver, and the transmission line terminator. This
measurement shall be made from that connector.
f At the time point corresponding to the connection of the receiver to the transmission line the input capacitance of the
receiver and its connection to the transmission line may cause the measured impedance to fall below the minimum
impedances specified in this table. The area of the impedance dip (amplitude as ρ, the reflection coefficient, and
duration in time) caused by this capacitance is the receiver termination time constant. The receiver time constant
shall not be greater than the values shown in this table. An approximate value for the receiver termination time
constant is given by the product of the amplitude of the dip (as ρ) and its width (in ps) measured at the half amplitude
point. The amplitude is defined as being the difference in the reflection coefficient between the reflection coefficient at
the nominal impedance and the reflection coefficient at the minimum impedance point. The value of the receive r
excess input capacitance is given by the following equation:
b
b,g
b
ohm60 min/115 max 60 min/115 max
ohm55
ohm15 min/40 max15 min/40 max
where (R0 || RR) is the parallel combination of the transmission line characteristic impedance and
termination resistance at the receiver.
g The difference in measured impedance to ground on the plus and minus terminals on the interconnect, transmitter or
receiver, with a differential test signal applied to those terminals.
9.5.2.4Electrical TxRx connections
TxRx connections may be divided into TxRx connection segments. In a single TxRx connection individual
TxRx connection segments may be formed from differing media and materials, including traces on printed wiring boards and optical fibers. This subclause applies only to TxRx connection segments that are formed from
electrically conductive media.
Each electrical TxRx connection segmen t shall comply with the impedance requirements of table 29 for the
media from which they are formed. An equalizer network, if present, shall be part of the TxRx connection.
TxRx connections that are composed entirely of electrically conducting media shall be applied o nly to homogenous ground applications (e.g., betw een device s within an enclosure or rack, or between enclosures interconnected by a common ground return or ground plane).
9.5.2.4.1Transmitter characteristics
The drive are D.C. coupled.
A combination of a zero-length test load and the transmitter compliance transfer function (TCTF) test load
methodology is used for the specification of transmitter characteristics. This methodology specifies the trans-
Cheetah NS 10K.2 SAS Product Manual, Rev. C59
mitter signal at the test points on the required test loads. The transmitter uses the same settings (e.g., pre-
S
21
20–log10e()65,10
6–
f
05,
××()20,10
10–
f××()33,10
20–
f2××()++()× dB×=
S
21
5 437,–dB=
21
20–log10e()65,10
6–
f
05,
××()20,10
10–
f××()33,10
20–
f2××()++()× dB×=
S
21
10 884,–dB=
emphasis, voltage swing) with both the zero-length test load and the TCTF test load. The signal specifications
at IR are met under each of these loading conditions.
The TCTF is the mathematical statement of the transfer function thro ugh which the transmitter shall be cap able
of producing acceptable signals as defined by a receive mask. The transmission magnitude response of the
TCTF in dB is given by the following equation for 1.5Gb/s:
for 50 MHz < f < 1.5 GHz, and:
for 1.5 GHz < f < 5.0 GHz,
where:
a) f is the signal frequency in hertz.
The transmission magnitude response of the TCTF in dB is given by the following equation for 3.0Gb/s:
for 50 MHz < f < 3.0 GHz, and:
for 3.0 GHz < f < 5.0 GHz,
where f is the signal frequency in hertz.
The TCTF is used to specify the requirements on transmitter s that may or may not in corporate pre- emphasis or
other forms of compensation. A compliance interconnect is any physical interconnect with loss equal to or
greater than that of the TCTF at the above frequencies that also meets the ISI loss requirements shown in figure 19 and figure 20.
Compliance with the TCTF test load requirement is verified by measuring the signal produced by the transmitter through a physical compliance interconnect attached to the transmitter.
Compliance with the zero-length test load requirement verified by measurement made across a load equivalent to the zero-length load shown in figure 18.
For both test load cases, the transmitter delivers the output voltages and timing listed in table 26 at the designated compliance points. The default mask is IR for intra-cabinet TxRx connectio ns. The eye masks are sho wn
in 9.5.2.1.
Figure 17 shows the compliance interconnect test load.
Figure 17. Compliance interconnect test load
60Cheetah NS 10K.2 SAS Product Manual, Rev. C
Figure 18 shows the zero-length test load.
Figure 18. Zero-length test load
Figure 19 shows an ISI loss example at 3.0Gb/s.
Figure 19. ISI loss example at 3.0Gb/s
Figure 20 shows an ISI loss example at 1.5Gb/s.
Figure 20. ISI loss example at 1.5Gb/s
Cheetah NS 10K.2 SAS Product Manual, Rev. C61
9.5.2.5Receiver characteristics
The drive receiver is A.C. coupled. The receive network terminates the TxRx connection by a 100 ohm equivalent impedance as specified in table 29.
The receiver operates within a BER of 10
-12
when a SAS signal with valid voltage and timing characteristics is
delivered to the compliance point from a 100 ohm source. The received SAS signal are considered valid if it
meets the voltage and timing limits specified in table 26.
Additionally the receiver operates within the BER objective when the signal at a receiving phy has the additional sinusoidal jitter present that is specified in table 28 and the common mode signal V
range F
as specified in table 24. The jitter tolerance is shown in Figure 16 for all Rx compliance points in a
CM
over frequency
CM
TxRx connection. The figure given assumes that any exte rnal interference oc curs prior to th e point at which the
test is applied. When testing the jitter tolerance capability of a receiver, the additional 0.1 UI of sinusoidal jitter
may be reduced by an amount proportional to the actual externally induced interference between the application point of the test and the input to the receiving phy. The additional jitter reduces the eye opening in both
voltage and time.
9.6SAS-2 Specification compliance
Seagate SAS-2 drives are entirely compatible with the latest SAS-2 Specification (T10/1760-D) Revision 16.
The most important characteristic of the SAS-2 drive at 6Gb/s is that the receiver is capable of adapting the
equalizer to optimize the receive margins. The SAS-2 drive has two types of equalizers:
1. A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-2 training pattern transmitted dur-
ing the SNW-3 training gap. The DFE circuit can derive an optimal equalization characteristic to compensate for many of the receive losses in the system.
2. A Feed Forward Equalizer (FFE) optimize d to prov ide balanced receive margins over a range of channels
bounded by the best and worst case channels as defined by the relevant ANSI standard.
9.7Additional information
Please contact your Seagate representative for SAS electrical details, if required.
For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the
Seagate SAS Interface Manual, part number 100293071.
For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI
Commands Reference Manual, part number 100293068.
62Cheetah NS 10K.2 SAS Product Manual, Rev. C
10.0Seagate Technology support services
Internet
For information regarding Seagate products and services, visit www.sea
Worldwide support is available 24 hours daily by email for your questions.
Presales Support:
Presales@Seagate.com
Technical Support:
DiscSupport@Seagate.com
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mySeagate
my.sea
self-service access to critical applicat ions, personalized conten t and the tools that allow our partners to manage their Seagate account functions. Submit pricing requests, orders and returns through a single, passwordprotected Web interface-anytime, anywhere in the world.
spp.seagate.com
spp.sea
may register for customized communications that are not availab le on the web. These commu nications cont ain
product launch, EOL, pricing, promotions and other channel-related information. To learn more about the benefits or to register, go to spp.sea
gate.com is the industry's first Web portal designed specifically for OEMs and distributors. It provides
gate.com supports Seagate resellers with product information, program benefits and sales tools. You
gate.com, any time, from anywhere in the world.
gate.com.
Global Customer Support
Presales Support
Our Presales Support staff can help you determine which Seagate products are best suited for your specific
application or computer system, as well as product availability and compatibility.
Technical Support
Seagate technical support is availa ble to assist you online at suppo rt.seagate.com or through one of our call
centers. Have your system configuration information and your "ST" model/product number available.
Cheetah NS 10K.2 SAS Product Manual, Rev. C63
Customer Service Operations
Warranty Service
Seagate offers worldwide customer su pport fo r Seag ate products. Seagate distributors, OEMs and other direct
customers should contact their Seagate Customer Service Operations (CSO) representative for warrantyrelated issues. Resellers or end users of drive product s sh ould cont a ct their place of purcha se or Seagate warranty service for assistance. Have your serial number and model or part number available.
Data Recovery Services
Seagate offers data recovery services for all formats and all brands of storage media. Our data recovery services labs are currently located throughout the world. Additional information, including an online request form
and data loss prevention resources, is available at http://services.sea
gate.com/index.aspx.
Authorized Service Centers
Seagate Service Centers are av ailable on a global basis for the return o f defective products. See www.sea-
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For an extensive list of telephone numbers to technical support, presales and warranty service in USA/
Canada/Latin America, including business hours, go to the "Contact Us" page on www.sea
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Call CenterToll-freeDirect dial
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and Mexico1-800-SEAGATE+1-405-324-4700
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For an extensive list of telephone numbers to technical support, presales and warranty service in Europe, the
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gate.com.
64Cheetah NS 10K.2 SAS Product Manual, Rev. C
Index
Numerics
12 volt
pins 52
5 volt pins 52
6 Gbps 62
A
abort task set function 37
AC coupling 52
AC power requirements 19
ACA active status 47
ACA active, faulted initiator status 47
acoustics 27
active LED Out signal 52
actuator
assembly design 5
adaptive caching 47
AFR 6
air cleanliness 27
air flow 35
Serial Attached SCSI 4
asynchronous event notification 47
audible noise 2
auto write and read reallocation
programmable 6
automatic contingent allegiance 47
average idle current 19, 20
average rotational latency 8
B
Background Media Scan 32
backpanel 51
BMS 32
buffer
data 6
space 10
busy status 47
C
cache operation 10
cache segments 10
caching write data 10
Canadian Department of Communications 2
capacity
unformatted 8
check condition status 47
chemical pollutants 27
China RoHS directive 28
class B limit 2
clear ACA function 37
clear task set function 37
commands supported 39
condensation 25
condition met/good status 47
connector
specifications 12
reliability and service 13
repair and return information 18
reporting actual retry count 47
reservation conflict status 47
resonance 25
return information 18
RoHS 28
rotation speed 8
P
package size 26
package test specification 4
packaged 26
parameter rounding 47
PCBA 36
peak bits per inch 8
peak operating current 19, 20
peak-to-peak measurements 21
performance characteristics