Publication number: 100671510, Rev. C February 2014
Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or
other countries. Constellation ES and SeaTools are either trademarks or registered trademarks of Seagate Technology LLC or one of
its affiliated companies in the United States and/or other countries. The FIPS logo is a certification mark of NIST, which does not imply
product endorsement by NIST, the U.S., or Canadian governments.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 written permission of Seagate Technology LLC.
Call 877-PUB-TEK1 (877-782-8351) to request permission.
When referring to 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
capacity is used for formatting and other functions, and thus will not be available for data storage. Actual quantities will vary based on
various factors, including file size, file format, features and application software. Actual data rates may vary depending on operating
environment and other factors. The export or re-export of hardware or software containing encryption may be regulated by the U.S.
Department of Commerce, Bureau of Industry and Security (for more information, visit www.bis.doc.gov), and controlled for import
and use outside of the U.S. Seagate reserves the right to change, without notice, product offerings or specifications.
For information regarding online support and services, visit http://www.seagate.com/www/en-us/about/contact_us/
Available services include:
• Presales & Technical support
• Global Support Services telephone numbers & business hours
• Authorized Service Centers
For information regarding Warranty Support, visit http://www.seagate.com/support/warranty-and-returns/
For information regarding data recovery services, visit http://www.seagate.com/services-software/data-recovery-services/
For Seagate OEM and Distribution partner portal, visit https://direct.seagate.com/portal/system
For Seagate reseller portal, visit http://spp.seagate.com
Constellation ES.3 SAS Product Manual, Rev. C 1
1.0SCOPE
This manual describes Seagate Technology® LLC, Constellation® ES.3 SAS (Serial Attached SCSI) disk drives.
Constellation ES.3 drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part
number 100293071) describes the general SAS characteristics of this and other Seagate SAS drives. The Self-Encrypting Drive
Reference Manual, part number 100515636, describes the interface, general operation, and security features available on Self-Encrypting
Drive models.
Product data communicated in this manual is specific only to the model numbers listed in this manual. The data listed in this manual may
not be predictive of future generation specifications or requirements. If you are designing a system which will use one of the models
listed or future generation products and need further assistance, please contact your Field Applications Engineer (FAE) or our global
support services group as shown in See “Seagate® Technology Support Services” on page 1.
Unless otherwise stated, the information in this manual applies to standard and Self-Encrypting Drive models.
Standard models
ST4000NM0023ST4000NM0043ST4000NM0063
ST3000NM0023ST3000NM0043ST3000NM0063
ST2000NM0023ST2000NM0043ST2000NM0063
ST1000NM0023ST1000NM0043ST1000NM0063
SELF-ENCRYPTING DRIVE
(SED)
FIPS 140-2 LEVEL 2
(REVIEW PENDING)
Previous generations of Seagate Self-Encrypting Drive models were called Full Disk
NOTE
Encryption (FDE) models before a differentiation between drive-based encryption and
other forms of encryption was necessary.
.
The Self-Encrypting Drive models indicated on the cover of this product manual have
NOTE
provisions for “Security of Data at Rest” based on the standards defined by the Trusted
Computing Group (see www.trustedcomputinggroup.org).
For more information on FIPS 140-2 Level 2 certification see Section 7.0 on page 38.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 2
2.0APPLICABLE STANDARDS AND REFERENCE DOCUMENTATION
The drives documented in this manual have been developed as system peripherals to the highest standards of design and construction.
The drives depends on 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 10.3.
2.1STANDARDS
The Constellation ES.3 family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SAS
Interface Manual, part number 100293071.
The drives are recognized in accordance with UL 60950-1 as tested by UL, CSA 60950-1 as tested by CSA, and EN60950-1 as tested by
TUV.
The security features of Self-Encrypting Drive models are based on the “TCG Storage Architecture Core Specification” and the “TCG
Storage Workgroup Security Subsystem Class: Enterprise_A” specification with additional vendor-unique features as noted in this
product manual.
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
subassembly and is not subject to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations 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 not provide adequate 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 2, DC power
requirements.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 3
2.1.2Electromagnetic compliance
Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and C-Tick Marking. The
drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for
test platforms. The system configurations include:
• Typical current use microprocessor
• Keyboard
• Monitor/display
• Printer
• 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
2004/108/EC as put into place on 20 July 2007.
Australian C-Tick
If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZ CISPR22 and meets the
Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Management Agency (SMA).
Korean KCC
If these drives have the Korean Communications Commission (KCC) logo, they comply with paragraph 1 of Article 11 of the
Electromagnetic Compatibility control Regulation and meet the Electromagnetic Compatibility (EMC) Framework requirements of the
Radio Research Laboratory (RRL) Communications Commission, Republic of Korea.
These drives have been tested and comply with the Electromagnetic Interference/Electromagnetic Susceptibility (EMI/EMS) for Class B
products. Drives are tested in a representative, end-user system by a Korean-recognized lab.
• Family name:Constellation ES.3 SAS
• Certificate number:KCC-REM-STX-Constell-ES3
• Manufacturing date: (Date of Certification) 2012-July-16
• Manufacturer/nationality: USA, Singapore and China
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).
2.1.3European Union Restriction of Hazardous Substances (RoHS)
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.
A number of parts and materials in Seagate products are procured from external suppliers. We rely on the representations of our suppliers
regarding the presence of RoHS substances in these parts and materials. Our supplier contracts require compliance with our chemical
substance restrictions, and our suppliers document their compliance with our requirements by providing material content declarations for
all parts and materials for the disk drives documented in this publication. Current supplier declarations include disclosure of the inclusion
of any RoHS-regulated substance in such parts or materials.
Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws and regulations which
restrict chemical content in electronic products. These systems include standard operating procedures that ensure that restricted
substances are not utilized in our manufacturing operations, laboratory analytical validation testing, and an internal auditing process to
ensure that all standard operating procedures are complied with.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 4
2.1.4China 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.
"O" indicates the hazardous and toxic substance content of the part (at the homogenous 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.
2.2REFERENCE DOCUMENTS
SAS Interface Manual
Seagate part number: 100293071
SCSI Commands Reference Manual
Seagate part number: 100293068
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.xxxSerial Attached SCSI (SAS-2) Standard (T10/1562-D)
ISO/IEC 14776-xxxSCSI Architecture Model-3 (SAM-4) Standard (T10/1561-D)
ISO/IEC 14776-xxxSCSI Primary Commands-3 (SPC-4) Standard (T10/1416-D)
ISO/IEC 14776-xxxSCSI Block Commands-2 (SBC-3) Standard (T10/1417-D)
ANSI Small Computer System Interface (SCSI) Documents
X3.270-1996(SCSI-3) Architecture Model
Trusted Computing Group (TCG) Documents (apply to Self-Encrypting Drive models only)
Specification for Acoustic Test Requirement and Procedures
Seagate part number: 30553-001
In case of conflict between this document and any referenced document, this document takes precedence.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 5
3.0GENERAL DESCRIPTION
Constellation ES.3 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.
Constellation ES.3 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. Constellation ES.3 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 6Gb/s serial data transfer rate.
The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of Data at Rest” based on
the standards defined by the Trusted Computing Group
(see www.trustedcomputinggroup.org).
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to maintain
a contamination-free HDA environment.
Never disassemble the HDA and do not attempt to service items in the sealed
NOTE
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.
Constellation ES.3 drives use a dedicated load/unload zone at the outermost radius of the media to eliminate the possibility of destroying
or degrading data by landing in the data zone. The heads automatically go to the ramp load/unload when power is removed from the
drive.
An automatic shipping lock prevents potential damage to the heads and discs 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.
Constellation ES.3 drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer
adjustments and related reliability concerns.
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.
NOTE
Seagate recommends validating your configuration with the selected HBA/RAID
controller manufacturer to ensure full 3TB and 4TB capacity capabilities.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 6
3.1STANDARD FEATURES
Constellation ES.3 drives have the following standard features:
• Integrated dual port SAS controller supporting the SCSI protocol
• Support for SAS expanders and fanout adapters
• Firmware downloadable using the SAS interface
• 128 - deep task set (queue)
• Supports up to 32 initiators
• Jumperless configuration.
• User-selectable logical block size (512, 520 or 528 bytes per logical block).
• Industry standard 3.5-in dimensions
• 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
• Embedded servo design
• Dedicated head load/unload zone
• Self diagnostics performed when power is applied to the drive
• Vertical, horizontal, or top down mounting
• 128 MB data buffer (see Section 4.4).
• Drive Self Test (DST)
• Background Media Scan (BMS)
• Seagate RAID Rebuild
• Idle Read After Write (IRAW)
• Power Save
TM
Constellation® ES.3 SAS Self-Encrypting Drive models have the following additional features:
• Automatic data encryption/decryption
• Controlled access
• Random number generator
• Drive locking
• 16 independent data bands
• Cryptographic erase of user data for a drive that will be repurposed or scrapped
• Authenticated firmware download
3.2MEDIA DESCRIPTION
The media used on the drive has a aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective
layer for improved durability and environmental protection.
3.3PERFORMANCE
• Programmable multi-segmentable cache buffer
• 600MB/s maximum instantaneous data transfers.
• 7200 RPM spindle. Average latency = 4.16ms
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
There is no significant performance difference between Self-Encrypting Drive and
standard (non-Self-Encrypting Drive) models.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 7
3.4RELIABILITY
• Annualized Failure Rate (AFR) of 0.63%
• Mean time between failures (MTBF) of 1,400,000 hours
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• 5-year warranty
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 points at certain block sizes that Seagate guarantees current and future 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
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
number 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 shipped in bulk packaging to provide maximum protection against transit damage.
Units shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should specify this option.
• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each standard OEM drive shipped,
but extra copies may be ordered.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 8
4.0PERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Constellation ES.3 drives.
Drive capacity4TB3TB2TB1TB (fomatted, rounded off value)
Read/write data heads10853
Bytes/track1,668,096Bytes (average, rounded off values)
Bytes/surface400,000MB (unfomatted, rounded off values)
Tracks/surface (total)320,800Tracks (user accessible)
Tracks/in305,000TPI (average)
Peak bits/in1,904,000BPI
Areal density578Gb/in2
Internal data rate2210Mb/s (max)
Disk rotation speed7200RPM
Avg rotational latency4.16ms
4.1.1Format command execution time for 512-byte sectors (minutes)
4TB models3TB models2TB models1TB models
Maximum (with verify)
Maximum (without verify)
917693456263
455347228132
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.
4.1.2General performance characteristics
Minimum sector interleave1 to 1
Maximum Internal data rate*2.21 Gb/s
Sustained transfer rate83 to 175 MB/s **
SAS Interface maximum instantaneous transfer rate600MB/s* per port
Logical block sizes
512 (default), 520 or 528.
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.)
(dual port = 1200MB/s*)
Negligible
Average rotational latency4.16ms
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or
from the host.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 9
4.2START/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 STOP 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 START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 23 seconds (maximum) from
removal of DC power. SCSI stop time is 23 seconds. There is no power control switch on the drive.
4.3PREFETCH/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 4.4.1 and 4.4.2.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table
11.
4.4CACHE OPERATION
.
NOTE
Refer to the SAS Interface Manual for more detail concerning the cache bits.
Of the 128MB physical buffer space in the drive, approximately (60,000) KB can be used as a cache. The buffer 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 command is retrieved from the buffer, if possible, before any disk
access 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 blocks from the disk and transfers 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, refer to section 4.4.2 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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 10
The size of each segment is not reported by Mode Sense command page 08h, bytes 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.
4.4.1Caching write data
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data 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. 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 the 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 segment 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 data 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 data to the medium. Upon completion of a
Synchronize Cache command, all data received from previous write commands will have been written to the medium. Table 11 shows the
mode default settings for the drive.
4.4.2Prefetch 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 prefetch 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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 11
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 errors in 1012 bits transferred (OEM default settings)
Unrecovered DataLess than 1 sector in 1015 bits transferred
Miscorrected DataLess than 1 sector in 10
Interface error rate:Less than 1 error in 10
Mean Time Between Failure (MTBF):1,400,000 hours
Annualized Failure Rate (AFR):0.63%
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 this manual using DC power as defined in paragraph 6.3, "DC power requirements."
• 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
21
bits transferred
12
bits transferred
5.1.1Recoverable Errors
Recoverable errors are those detected and corrected 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 recovered error specifications.
Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read, and using write bits
transferred for recoverable errors occurring during a write.
5.1.2Unrecoverable Errors
An unrecoverable data error is defined as a failure of the drive to recover data from the media. These errors occur due to head/media or
write problems. Unrecoverable data errors are only detected during read operations, but not caused by the read. If an unrecoverable data
error is detected, a MEDIUM ERROR (03h) in the Sense Key will be reported. Multiple unrecoverable data errors resulting from the
same cause are treated as 1 error.
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, 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 108 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 Constellation ES.3 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 10.2 provides
recommended air-flow information.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 12
5.2.1Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)
The product shall achieve an AFR of 0.63% (MTBF of 1,400,000 hours) when operated at nominal power and typical case temperatures
of 40°C. Operation at temperatures outside the specifications in Section 6.5 may increase the product AFR (decrease MTBF). AFR and
MTBF are population statistics that are not relevant to individual units.
The AFR and MTBF specifications are based on the following assumptions for business critical storage system environments:
• 8760 power-on hours per year.
• Operations at nominal voltages
• Temperatures outside the specifications in Section 6.5 may reduce the product reliability.
• A workload rate below the average annualized specified limits. Operation at excessive I/O duty cycle may degrade product reliability.
The enterprise application nearline environment of power-on-hours, temperature, and I/O duty cycle affect the product AFR and MTBF.
Nonrecoverable read errors1 per 1015 bits read, max
Annualized Failure Rate (AFR)0.63% (nominal power, 40°C case temperature)
Load unload cycles600,000 cycles
Rated WorkloadAverage rate of <550TB/year
The MTBF specification for the drive assumes the I/O workload does not exceed the
Average Annualized Workload Rate Limit of <550TB/year. Workloads exceeding the
annualized rate may degrade the drive MTBF and impact product reliability. The Average Annualized Workload Rate Limit is in units of TB per year, or TB per 8760 power
on hours. Workload Rate Limit = TB transferred * ( 8760 / recorded power on hours).
WarrantyTo determine the warranty for a specific drive, use a web browser to access the
Preventive maintenanceNone required.
following web page:
From this page, click on the "Verify Your Warranty" link. You will be asked to provide
the drive serial number, model number (or part number) and country of purchase.The
system will display the warranty information for your drive.
When a disk is powered on by switching the power or hot plugged, the drive ru ns a self test before att empting to commun icate 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 drive does not respond to link reset on the failing port.
It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard, 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.
5.2.3S.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 degradation
over time but can’t predict instantaneous 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 optimized to minimize “false” and “failed” predictions.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 13
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. feature. Setting the DEXCPT bit disables all S.M.A.R.T. functions.
When enabled, S.M.A.R.T. collects 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 command. Forcing S.M.A.R.T. resets the
timer so that the next scheduled interrupt is in one hour.
You can interrogate the drive through the host to determine the time remaining before the next 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 that the events that caused a predictive failure can be recreated. The drive measures and
saves parameters once every one hour subject to an idle period on the drive interfaces. The process of measuring off-line attribute data
and saving data to the disk is interruptable. The maximum on-line only processing delay is summarized below:
Maximum processing delay
Fully-enabled delay
DEXCPT = 0
S.M.A.R.T. delay times75 ms
Reporting control
Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). An example, if the MRIE is set to
one, the firmware will issue to the host an 01-5D00 sense code. The FRU field contains the type of predictive failure that occurred. 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 and compared to the number of total operations for a given attribute. The
interval defines the number of operations over which to measure 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 algorithm 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 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 each time the
error 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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 14
5.2.4Thermal monitor
Constellation ES.3 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
threshold. The temperature is measured at power-up and then at ten-minute intervals 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 by 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 65°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 1) can be used to set this trip point. The default value for this drive is 65°C, however,
you can set it to any value in the range of 0 to 65°C. If you specify a temperature greater than 65°C in this field, the temperature is
rounded down to 65°C. A sense code is sent to the host to indicate the rounding of the parameter field.
Table 1: Temperature Log Page (0Dh)
Parameter CodeDescription
0000h
0001h
Primary Temperature
Reference Temperature
5.2.5Drive 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
The most thorough option is the extended test that performs various tests on the drive and scans every logical 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.
5.2.5.1DST 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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 15
5.2.5.2Implementation
This section provides all of the information necessary to implement the DST function on this drive.
5.2.5.2.1State 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.
5.2.5.2.2Invoking 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.
5.2.5.2.3Short and extended tests
DST has two testing options:
1.short
2.extended
These testing options are described in the following two subsections.
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 components. 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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 16
5.2.5.2.4Log 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 beginning of the self-test results log parameter 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 Self-Test 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. The self-test
results 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.
5.2.5.2.5Abort
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).
5.2.6Product warranty
See “Seagate® Technology Support Services” on page 1 for warranty contact 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 boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer
equipment.
Storage
The maximum recommended storage period for the drive in a non-operational environment is 90 days. Drives should be stored in the
original unopened Seagate shipping packaging whenever possible. Once the drive is removed from the Seagate original packaging the
recommended maximum period between drive operation cycles is 30 days. During any storage period the drive non-operational temperature, humidity, wet bulb, atmospheric conditions, shock, vibration, magnetic and electrical field specifications should be followed.
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.
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 17
6.0PHYSICAL/ELECTRICAL SPECIFICATIONS
This section provides information relating to the physical and electrical characteristics of the drive.
6.1POWERCHOICETM POWER MANAGEMENT
Drives using the load/unload architecture provide programmable power management to tailor systems for performance and greater
energy efficiency.
The table below lists the supported PowerChoice modes. The further you go down in the table, the more power savings you get. For
example, Idle_B mode results in greater power savings than Idle_A mode. Standby_Z mode results in the greatest power savings.
PowerChoice modes
M
ODEDESCRIPTION
Idle_AReduced electronics
Idle_BHeads unloaded. Disks spinning at full RPM
Idle_CHeads unloaded. Disks spinning at reduced RPM
Standby_YHeads unloaded. Disks spinning at reduced RPM.
Standby_ZHeads unloaded. Motor stopped (disks not spinning)
PowerChoice
TM
can be invoked using one of these two methods:
Recovery requires the NOTIFY (Enable Spinup) command.
Recovery requires the NOTIFY (Enable Spinup) command.
• Power Condition mode page method—Enable and initialize the idle condition timers and/or the standby condition timers. The timer
values are based on the values set in the Power Condition mode page.
• START STOP UNIT command method—Use the START STOP UNIT command (OPERATION CODE 1Bh). This allows the host to
directly transition the drive to any supported PowerChoice mode.
If both the Power Condition mode page and START STOP UNIT command methods are used, the START STOP UNIT command request
takes precedence over the Power Condition mode page power control and may disable the idle condition and standby condition timers.
The REQUEST SENSE command reports the current PowerChoice state if active and also the method by which the drive entered the
PowerChoice state.
When the drive receives a command, all power condition timers are suspended if they were enabled via the Power Condition mode page.
Once all outstanding commands are processed, the power condition timers are reinitialized to the values defined in the Power Condition
mode page
CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. C 18
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