Seagate , Seagate Technology, and the Seagate logo are registered trademarks of Seagate T echnology, Inc. Elite, SeaFAX, SeaFONE, SeaNET, SeaTDD , and SeaBOARD are either trademarks
or registered trademarks of Seagate Technology, Inc. or one of i ts subsidiaries. All ot her 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 from
Seagate Technology, Inc.
Printed in the United States of America
Page 5
Revision status summary sheet
RevisionDateWriter/EngineerSheets Affected
A01/09/98L. Newman/B. RatheAll
This manual is volume 1 of a two-volume document with the SCSI interface information in the volume 2
SCSI Interface Product Manual
If you need SCSI interface information, order the volume 2
This manual describes Seagate Technology®, Inc. Elite 47™ disc drives.
Elite 47 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2,
and SCSI-3 (Fast-20 or Ultra SCSI) interface specifications to the extent described in this manual. The
Interface Product Manual
other families of Seagate drives.
From this point on in this product manual the reference to Eli te 47 models is referred to as “the drive” (unless
references to individual models are necessary).
(part number 77738479) describes general SCSI interface characteristics of this and
SCSI
Figure 1.Elite 47 disc drive
Page 12
Page 13
Elite 47 Product Manual, Rev. A3
2.0Applicable standards and reference documentation
The drive is a system peripheral developed to the highest standards of design and construction. The dr ive
depends on its host equipment to provide adequ ate power and environment to achieve optimum performance
and compliance with applicable i ndustry and government regulations. Special attention must be given in the
areas of safety, power distr ibution, shieldin g, audible no ise cont rol, and temperature regulation. Also, the drive
must be securely mounted to guarantee the specified performance characteristics.
2.1Standards
The Elite 47 family complies with Seagate standards as noted in the appropr iate sections of this manual and
the Seagate
The Elite 47 disc drive is a UL recog nized component per UL1 950, CSA cert ified to CSA C22.2 No. 950-789,
and VDE certified to VDE 0805 and EN 60950.
2.1.1Electromagnetic compatibility
The drive, as delivered, is designed f or s ystem integr ation and installation into a suitable enclosure prior to use.
As such, the drive is supplied as a su bassembly and is no t subject to S ubpar t B of Part 15 of t he FCC Ru les
and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.
The physical design characteristics of the dr ive serve to m inimize radiation when i nstal led in an enc losure that
provides reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules
and Regulations of the Canadian Depar tment of Communications when proper ly packaged. However, it is the
user’s responsibility to assure that the drive meets the appropriate EMI requiremen ts in their system. Shielded
I/O cables may be required if the enclosure does not provide adeq uate shielding. If the I/O cables are external
to the enclosure, shielded cables should be used, with the shields grounded both to the enclosure and to the
host controller.
SCSI Interface Product Manual
(volume 2), part number 77738479.
2.1.1.1Electromagnetic susceptibility
As a component assem bly, the drive is not required to me et any suscep tibility perform ance requi rements. It is
the responsibility of those integrating the dri ve within their systems to perform t hose t ests req uired a nd des i gn
their system to ensure that equipm ent operating in the same system as the drive or external to the system
does not adversely affect the perf ormance of the drive. S ee Section 5.1.1 and Table 1, DC power requirements.
2.2Electromagnetic compliance
Seagate uses an independen t laboratory to confirm com pliance to the directives/standard(s) 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:
• 486, Pentium, and PowerPC microprocessors
• 3.5-inch floppy disc drive
• Keyboard
• Monitor/display
• Printer
• External modem
•Mouse
Although the test system with this Seagate m odel com pli es to the direct ives/standard(s), we cannot guarantee
that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance
and provide CE Marking and C-Tick 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 Electromagnet ic
Compatibility Directive 89/336/EEC of 03 M ay 198 9 as amended by Directive 92/31/EEC of 28 April 1992 a nd
Directive 93/68/EEC of 22 July 1993.
Page 14
4Elite 47 Product Manual, Rev. A
Australian C-Ti ck
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).
ANSI small computer system interface (SCSI) document numbers:
X3.131-1994SCSI-2
X3.253-1995SCSI-3 Parallel Interface
Package Test SpecificationSeagate P/N 30190-001 (under 100 lb.)
Package Tes t Spe cificationSeagate P/N 30191-001 (over 100 lb.)
In case of conflict between this document and any referenced document, this document takes precedence.
(Volume 2)Seagate P/N 77738479
Seagate P/N 83329290
Page 15
Elite 47 Product Manual, Rev. A5
3.0General description
Elite 47 drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read
channel electronics, embedded servo technology, and a SCSI-3 (Fast-20) interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.
Fast-20 (also known as Ultra SCSI) is a negotiated transfer rate. This transfer rate will occur only if your host
adapter also supports Fast-20 data transfer rates. This drive also operates at SCSI-1 and SCSI-2 data transfer
rates for backward compatibility with non-Fast-20 capable SCSI host adapters.
This manual describes the Elite 47 model ST446452W. It has a 68-pin interface connector for a 16-bit data b us.
The drive records and recovers data on 5.25-inch (133.4 mm) non-removeable discs.
The drive supports the S mall Computer System Interface (SCSI) as describ ed in the ANSI SCSI-2 interface
specifications to the extent described in this manual (volume 1), which defi nes the product perform ance characteristics of the Elite 47 family of drives, and the
77738479, which describes the general interface characteristics of this and other families of Seagate SCSI
drives.
The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and
automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets
(logical block addressing is used).
The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a nonreplaceable filter to maintain a contamination-free HDA environment.
SCSI Interface Product Manual
(volume 2), par t number
Refer to Figure 2 for an exploded view of the drive. This exploded view is for information only—never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, med ia, actuator, etc.) as this
requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.
Elite 47 drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibi lity of
destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone
when power is removed.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and handling. The shipping lock automati cally diseng ages when power is appli ed t o the drive and
the head load process begins.
Elite 47 drives decode track 0 location data from the servo data embedded on each surface to eliminate
mechanical transducer adjustments and related relia bilit y con ce rns.
A high-performance actuator assembly with a low-inertia, balanced, pa tented, straight-arm design provides
excellent performance with minimal power dissipation.
Page 16
6Elite 47 Product Manual, Rev. A
Figure 2.Elite 47 family drive
3.1Standard features
Elite 47 drives have the following standard features:
• Integrated SCSI controller
• Single-ended SCSI drivers and receivers
• 16-bit I/O data bus
• Asynchronous and synchronous data transfer protocols
• Firmware downloadable using the SCSI interface
• Programmable drive capacity
• Selectable sector size from 512 to 4,096 bytes per sector
• Programmable sector reallocation scheme
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (post format)
• Reed-Solomon error-correction code for header and data fields; can correct up to 64-bit error
• Sealed head and disc assembly (HDA)
• No preventative maintenance or adjustment required
• Dedicated head landing zone
• Embedded servo data rather than a separate servo data surface
• Self-diagnostics performed when power is applied to the drive
• 1:1 interleave
• Zone bit recording (ZBR)
• Vertical, horizontal, or top-down mounting
Page 17
Elite 47 Product Manual, Rev. A7
• Dynamic spindle brake
• Active IC terminators enabled by jumper
• 4,096 Kbyte data buffer . See Section 4.5
3.2Media characteristics
The media used on the dri ve has a diamet er of approximately 5.25 i nc hes (134 mm). The aluminum subst rate
is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.
3.3Performance
• Supports industry-standard Fast-20 SCSI interface (also called “Ultra SCSI”)
• Programmable multi-segmentable cache buffer
• 5,357 RPM spindle; average latency = 5.60 msec
• Command queuing of up to 64 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
• Low audible noise for office environment
• Low power consumption
3.4Reliability
• 800,000 hour MTBF
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Incorporates industr y -standa rd Self-Monitoring, Analysis and Repor ting Technology (S.M.A.R.T.)
• Incorporates Seek To Improve Reliability algorithm (STIR)
3.5Unformatted a n d formatted capacities
Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per
sector. The following table shows standard OEM model capacities:
Formatted [1]Unformatted
ST44645247.0 Gbytes [2]62.6 Gbytes
Notes.
[1]Standard OEM models a re formatted to have 512-byte sectors. Users having the necessar y equipment
may modify the data block size before issuing a f ormat command and obtain different formatted capacities
than those listed. User available capacity depends on spare reallocation scheme selected. See Mode
Select Command and Format Command in the
SCSI Interface Product Manual,
part number 77738479.
[2]The number of data tracks per sparing zone and the number of alternate sectors (LBAs) per sparing zone
can be determined by using the Mode Sense command and reading Mode page 03h.
3.6Programmable drive capacity
Using the Mode Select command, the drive can change its capacity to something less than maximum. See
Table 5.2.1-13 in the
SCSI Interface Product Manual
, part number 77738479 . Refer to the Parameter list block
descriptor number of blocks field. A value of zero in the number of blocks field indicat es that the dri ve will not
change the capacity it is currently formatted to have. A number in the number of blocks field that is less than
the maximum number o f LBAs chan ges the tot al drive capacity to the value in the block de scriptor num ber of
blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.
3.7Factory installed accessories
Elite 47 Installation Guide
The
, part num ber 83329290, is shipped with each standard OE M drive (unless otherwise specified). A small bag of jumpers are also s hipped with the dr ive. Use these jumpers to configure the
option headers. See Section 8.1.
SCSI terminators can be enabled or disabled.
Page 18
8Elite 47 Product Manual, Rev. A
3.8Options (factory installed)
All options that a cus t om er m ay request are i nc orporated during production or packaged at the manufacturing
facility before shipping. Some of the options available are:
• The capacities shown in Section 3.5. You can order other capacities by selecting other sparing schemes and
sector sizes.
• Single-unit shipping pack. The drive normally ships in bulk packaging to provide maximum protection against
transit damage. Units shipped i ndividually require additional protection as provided by the si ngle-unit shipping pack. Specify this option if you are planning to ship single units to your customers.
•The
3.9Accessories (user installed)
The following accessories are available.
• Single-unit shipping pack.
Elite 47 Installation Guide
Additional copies may be ordered.
, part number 83329290, is usually included wi th each standard OEM dr ive.
Page 19
Elite 47 Product Manual, Rev. A9
4.0Performance characteristics
4.1Internal drive characteristics (transparent to user)
4.2SCSI seek performance characteristics (visible to user)
Refer to Section 9.10 and to the
SCSI Interface Product Manual
(part number 77738479 ) for additional timing
details.
4.2.1Access time
Including controller overhead
(without disconnect) [1] [4]
Drive level
ReadWrite
ms
AverageTypical [3]13.214.2
Single trackTypical [3]1.32.3
Full strokeTypical [3]28.228.2
4.2.2Format command execution time (for ≥ 512-byte sectors)
Maximum (with verify)10.0 hours
Maximum (no verify)6.0 hours
4.2.3General performance characteristi cs
Minimum sector interleave1 to 1
Data buffer data transfer rate to/from disc media (one 512-byte sector) variable with zone/cylinder:
Minimum[4]125 Mbits/sec
Maximum[4]185 Mbits/sec
SCSI interface data transfer rate (asynchronous) [5]:
Maximum instantaneous (1-byte-wide transfer rate)5. 0 Mbytes/sec [6]
Maximum instantaneous (2-byte-wide transfer rate)10. 0 Mbytes/sec [7]
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI):
16 bit data bus5.0 to 40 Mbytes/sec
[] All notes for Sections 4.2 are listed at end of Section 4.2.3.
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10Elite 47 Product Manual, Rev. A
Synchronous transfer rate for fast SCSI-2:
16 bit data bus5.0 to 40 Mbytes/sec
Sector sizes:
Default512-byte data blocks
Variable in even-sector sizes512 to 4,096 bytes per sector
Read/write consecutive sectors on a trackYes
Flaw reallocation performance impact :
For flaws reallocated at format time using spare
sectors per track reallocation schemenegligible
For flaws reallocated after format time using spare
sectors per cylinder reallocation scheme11.1 msec (minimum)
22.2 msec (maximum)
For flaws reallocated after format time using spare
tracks per volume reallocation scheme35 msec (typical)
Overhead time for head switch (512-byte sectors)
in sequential mode0.8 msec
Overhead time for one track cylinder switch
in sequential mode1.2 msec (typical)
Aver age rotational latency5.60 msec
Notes for Sections 4.2.
[1]Execution time is 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).
[2]Maximum times are specified over the worst case conditions of temperature, voltage margins and dr ive
orientation. When comparing specified access times, take care to distinguish between typical access
times and maximum access times. Obtain the best comparison by conducting system benchmar k tests
under identical conditions. Maximum times do not include error recovery.
[3]Typical acce ss times are meas ured under nom inal conditions of tempe rature, voltage, and horizontal ori-
entation as measured on a representative sample of drives.
[4]Assumes no errors and no sector reallocations.
[5]Rate measured from the start of the first sector transfer to or from the host.
[6]Assumes system ability to support the 1-byte-wide transfer rate listed and no cable loss.
[7]Assumes system ability to support the 2-byte-wide transfer rate listed and no cable loss.
Page 21
Elite 47 Product Manual, Rev. A11
4.3S tar t/st op time
Disabling the Motor Start option causes the drive to become ready within 45 seconds after DC power is applied
at nominal voltage. This means the motor starts as soon as power is applied. If a recoverable error condition is
detected during the start sequence, the drive will execute a recovery procedure and may cause the time to
become ready to exceed 45 seconds. During this time the drive responds to some commands over the SCSI
interface. Stop time is less than 40 seconds from removal of DC power.
Enabling the Motor Start option causes the internal controller to accept the commands listed in the
face Product Manual
command, the drive becomes ready for normal operations within 45 seconds (excluding an error recovery procedure). The Motor Start command can also b e used t o comm and t he drive to stop the spindle in less than 40
seconds (see the Start/Stop com man d informat ion in the
There is no power control switch on the drive.
4.4Prefetch/multi-segmented cache control
The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many
cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when
it is used in “cache” operat ions. To sele ct prefetch and cache features the hos t sends the Mo de Select command with the proper values in the applicable bytes in Mode Page 08h (see
Prefetch and cache operation are in dependent features from the standpoin t that eac h is enabled and disabled
independently via the Mode Select command. However, in actual operation the prefetch f eature o verlaps cache
operation somewhat as is noted in Section 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 Table 7.
4.5Cache operation
Of the 4,096 Kbytes physical buffer space, approximately 3,442 Kbytes can be used as a cache. The cache
can be divided into logical segments (M ode Select page 08h, byte 13) from which data is read and to wh ich
data is written.
The drive keeps track of the logical block addresses of the data stored in each segment of the cache. If the
cache is enabled (see RCD bit = 0 in Mode page 08h, byte 2, bit 0 in the
requested by the host with a read command is retrieved from the cache, if possible, before any disc access is
initiated. If cache operation is not enabled, the buffer (still segmented with required number of segments) is still
used, but only as circular buffer segments during disc medium read operations (disregarding P refetch 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. On a cache “miss,” all data transfers to the host are in accordance with “buffer-full” ratio
rules. On a cache “hit,” the drive ignores the “buffer-full” ratio rule s. See explanations a ssocia ted with Mode
page 02h (disconnect/reconnect control) in the
(77738479) less than 3 secon ds after applying DC power. After receiving the Motor Star t
SCSI Interface Product Manual).
SCSI Interface Product Manual
SCSI Interface Product Manual),
SCSI Interface Product Manual
.
SCSI Inter-
data
).
The following is a simplified description of a read operation with cache operation enabled:
Case A - Read command is received and the first logical block is already in the cache.
1. Drive transfers to the initiator the first logical block requested plus all subsequent contiguous logical blocks
that are already in the cache. This data may be in multiple segments.
2. When a requested logical block is reached that i s not in a ny segment , the drive fetches it and any remaining requested logical block addresses from the disc and puts them in a segm ent of the cache. The dr ive
transfers the remaining requested logical blocks from the cache to the initiator in accordance with the
“buffer-full” ratio specification given in Mode Select Disconnect/Reconnect parameters, page 02h (see the
SCSI Interface Product Manual).
3. The drive prefetches additional logical blocks contiguous to those transferred in step 2 above and stores
them in the segme nt. The drive stops filling the segment when the maximum p refetch value has been
transferred (see the
SCSI Interface Product Manual).
Page 22
12Elite 47 Product Manual, Rev. A
Case B - Read command is received and the first logical block address requested is not in any segment of the
cache.
1. The drive fetches the reques ted logical blocks from the disc and transfers them into a s egm ent, then from
there to the initiator in accordance with the “buffer-full” ratio specification given in Mode Select Disconnect/
Reconnect parameters, page 02h (see the
2. The drive prefetches additional logical blocks contiguous to those transferred in Case A, step 2 above and
stores th em in the segm ent. The drive s tops filling the segment wh en the maximum prefetch value has
been transferred.
During a prefetch, the drive crosses a cylind er bound ary to fetch data only if the Dis continuity (DISC) bit is s et
to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4 (see the
SCSI Interface Product Manual)
.
SCSI Interface
Product Manual).
Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of which is
an integer number of disc medium sectors. The wrap-around capability of the individual segments greatly
enhances the buffer’s ov erall performance as a cache storage, allowing a wide range of user selectable configurations, which includes their use in the prefetch operation (if enabled), even when cache operation is disabled
(see Section 4.5.2). The number of segm ents may be selected using the Mode Select com mand, but the size
cannot be directly selected. Size is selected only as a by-product of selecting the segment number specification. The size in Kbytes of each segment is not reported by the Mode Sense command page 08h, bytes 14 and
15. These bytes read 0xFF FF, rega rdless of the num ber of seg ments setting. If a size spec ification is se nt by
the host in a Mode S elect comm and (bytes 14 and 1 5) no n ew segment size is set up by the dr ive, and 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 unchangeable parameters (see
integer number of segments from 1 to 16. Divide the 3,442 Kbytes in the buffer by the number of segments to
calculate the segment size. The default is three segments.
SCSI Interface Product Manual).
The dr ive support s operation of any
4.5.1Caching write data
When the WCE (Write Cache Enable) bit is enabled, the drive uses a dr ive buffer storage area where the data
to be written to the drive is stored in one or more segments while the drive performs the Write command. The
write cache uses the same buffer space and segmentation as the read cache. The buffer segmentation
scheme is set up or changed independently, having nothing to do with whether or not read and write caching is
enabled or disabled.
If a 10-byte CDB write command (2 Ah) is iss ued wi th the DPO (Dat a Page Out) bit set to one, no wri te data is
cached but the cache segm ents are still checked and cleared (if nee ded) for any logical blocks that are being
written.
When a write command is issued, 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 exceeds 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. Howev er, the drive does not overwrite data that has not
yet been written to the disc.
Table 7 shows Mode default settings for the drives.
Note.The WC E bit is disabled by default on OEM drives. To enable the WCE bit, change Mode Sense Page
08h, byte 2, bit 2 to a value of 1.
4.5.2Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc i mmediately beyond that which
was requested by a read command can be retrieved and stored in the buffer for immediate transfer from the
buffer to the host on subsequent read comman ds 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.” Prefetch is enabled using Mode Select page 08h,
byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched
replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize
Page 23
Elite 47 Product Manual, Rev. A13
system performance. The max prefetch field (bytes 8 and 9) limits the am ount of prefetch. The drive does not
use the prefetch “ceiling” field (byt e s 10 and 11).
During a prefetch operation, the drive crosses a cylinder bo undary to fetch more data only if the Di scontinuity
(DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.
Whenever prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA
(Adaptive Read Look-Ahead). If the host uses software interleave, A RLA enables prefetch of contiguous blocks
from the disk when it senses t hat a prefetch “hit” w ill l ikely occu r, even if two consecutive read operations were
not for phy sically contiguous bloc ks of data (e .g. “software interleav e”). ARLA disables prefetch when it decides
that a prefetch “hit ” w ill not likely o ccur. If the h ost is not using software int er leave, and if two sequenti al re ad
operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read operations request contiguous blocks of data, ARLA keeps prefetch enabled.
Page 24
Page 25
Elite 47 Product Manual, Rev. A15
5.0Reliability specifications
The following reliability specifications assume correct host/drive operational interface, including all interface
timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).
8
Seek errorsLess than 10 in 10
Read error rates [1]
Recovered dataLess than 10 errors in 10
Unrecovered dataLess than 1 sector in 10
Miscorrected dataLess than 1 sector in 10
MTBF800,000 hours
Serv ic e life5 years
Preventive maintenanceNone required
Note.
[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 specification assume the following:
• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).
• The drive has been formatted with the SCSI format commands.
• Errors caused by media defects or host system fail ures are excluded from error rate computations. Refer to
Section 7.0, “Defect and Error Management.”
• Data is random.
seeks
11
bits transferred (OEM default settings)
14
bits transferred (OEM default settings)
21
bits transferred
5.1.1Environmental interference
When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance
of the drive within the system is c onsidered acceptable if the dri ve doe s not generate an unrecoverable condition.
An unrecoverable error, or condition, is defined as one that:
• is not detected and corrected by the drive itself;
• is not capable of being detected from the error or fault status provided through the drive or SCSI interface; or
• is not capable of being recovered by normal drive or system recovery procedures without operator intervention.
5.1.2Read errors
Before determination or measurement of read error rates:
• The data that is to be used for measurement of read error rates must be v erifi ed as being written correctly on
the m edia.
• All media defect induced errors must be excluded from error rate calculations.
5.1.3Write erro rs
Write errors can occur a s a result of media defects, environmental interference, or equipment malfunc tion.
Therefore, write errors are not predictable as a function of the number of bits passed.
If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified
as a failure affecting MTBF. Unrecoverable write errors are those which cannot be corrected within two
attempts at writing the record with a read verify after each attempt (excluding media defects).
Page 26
16Elite 47 Product Manual, Rev. A
5.1.4Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. There should not
8
be more than 10 recoverable seek errors in 10
physical seek operations. After detecting an initial seek e rror,
the drive automatically performs an e rror recovery proces s. If the error recovery proce ss fails, a seek positioning error (15h) is reporte d with a Medium (3h) or Hardware error (4h) repor ted in the Sense Key. This is an
unrecoverable seek error. Unrec overable seek errors are classified as failures for MTBF calculations. Refer to
Section 5.1.1.4 of
SCSI Interface Product Manual
(part number 77738479).
5.2Reliability and service
You can enhance th e reliability of Elite 47 disc drives by ensuring that the drive receives adequate cooling.
Section 6.4.1 provides temperature measurements and other information that may be used to enhance the service life of the drive. Section 8.3.1 provides recommended air-flow information.
5.2.1Mean time between failure
The production disc drive has a mature MTBF of 800,000 hours. MTBF includes failures in the time period from
manufacturing installation to the end of product life.
The mean time between failure target is specified as device power-on hours (POH) for all drives in service per
failure using the following equation:
MTBF =
Estimated power-on hours (POH) in the period
Number of failures in the period
MTBF is based on the following assumptions:
• 8,760 power-on hours per year.
• 250 average on/off cycles per year.
• Read/seek/write operation 20% of POH.
• Operations at nominal voltages.
• Systems provide adequate cooling to ensure the case temperatures specified in Tab le 2 and Figure 4 are not
exceeded. Short ter m excursions up to the specification limits of the operating environment will not affect
MTBF performance.
A S.M.A.R.T. predictive failure indicates that the drive is deteriorating to an imminent failure and is considered
an MTBF hit.
Drive failure means any stoppage or substandard performance caused by drive malfunction.
Data is calculated on a rolling average base for a minimum period of six months.
Field failure rate vs time
The maximum allowable field failure rate is listed below. Drive utilization will vary . An estimated range of utilization is:
• 720 power-on hours (POH) per month.
• 250 on/off cycles per year.
• Read/seek/write operation 20% of POH.
• Systems provide adequate cooling to ensure the case temperatures specified in T ab le 2 and Figure 4 are not
exceeded. Short ter m excursions up to the specification limits of the operating environment will not affect
MTBF performance.
Failure rate in parts per million
The failure rate is calculated as follows:
• No system-induced failures counted.
• Parts per million (PPM) targets include 30% no defect found and 0% handling failures.
• Based on 800,000 MTBF and 720 POH per month.
Page 27
Elite 47 Product Manual, Rev. A17
• Month 1 rate includes a 300 PPM installation failure factor.
No routine scheduled preventive maintenance shall be required.
5.2.3Service life
The drive has a useful service life of 5 years. Depot repair or replacement of major parts is permitted during the
lifetime (see Section 5.2.4).
5.2.4Servi c e philosophy
Special equipment is required to repair the drive HDA. To achieve the 5-year service life, repairs must be performed only at a properly equipped and staffed service and repair facility. Troubleshooting and repair of PCBAs
in the field is not recommended because of the extensive diagnostic equipment required for effective servicing.
Also, there are no spare parts available for this drive. The drive warranty is voided if the HDA is opened.
5.2.5Service tools
No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.4.
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not
practical because users cannot purchase individual par ts for the drive.
Page 28
18Elite 47 Product Manual, Rev. A
5.2.6S.M.A.R.T.
S.M.A.R.T. is an acronym for Self-Monitor ing Analysis and Re por ting Technology. This tec hnology is intended
to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to
allow data back-up before an actual failure occurs.
Note.The firmware will monitor specific attributes for degradation over time but cannot predict instantaneous
drive failures.
Each attribute has been selecte d to m onitor a spec ific s et of failure conditions in th e operat ing pe rformanc e of
the drive, and the thresholds are optimized 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 bit and the PERF bit of the “Informational
Exceptions Control Mode Page” (1Ch). The DEXCPT bit i s used to e nable or disable the S.M.A.R.T. process.
Setting the DEXCPT bit will disable all S.M.A.R.T. functions. When enabled, S.M.A.R.T. will collect on-line data
as the drive performs normal read/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.
The process of measuring of f-line attributes and saving data can be forced by the RTZ command. Forcing
S.M.A.R.T. will reset the timer so that the next scheduled interrupt will be two hours.
The drive can be interrogated by the host to determine the time remaining before the next scheduled measurement and data logging process will occur. This is accomplished by a log sense command to log page 0x3E.
The purpose is to allow the customer to control when S.M.A.R.T. interruptions occur. As described above, forcing S.M.A.R.T by the RTZ command will reset the timer.
Performance impact
S.M.A.R.T. attribute data will be saved to the disc for the purpose of recreating the events that caused a predictive failure. The drive will measure and save parameters once every two hours subject t o an idle period on the
SCSI bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable and
the maximum delay is summarized below:
Maximum processing delay
On-line only delayFully enabled delay
S.M.A.R.T. delay times100 millisecond s800 m il liseconds
Repor tin g c on t rol
Reporting is controlled in the “Informational Exceptions Control Page” (1Ch). Subject to the reporting method,
the firmware will issue to the “host” an 01-5D00 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 e rrors occ ur an d s ig nals a predictive failure if the rate of degraded error
rate increases to an unacceptable level. To deter m ine rate, error events are logged and compared to the num ber 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 Inter val
Counter.
S.M.A.R.T. measures error rate, hence for each attribute the occurrence of an “error” is 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 simply 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 t he number of errors and the interval. If the number of errors exceeds the threshold
before the interval expires, then the error rate is considered to be unacceptable. If the number of errors does
not exceed the threshold before the interval expires, then the error rate is considered to be acceptable. In either
case, the interval and failure counters are reset and the process starts over.
Page 29
Elite 47 Product Manual, Rev. A19
Predictive failures
S.M.A.R.T. signals predi ctive failures when the drive is p erforming unacceptably for a period of t ime. 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 whenever the error rate is unacceptable and decremented (not to exceed
zero) whenever the error rate is acceptable. Should the counter continually be incremented 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.
5.2.7Product warranty
Beginning on the date of s hipment to custom er and con tinuing for a period of t ime specified i n the Standard
Term s and Conditions of Purchase for Seagate products, Seagate warrants that each product (including components and suba ssemblies) or spare part that fails to function properly under normal use due to defect in
materials on workmanship or due to nonconformance to the applicable specifications will be repaired or
replaced, at Seagate’s option and at no charge to customer, if returned by customer at customer’s expense to
Seagate’s designated facility in accordance with Seagate’s W arranty Procedure. Seagate will pay for transporting the repair or replacement item to customer. For more detailed warranty information, refer to the Standard
Term s and Conditions of Purchase for Seagate products.
Shipping
When transpor ting or shipping a drive, a Seagate approved container must be us ed. Keep your original box.
They are easily identified by the Seagate App roved Packag e label. Shipping a drive in a non-approved container voids the drive warranty .
Seagate repair centers may refuse recei pt of components improper ly packaged or obviously dam aged in transit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping
by an air-ride carrier experienced in handling computer equipment.
Product repair and return information
Seagate customer service cent ers 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.
Page 30
Page 31
Elite 47 Product Manual, Rev. A21
6.0Physical/electrical specifications
This section provides information relating to the physical and electrical characteristics of Elite 47 drives.
6.1AC power requirements
None.
6.2DC power requirements
The voltage and current requirements for a single drive are shown in the following table. V al ues indicated apply
at the drive’s power connector. The power requirements for single-ended models includes the internal disc
drive SCSI I/O termination. Current values are in Amperes.
T able 1:DC power requirements
ST446452W
Notes
Voltage+5 V [8] +12 V
Regulation[5]±5%±5%[2]
Maximum operating current DC3σ[1]1.01.8
Maximum starting current
Peak DC DC3σ
Peak AC AC3σ
[3]
[3]
Delayed motor start (max) DC3σ[1] [4].85.1
Peak operating current
Typical DCX
Maximum DC3σ
[1] [7]
[1]
Maximum (peak) AC3σ
Track following at
OD DCX
ID DCX
[1]
[1]
Read Track
OD DC3σ
[1] [10]1.0
AC3σ
Seeking
Typical DCX
Maximum DC3σ
[1] [9]
[1]
Maximum (peak ) AC3σ
Single-ended
1.04.8 [6]
5.12
.98
1.0
1.1
.97
.96
1.6
1.8
2.8
1.5
1.8
1.7
1.1
.96
1.0
1.1
1.9
1.95
2.1
2.8
Notes.
[1]Measured with average reading DC ammeter. Instantaneous +12 V current peaks will exceed these val-
ues.
[2]A drop of –10% is permissible during initial start of spindle, and must return to ±5% before 5,357 rp m is
reached. The ±5% must be maintained after the drive signifies that its power-up sequence has been com-
pleted and that the drive is able to accept selection by the host initiator.
[3]See +12 V current profile in Figure 3.
[4]This condition occurs when the Motor Star t Option is enabled and the drive has not yet received a Start
Motor co mmand.
[5]See Section 6.2.1, “Conducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise,
and transient response.
[6]At power-up, the motor current regulator limits the 12 volt current to an average value of less than the
value given here, although instantaneous peaks may exceed this value. These peaks should measure 5
msec duration or less.
[7]Operating condition is defined as a third-stroke seek at OD and Read One track. A command is issued
every 0.067 seconds.
[8]No terminator power supplied to terminators by drive.
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22Elite 47 Product Manual, Rev. A
[9]Seeking is defined as a third-stroke seek at OD. A command is issued every 20 msec.
[10] Read track is defined as repeat reads of track 15 with a duty cycle of 63%.
General Notes from Table 1:
1. Minimum current loading for each supply voltage is not less than 4% of the maximum operating current
shown.
2. The +5 and +12 volt supplies shall employ separate ground returns.
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.
6.2.1Conducted noise immunity
Noise is specified as a per iodic and random distri bution of frequencies covering a band from DC t o 10 MHz.
Maximum allowed noise values given below are peak to peak measurements and apply at the drive power connector.
+5 V =150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz.
+12 V =150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz.
6.2.2Power sequencing
The drive does not req uire power sequencing. T he dr ive protects against ina dvertent wr iting duri ng power-up
and down. Daisy-chain operation requires that power be maintained on the terminated device to ensure proper
termination of the per ipheral I/O cables. To automatically delay motor star t based on the target ID (SC SI ID),
enable the Spinup Delay option (install jumper) and disable the Start Command option (remove jumper) on the
J4B connector. See Section 8.1 for pin selection information. To delay the motor until the drive receives a Start
Unit command, enable the Enable Motor Start option on the J4B connector.
6.2.312 V current profile
Figure 3 identifies the drive +5 V and +12 V current profile. The current during the various times is as shown.
T0
T1
Peak
AC
T2
Nominal
(average)
+12V
Current
(amps)
6
5
4
3
2
1
0
0510152025
Figure 3.Typi cal Elite 47 drive +5 V and +12 V current profile
T3
T4
Minimum
AC
Time (seconds)
T5
30354045
T6
50
T0 -Power is applied to the drive.
T1 -Controller self-tests are performed.
T2 -Spindle begins to accelerate under current limiting after performing drive internal diagnostics. See
Note 1 of Table 1.
Page 33
Elite 47 Product Manual, Rev. A23
T3 -The spindle is up to speed and the head-arm restraint is unlocked.
T4 -Heads move from the landing zone to the data area.
T5 -The adaptive calibration sequence is performed.
T6 -Calibration is complete and the drive is ready for reading and writing.
Note.All times and currents are typical. See Table 1 for maximum current requirements.
6.3Power dissipation
ST446452W
Typical operating random read power dissipation is 24 watts (82 BTUs per hour) of DC power average at nominal voltages.
6.4Environment al limi ts
Temperature and h umi dity values experienced by the drive must be s uch th at con dens ation do es not oc cur on
any drive part. Altitude and atmospheric pres sure 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 drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range with
a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the
temperatures at the locations specified i n Table 2 are not exceeded. Air flow may be needed to achieve
these temperature values. Operation at c ase temperatures above these values may adversely affect the
drives ability to meet specifications.
The MTBF specification for the drive is based on operating at an ambient temperature of 86°F (30°C).
Occasional excursions to drive ambient te mperatures of 122°F (50°C) or 4 1°F (5°C) may occur without
impact to specified MTBF. To achieve the specified M TBF, the enclosure for the drive should be designed
such that the tem perature values of Table 2 are not exceeded. Air flow may be needed to a chieve these
temperatures. See Section 8.3.1. Continual or sustained operation at ca se temperatures above these values may degrade MTBF.
To confir m that the required cooli ng for the drive electronics and HDA is provided, place the drive in its final
mechanical configuration, perform random write/read operations and, after the temperatures stabilize, measure the case temperature of the components listed on the next several pages.
Operation of the drive at the maximum case temperature is intended for short time periods only. Continuous
operation at the elevated temperatures will reduce product reliability.
[1]The air-flow pattern with which the typical case temperature gu idelines were generated is shown in
Figure 9. Local average air velocities were 200 lfpm and inlet air tem perature to the drive was 86°F
(30°C).
[2]The maximum case temperatures are calculated and may not reflect actual operating values. Sufficient
cooling air may be required to ensure that these values are not exceeded.
[3]Measure HDA temperature at point labeled “HDA Temp. Checkpoint” on Figure 4.
[4]PCB mounted integrated circuit case.
ST446452W Drives
3
2
.50"
HDA Temp.
Check Point
4
1
HBAJ
.75"
Figure 4.Location of PCBA components listed in Table 2
Page 35
Elite 47 Product Manual, Rev. A25
b. Non-operating
Non-operating temperature should remain between –40° to 158° F (–40° to 70°C) package ambient with a
maximum gradient of 36°F (20°C) per hou r. This assumes that the drive is packaged in the shippin g container designed by Seagate.
6.4.2Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
5% to 90% non-condensing relative humidity with a maximum gradient of 10% per hour.
b. Non-operating/transit
5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.
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 +12,210 meters)
6.4.4Shock and vibration
Shock and vibration limits specified in this document are measured directly on the drive. If the drive is installed
in an enclosure to which the stated shock and/or vibration cr iteria is applied, resonances m ay occur interna lly
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 5, and in accordanc e with the restrictions of Section 8.4. Orien tation of the
side nearest the LED may be up or down.
6.4.4.1Shock
a. Operating—normal
The drive, as installed for normal operation, will operate erro r-free while subjected to intermittent shock not
exceeding 2.0 g at a maximum duration of 11 msec (half sinewave). Shock may be applied in the X, Y, or Z
axis.
b. Operating—abnormal
Equipment, as installed for nor mal operation, does not incur physical damage while subjected to inte rmittent shock not exceeding 10 g at a maximum duration of 11 msec (half sinewave). Shock occurring at
abnormal levels may promote degraded operational performance dur ing 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 two times per second.
c. Non-operating
The limits of non-operating shock applies to all conditions of handling and transportation. This includes both
isolated drives and integrated drives.
The drive subjected to non-repetitive shock not exceeding 50 g at a maximum duration of 11 msec (half sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z
axis.
d. Packaged
Disc drives shipped as loose load (not p alletized) general freight will be packaged to w ithstand 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).
Page 36
26Elite 47 Product Manual, Rev. A
Package SizePackaged/Product WeightDrop Height
<600 cu in (<9,800 cu cm)Any60 in (1,524 mm)
600-1,800 cu in (9,800-19,700 cu cm)0-20 lb (0-9.1 kg)48 in (1,219 mm)
>1,800 cu in (>19,700 cu cm)0-20 lb (0-9. 1 kg)42 in (1,067 mm)
>600 cu in (>9,800 cu cm)20-40 lb (9.1-18.1 kg)36 in (914 mm)
Z
Y
X
X
Z
Y
Figure 5.Recommended mounting
Page 37
Elite 47 Product Manual, Rev. A27
6.4.4.2Vibration
a. Operating—normal
The drive, as installed for normal operation, complies with the complete specified p erformance while subjected to continuous vibration not exceeding:
5-300 Hz @ 0.5 g (X, Y, or Z axis)
b. Operating—abnormal
Equipment, as installed for normal operation, does not incur physical damage while subjected to periodic
vibration not exceeding:
5-300 Hz @ 0.75 g (X, Y, or Z axis)
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 recov e ry routines are a vailable .
c. Non-operating
The limits of non-operating vibration a pply to all conditions of handling and transpor tation. This includes
both isolated drives and integrated drives.
The drive does not incur physical damage or degraded performance as a result of cont inuous vi bration not
exceeding:
The drive is designed to operate in a typical office environment with minimal environmental control.
6.4.6Acoustics
Sound power during idle shall be 4.6 bels typical when measured to ISO 7779 specification. No prominent
tones are allowed.
6.4.7Electromagnetic susceptibility
See Section 2.1.
6.5Mechanical specifications
The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions
of the front panel are shown in the figure below. Refer to Figure 6 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.”
TypicalMaximum
Height:3.25 in (82.6 mm)3.268 in (83.0 mm)
Width:5.75 in (146.1 mm)5.76 in (146.3 mm)
Depth:8.0 in (203.0 mm)8.01 in (203.5 mm)
Weight:7.0 pounds (3.17 kilograms)–
Page 38
28Elite 47 Product Manual, Rev. A
[3]
L
F
JK
H
G
[1]
Notes:
Mounting holes two on each side,
[1]
6-32 UNC. Max screw length into
side of drive 0.17 in. (4.318 mm).
Mounting holes four on bottom,
[2]
D
A
E
[2]
C
B
[4]
6-32 UNC. Max screw length into
bottom of drive 0.18 in. (4.572 mm).
Power and interface connections.
[3]
Decorative front panel.
[4]
InchesMillimeters
±
±
±
±
±
±
±
±
±
±
±
0.010
0.010
0.010
0.020
0.010
0.005
0.010
0.010
0.010
0.020
0.020
8.000
A
5.750
B
2.875
C
2.950
D
3.120
E
0.860
F
5.500
G
0.125
H
3.120
J
2.950
K
3.240
L
203.20
145.05
73.02
54.93
79.25
21.84
139.70
2.17
79.24
74.93
82.30
.25
±
.25
±
.25
±
.50
±
.25
±
.13
±
.25
±
.25
±
.25
±
.50
±
.50
±
Figure 6.Mounting configuration dimensions
Page 39
Elite 47 Product Manual, Rev. A29
7.0Defect and error management
The drive, as deliv ered, c omplies with this product manual. The read error rate and specified storage capacities
are not dependent on using defect management routines by the host (initiator).
Defect and error management in the SCSI system involves the drive internal defect/error managem ent and
SCSI systems error considerations (errors in communications between initiator and the drive).
7.1Drive internal defects and 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 primar y defects list (referred to as the “P” list and also as the EFT
defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place
on the medium and the loc ation listed in the defects reallocation table. The “P” list is not 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 using the
Read Defect Data command (see Section 5.2.1.2 in the
77738479).
7.2Drive error recovery procedures
Whenever an error occurs during drive operation, the d rive, if programmed to do so, performs error recovery
procedures to attempt to recover the data. The error recovery procedures used depend on t he options previously set up in the error recovery parameters mode page. Error recovery and defect management may involve
the use of several SCSI commands, the details of which are descr ibed in the
The drive implements selectable error recovery time limits such as are required in video applications. For additional information on this, refer to Table 5.2.1-22 in the
Mode Select/Mode Sense Error Recovery parameters.
SCSI Interface Product Manual,
SCSI Interface Product Manual.
SCSI Interface Product Manual
which describes the
part number
The error recovery scheme supported by the drive provides a means to control the total error recovery 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 via the Recovery T ime Lim it bytes in the Error Recover y Mo de
Page. The total amount of time spent in error recovery for a single LBA can be limited via the Read Retry Count
or Write Retry Count bytes in the Error Recovery Mode Page.
The drive firmware error recovery algorithms c onsist of 16 levels for read recoveries and 12 levels for writes.
Each level may consist of multiple steps, where a st ep is defined as a recovery function involving a single reread or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the Read and
Write Retry Counts.
Table 3 equates the Read and Write Retr y 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, if reallocations
are performed. The ARRE b it enables/ disables reallocations, but if the RC bit is one, it takes p recedenc e over
ARRE to disable auto reallocation. When the drive has read all of the c alled for data, it does not go back and
reallocate any sectors of erroneous data that were not reallocated because the RC bit was one. The drive does
not report an unrecovered error when RC is one.
Page 40
30Elite 47 Product Manual, Rev. A
Table 3:Read and write retry count maximum recovery times
[1]Setting these retry c ounts to a value below the default setting could result in degradation of the unrec ov-
ered error rate below the product specification.
For example, suppose the read/write recovery page has the RC bit = 0, the read retr y c oun t set t o 4, and
the recovery time limit set to 456. A four block read command can take up to 197 msec recovery time for
each block and a maximum of 456 msec recovery time for all four blocks . If either of these limits is reached
and a block has not yet be en recovered, the co mmand wil l end w ith CHECK C ONDITION status and an
unrecoverable read error will be reported.
Page 41
Elite 47 Product Manual, Rev. A31
8.0Installation
The first thing to do wh en installing a dr ive is to set the drive ID (sele ct) on the SCSI bus and set up cer tain
operating options. This is usually done by installing small shorting jumpers on the pins of connectors J01, J4A,
and J4B on the PC B. Som e us ers c onn ec t cables to the jumper headers and perform the set-up u sing rem ote
switches.
If your sys tem is “SCAM” (SCSI Confi gured A ut o Magically ) complia nt, the syst em assign s the driv e ID ov er the
interface, so there is no need to be concerned ab out drive ID. Setting the drive ID jumpers doe sn’t hur t anything, but is not necessary.
If your system is not “SCAM” compliant, you do need to set the drive ID using the ID jumpers.
Configure drive options
For option jumper locations and definitions refer to Figures 7 and 8. Drive default mode parameters are not normally needed for installation. Refer to Section 9.3.2 for default mode parameters if they are needed.
• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7.
ID 7 is the highest priority on both 8 and 16 bit data buses.
• If multiple devices are on the bus, set the drive SCSI ID to one that is not presently used by other devices on
the bus.
• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Permanently installed terminators must be enabled on the drive using jumper plug TE if termination is not provided by the host equipment.
• If the drive is attached to a bus that contains other devices and the ne w drive is not attached to the end of the
bus, the Terminator Enable jumper (TE) should be removed from the new drive.
Note.For additional information about terminat or requirement s, refer to Sections 9.8 and 9.9.
• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after
power has been applied, recycle the drive power to make the new settings effective.
• Installation instructions are provided by host system document ation or with any additiona lly purchased drive
installation software. If necessary, see Section 10.0 for Seagate support services telephone numbe rs.
• Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as
the manufacturer labels contain information required when ser vicing the product.
Formatting
• It is not necessary to low level format this drive. The drive is shipped from the factory low level formatted in
512-byte sectors.
• Reformat the drive if a different spare sector allocation scheme is selected.
• High level f ormatting the drive involves assigning one or more partitions or logical drives to the drive volume.
Follow the instructions in the system manuals for the system into which the drive is to be installed.
8.1Dri ve ID/optio n select heade r
Figures 7 and 8 show views of the drive ID select and option select jumper connectors. The notes following the
figures describe the functions of the various jumper positions on the connectors J01, J4A, and J4B.
Page 42
32Elite 47 Product Manual, Rev. A
J4A
Pin 1
SCSI ID = 0 (default)
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = Ah (10)
SCSI ID = Bh (11)
SCSI ID = Ch (12)
SCSI ID = Dh (13)
SCSI ID = Eh (14)
SCSI ID = Fh (15)
Write Protect Enabled (WP)
Terminator Power Option (TP)
Internal terminator power source.
External terminator power source.
Internal terminator and drive
power to I/O.
Pin 1
Spinup Delay Option (DS)
Pin 1
Immediate spinup (if the Start Command
option jumper is disconnected)
Spinup delay equal to the SCSI Bus ID
multiplied by 12 seconds (if the Start
Command option jumper is disconnected).
Start Command Option (ME)
Start spindle according to the Spinup
Delay option jumper.
Start spindle after the SCSI Bus sends
a Start Unit command.
SCSI Bus Parity Check (PD)
Check the parity of data bytes read from
the SCSI Bus.
Ignore parity check.
Pin 2
Pin 1
J01
J4B
Pin 1
Pin 3
J4B
J4A
Pin 4
J01
J01
Pin 2
Pin 1
Pin 1
Pos. B
J4B
Pos. A
Pos. 2
Pos. 1
Pin 4
Pin 3
Reserved
Figure 7.Option select jumper connectors
Page 43
Elite 47 Product Manual, Rev. A33
Pin 1
J4A
J01
J6
SCSI I/O
Connector
DC Power
Connector
J4B
Pin 1
Pin 18
J4A
Pin 16
Pin 1
Pin 15Pin 17
Reserved
Active LED Connector
Fault/Ready LED Connector
Active
Fault
Ready
Note: On some LEDs the flat
side of indicator is cathode.
CATH
CATH
CATH
Figure 8.J4A connections fo r Activity, Fault, and Ready LED indicators
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34Elite 47 Product Manual, Rev. A
8.1.1Notes for Figure 8
Notes explaining the functions of the various jumpers on jumper header conn ectors J01, J4A and J4B are
given here. The term “default” means as standard OEM uni ts are configured wit h a jum per on thos e positions
when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is inst alled. OFF or ON
underlined is factory default condition.
Function description of configuration jumpers
J4A jumpersJumper function description
, A2, A1, A
A
3
SCSI ID jumpers. Drive ID address on the SCSI bus from 0 to 15 established by these
0
jumpers as shown. Default is Drive ID = 0. ID = 7 is highest priority which is usually the
SCSI host adapter. Priorities go ID7 to ID0, then ID15 to ID8.
WP
OnEntire drive is write protected.
OffDrive is not write protected. (Default)
TE
OnOn-board (non-removable) terminator circuits are enabled. (Default)
OffOn-board (non-removable) terminator circuits are disabled.
J4B Jumpers
DSME
OffOffSpindle starts immediately after power up. (Default)
OffOnSpindle does not star t until a Star t Unit command is rec eived from the host.
OnOffStartup is delayed by SCSI ID times 12 seconds after power is applied. For example:
Drive with SCSI ID of 0 starts the spindle immediately when DC power is connected,
drive with SCSI ID of 1 starts after a 12-second delay, drive with SCSI ID of 2 starts
after 24-second delay, etc. Tolerance is plus 3 seconds, minus 0 seconds.
OnOnSpindle starts when the host sends a Start Unit command. Delayed s tart feature is over-
ridden and does not apply when the ME jumper is ins ta lle d.
PD
OnSCSI parit y checking and parity error repor ting by the drive is disabled.
OffDrive checks for parity and reports the results of parity checking to host. (Default)
J01 Jumpers [1]
No jumpers onNo te rminator power is connected to the drive terminators or the SCSI bus I/O cable.
2-4Drive terminator power comes from SCSI bus.
1-3 and
2-4
Drive supplies terminator power to itself (internal connection) and to the SCSI bus I/O
cable.
1-2Terminator power is supplied from the drive’s internal power to the drive’s internal termi-
nators only.
[1]See Table 11 for the I/O connector (J6) pins used for Termpower.
Page 45
Elite 47 Product Manual, Rev. A35
8.2Dri ve orientati on
The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive performance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on
its side) orientations, and these are the two preferred mounting orientations.
8.3Cooling
Cabinet cooling must ensure that the ambien t temperature immediately surrounding th e drive will not exceed
temperature conditions specified i n Section 6.4.1. Specific consideration s hould be given to make sure adequate air circulation is present around the pr inted circuit board asse mbly (PCBA) to meet the requireme nts of
Section 6.4.1.
8.3.1Air flow
The rack, cabinet, or drawer en vironment for the drive must provide cooling of the electronics and the head and
disc assembly (HDA). You should c onfirm that adequate cooling is prov ided using the temperatu re measurement guidelines described below.
The drive should be oriented, or air flow directed, so that the least amount of air-flow resistance is created
while providing air flow to the electronics and HDA. Also, the shortest possible path between the air inlet and
exit should be chosen to minimize the travel length of air heated by the drive and other heat sources within the
rack, cabinet, or drawer environment.
Possible air-flow patterns are s hown i n F igure 9. T he air-flow patterns are c reated by one or more fans, either
forcing or drawing air as shown in th e illustrations. Other ai r-flow patter ns are acc eptable as long as the temperature measurement guidelines of Section 6.4.1 are met.
Figu re 9.Suggested ai r f low
Above unit
Über der Einheit
Under unit
Unter der Einheit
Note. Air flows in the direction shown (front to back)
or in reverse direction (back to front)
Hinweis. Luftstrom in der angezeigten Richtung
(von hinten nach vorne) oder in umgekehrter
Richtung (von vorne nach hinten)
Note. Air flows in the direction shown or
in reverse direction (side to side)
Hinweis. Luftstrom in der angezeigten Richtung oder in
umgekehrter Richtung (von Seite zu Seite)
Above unit
Über der Einheit
Under unit
Unter der Einheit
Page 46
36Elite 47 Product Manual, Rev. A
8.4Dri ve moun ting
Use the bottom or side mounting holes to secure the drive in the host enclosure.
8.5Grounding
Signal ground (PCBA) and HDA ground are connected t ogether in the dr ive and cannot be separated by the
user. The equipment in which the drive is mounted is conne cted direc tly to the HDA and PCBA with no el ectr ically-isolating shock mounts. If you do not want the system chassis to be connected to the HDA/PCBA ground,
you must provide a nonconductive (electrically -isolating) method o f mounting the drive in the host equipme nt.
Increased radiated emissions m ay result if you do not provide the maxi mum surface area ground connection
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.
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Elite 47 Product Manual, Rev. A37
9.0Interface requirements
This section describes Elite 47 interface requirements.
9.1General description
This section partially describes the in terface requireme nts as implemented on the dri ves. The m ajor portion
of the interface requirements/implementation is described in the
SCSI Interface Product Manual
number 77738479. This section has tables that give the Elite 47 family drive’s version of the SCSI implementation described in the
SCSI Interface Product Manual
.
9.2SCSI interface messages supported
Table 4 lists the messages support ed by the SCSI-2 and SCSI-3 modes of the Elite 47 family drives.
T able 4:SCSI messages supported by Elite 47 family drives
Supported by
Message NameMessage Code
SCSI-2
Abort06hY
Abort-tag0DhY
Bus device reset0ChY
Clear queue0EhY
Command complete00hY
Continue I/O process12hY
Disconnect04hY
Extended messages01h[1]Y
Identify80h-FFhY
Ignore wide residue (two bytes)23hY
Initiate re covery0FhN
Initiator detected error05hY
Linked command complete0AhY
Linked command complete with flag0BhY
Message parity error09hY
Message reject07hY
Modify data pointer[1]N
No operation08hY
Queue tag messages (two bytes)
Head of queue tag21hY
Ordered queue tag22hY
Simple queue tag20hY
Release recovery10hN
Restore pointers03hY
Save data pointer02hY
Synchronous data transfer req.[1]Y
Target transfer disable13hY
Terminate I/O process11hY
Wide data transfer request[1] Y
Notes.
[1]Extended message (refer to the
SCSI Interface Product Manual
, part number 77738479).
, part
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38Elite 47 Product Manual, Rev. A
9.3SCSI interface commands supported
Table 5 lists the SCSI interface commands that are suppor ted in the SCSI-2 and SCS I-3 modes of the dr ive.
OEM standard drives are shipped set to operate in SCSI-2/SC SI-3 mode. Elite family drives can be changed
back and forth between SCSI-1, SCSI-2, and SCSI-3 modes using the Change Definition command .
T able 5:Commands supported by Elite 47 family drive
Command
Command Name
Code [5]
Change definition40hY
Compare39hN
Copy18hN
Copy and verify3AhN
Format unit [1]04hY
Block formatN
Bytes from indexY
Physic al se cto r formatY
DPRY bit supportedY
DCRT bit supportedY
STPF bit supportedY
IP bit supportedY
DSP bit supportedY
IMMED bit supportedY
VSN
FUA bit supportedY
Write long3FhY
Write same41hY
XD read52 hY
XD write50hY
XP write51hY
Supported by
SCSI-2/3
[1]The drive can format to any even number of bytes per sector from 512 to 4,096.
[2]Supports 6-byte and 10-byte versions.
[3]Table 7 shows how individual bits are set which are changeable by the host.
[4]Warning: A power loss during flash programming can result in firmware corruption. This usually makes
the drive inoperable.
[5]58-59h not used.
5B-5Fh not used.
60-BFh not used.
C0-DFh not used.
E0-FFh not used.
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Elite 47 Product Manual, Rev. A41
9.3.1Inquiry data
Table 6 following lists the Standard Inquiry command data that the drive returns to the initiator per the fo rmat
given in the
T able 6:Elite 47 family dri ve Standard Inquiry data
The drive can be changed between these two configurations:
01 = SCSI-1 implemented.
02 = SCSI-2/SCSI-3 implemented (default is 02).
2
The drive can be changed between these two configurations:
[]
01 = Response data is in SCSI-1 format and has comp atibilit y with Comm on Com mand Set data.
02 = Response data is in SCSI-2/SCSI-3 format (default).
R# Four ASCII digits representing the last four digits of the product Fi rm ware Rele as e num ber. This informa-
tion is also given in the V ital Product Data pa ge C0h, t ogether with ser vo RAM and ROM rel ease numbers.
S# Eight ASCII digits representing the eight digits of the product serial number.
3
Bytes 18 through 24 reflect model of drive.
[]
4
[]
Copyright Year - changes with actual year.
9.3.1.1Inquiry Vital Product Data pages
Instead of the Standard Inquiry data shown in Table 6, the initiator c an request several Vital Product Data
pages by setting the Inquiry com mand EVPD bit to one. The
SCSI Interface Product Manual,
part number
77738479, section 5.1.1.3.1 list s the Vital Prod uct Data pages suppor ted and describes their formats. A separate Inquiry command must be sent to the drive for each Vital Product Data page the initiator wants the drive to
send back.
9.3.2Mode Sense data
The Mode Sense com mand provides a me ans for the drive to repor t its operating parameters to t he initiator.
The drive maintains four sets of m ode parameters: default values, saved values, current values and changeable values.
Default values are hard-coded in the drive firmware that is stored in flash EPROM n onvolatile memory on t he
drive PCB. Default values can be changed only by downloading a complete set of new firmware into the flash
EPROM. An initiator can reques t and receive from the dr ive a list of default values and us e those in a Mo de
Select command to set up new current and saved values, where the values are changeable.
Saved values are stored on the disk media using a Mode Select command. Only parameter values that are
allowed to be changed can be changed by this method. “Changeable values” are defined below. Parameters in
the saved values list that are not chan geable by the Mode Selec t command get t heir values from the default
values storage.
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42Elite 47 Product Manual, Rev. A
Current values are volatil e values currently being used by the drive to control its operation. A Mode Select command can be used to c han ge t hese values (only t hose t hat are c han geable). Or i ginally, they are installed from
saved or default values after a power on reset, hard reset, or Bus Device Reset message.
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” allows a change to a corresponding bit; a
“zero” allows no change. For e xample, in Table 7 refer to Mode page 01, in the first row titled “CHG.” These are
hex numbers representing the changeable values for Mode page 01. Note in col umns 1 and 2 (bytes 00 and
01), there is 00h, which indicates that in bytes 00 and 01 none of the bits are changeable. Note also that bytes
04, 05, 06, and 07 are not changea ble, because those fields are all zeros. In byte 02, hex value EF equates to
the binary pattern 1110 1111. If there were a zero in any bit position in the field, it means that bit is not changeable. Bits 7, 6, 5, 3, 2, 1, and 0 are changeable, because those bits are all ones. Bit 4 is not changeable. In this
particular example, it indicates 7 of 8 error recovery control bits are changeable. FF in column 4 indicates all
bits in byte 3 are changeable.
The changeable values list can only be changed by downloading new firmware into the flash EPROM.
On drives requiring unique saved values, the required unique saved values are stored into the saved values
storage location on the media pr ior to shipp ing the drive. Some dr ives may have unique firmware with uniq ue
default values also.
On standard OEM drives the saved values are taken from the default values list and stored into t he saved values storage location on the media prior to shipping.
When a dr ive is powered up, it takes saved values from the media an d st ores them to the current values storage in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select
command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition” status being returned.
Note.Becaus e there may be several different versions of drive control firmware in the total population of
drives in the field, the Mode Sense values given in the following tables may not exactly match those of
some drives.
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Elite 47 Product Manual, Rev. A43
The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages (see
SCSI Interface Product Manual,
part number 77738479).
Definitions:
SAV = Saved values are stored on the disk media using a Mode Sense command.
DEF = Default value; standard drives are shipped configured this way.
CHG = Chang eable bits; indicates if current and saved values are changeable.
Table 7:Mode Sense data, ST446452 default values (SCSI-2/3 implementation)
[1]Though byte 12, bit 7 is shown as changeable, the FSW function governed by that bit is n ot i mp lement ed
by this drive.
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44Elite 47 Product Manual, Rev. A
9.4SCSI bus conditions and miscellaneous features supported
Asynchronous SCSI bus conditions suppor ted by the drive are listed below. These conditions cause the SCSI
device to perform certain actions and can alter t he S CS I bus phase s equ enc e. Other miscel laneou s operating
features supported are also listed here. Refer to the
SCSI Interface Product Manual,
part number 77738479 for
details.
Table 8:SCSI bus conditions and other miscellaneous features
ESPConditions or feature
NAdaptive caching
YArbi trating system
YAsynchronous data transfer
YAsynchronous event notification
YAtt ention condition
YContingent allegiance condition
YCapacity programm ing
YDeferred error handling
NDifferential interface circuits available
YDisconnect/reconnect
YParameter rounding (controlled by the round bit in the Mode Select Page 0)
YQueue tagging (up to 64 queue tags supported)
YReporting actual retry count in e xtended sense byte s 15, 16 and 17
YReset condition
YSegm ented caching
Y
YSynchronous data transfer
NZero latency read
SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes (in
Table 5.2.1-25 of the
SCSI Interface Product Manual)
ESPStatus supported
YGood
YCheck conditi on
YCondition met/good
YBusy
YIntermediate/good
YIntermediate/condition met/good
YReservation conflict
YQueue full
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Elite 47 Product Manual, Rev. A45
9.5Synchronous data transfer
The data transfer period to be used by the drive and the initiator is established by an exchange of messages
during the Message P hase of operation. See the s ection on message protocol in the
SCSI Interface Product
Manual.
9.5.1Synchronous data transfer periods supported
Table 9 lists synchronous data transfer periods supporte d by the drive.
Table 9:Synchronous data transfer periods supported
M (Decimal)Transfer period (M times 4 nanoseconds)Transfer rate (mega transfers/second)
The maximum REQ/ACK value supported by Elite 47 SCSI drives is 15 (0Fh).
9.6Physical interface
Figure 10 shows the location s of the drive physical interface components. The locations of the DC power connector, the SCSI interface connector, and the drive select and option select headers are shown.
Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI
operational aspects of Seagate drive interfaces are provided in the
SCSI Interface Product M anual,
part num -
ber 77738479.
This section descri bes the connectors, cables, signals, terminators and bus t iming of the DC and SCSI I/O
interface. See Sections 9.8 and 9.9 for additional terminator information.
9.6.1DC cable and connector
The drive receives DC power through a 4-pin connector (see Figure 10 for pin assignm ents) mounted at the
rear of the main PCB. Recommended part numbers of the mating DC power connector are listed below, but
equivalent parts may be used.
Typ e of Cabl eConnectorContacts (20-14 AWG)
14 AWGAMP 1-480424-0AMP 60619-4 (loose piece)
AMP 61117-4 (strip)
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46Elite 47 Product Manual, Rev. A
J6
Pin 1
Pin
1
2
3
4
Pin 1
J6
SCSI I/O
Connector
Power
+12V
+12V ret
+ 5V ret
+ 5V
J15 DC Power
4321
DC Power
Connector
Pin 1
Figure 10.Physical interface
Page 57
Elite 47 Product Manual, Rev. A47
9.6.2SCSI interface physical description
The drives may be daisy-chained together or with other compatible SCSI devices. Both ends of the cable must
be terminated. The drives implement single-ended drivers and receivers. All signals are common between all
SCSI devices. The drive may be daisy-chained only with SCSI devices having the same type drivers and
receivers. Devices having single-ended interface circuits cannot be on t he sam e daisy chain with devices having differential interface circuits. A maximum of 16 SCSI devices (including the host) may be daisy-chained
together. However , please note the restrictions described in Section 9.6.3 about the number of devices allowed
in a daisy chain. The SCSI devices at both ends of the daisy chain are to be terminated. Inter mediate SCSI
devices shall not be term inated (see Fig ure 11). To disable termination, rem ove the terminat or enable jumper
TE on J4A select header, not the terminator power source selector jumper TP on J01 (Figure 7).
9.6.3SCSI interface cable requirements
In general, cables having the characteristic impedances given in Section 9.6.3.1 are not available; however,
impedances that are somewhat lower are satisfactory. A characteristic impedance as shown in Table 10 is recommended for unshielded flat or twisted pair ribbon cable. However, most available cables have a somewhat
lower characteristic impedance. To minimize discontinuances and signal reflecti ons, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness,
cable length, the number of loads, transfer rates, and cost to achieve satisfactory system operation. If you m ix
shielded and unshielded cables within the same SCSI bus, the effect of impedance mismatch must be carefully
considered. Proper impedance matching is especially important to maintain adequate margin at FAST and FAST
-20 (Ultra SCSI) transfer rates.
Elite 47 drives use non-shielded cable connectors. Use a 68-conductor flat cable or 34 twisted pair cable with
connectors listed in 9.6.4.1. Use a minimum conductor size of 28 AWG to minimize noise effects.
Suggested non-shielded flat cable part numbers are:
The maximum total cable length allowed depends on several factors. Table 10 lists the maximum lengths
allowed for different configurations of drive usage. These values are from the ANSI SCSI-3 Fast-20 (also called
Ultra SCSI) specification X3T10/1071D. All device I/O lines must have equal to or less than 25 pf capacitance
to ground, measured at the beginning of the stub.
Table 10:Cable characteristics for single-ended circuits
T ransmission line imped ance
REQ/ACKOther signals
[1]The spacing of devices on the mainline SCSI bus should be at least three times the stub leng th (defined
below) to avoid clustering (Refer to Annex C of X3T10/1071D). Based on this criteria, it may be that 8
devices will not actually work on 1.5 meters of line ( .1 x 3 x 7 = 2.1 meters).
A stub length of no more than 0.1 meter (0.33 foot) is allowed off the main line interconnection with any connected equipment. The stub length is measured from the transceiver to the connection to the mainline SCSI
bus.
Single-ended I/O pin assignments are shown in Table 11.
9.6.4Mating connectors
Part numbers for connectors that mate with the various Elite 47 I/O connectors are given in the sections following.
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48Elite 47 Product Manual, Rev. A
9.6.4.1Mating connectors for ST446452W models
Use a non-shielded 68-conductor cable connector consisting of two rows of 34 male contacts with adjacent
contacts 0.050 inch (1.27 mm) apart.
Recommended mating wide connector par t numbers are:
Amp Model 786096-7Female, 68-pin, panel mount
Amp Model 786090-7Female, 68-pin, cable mount
Amp Model 749925-5(.050 inch conductor centers, 28 or 30 AWG wire)
Use two, 34 conductor, .050 inch center flat cable with this connector. This type connector can only be used on cable ends. [1]
Amp Model 88-5870-294-5W/O Strain Relief (.025 inch conductor centers, 30 AWG wire).
Use either on cable ends or in cable middle section for daisy-chain
installat ions. [1]
Amp Model 1-480420-0Power connector 4 circuit housing
Berg 69307-01212-position, 2 x 6, 2 mm receptacle housing
[1]See Figure 11.
The drive device connector is a non-shielded 68-conductor connector consisting of two rows of 34 female pins
with adjacent pins .050 inch apart. The connector is keyed by means of its shape (see Figure 12).
“W” Model
Drive
SCSI ID 1
[6]
[5]
2 through X SCSI devices[3]
[1]
[1]
SCSI ID 0
Note:
Do not mix
“W” and “WD”
model drives
on the daisy chain.
(check your adapter
for Pin 1 location)
Pin 1
Host Adapter
SCSI ID 7 [4]
[1]
PCB
[2]
[1]Open-end type (in-line application) connector used. Term inators disabled.
[2]Host need not be on the end of the daisy chain. Another device can be on the end with the terminator, the
host having no terminator.
[3]Total interface cable length must not exceed that specified in Section 9.6.3.1 (including host adapter/initia-
tor). The number of devices allowed depends on data transfer rate. See Table 10.
[4]SCSI ID7 has highest arbitration priority. Priority is ID 7 to ID 0, then ID 15 to ID 8. (ID 8 has the lo west pri-
ority).
[5]Last drive on daisy chain.
[6]If end device, external terminator and closed-end type 68-pin connector used. Install terminator enable
(TE) jumper plug.
Figure 11.SCSI daisy-chain interface cabling
Page 59
Elite 47 Product Manual, Rev. A49
Position 1
2X .050
(2.060)
Figure 12.Non-shielded 68-pin SCSI device connec tor
2X R .125
(.197)
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50Elite 47 Product Manual, Rev. A
T able 11:Single-ended wide cable assignmen ts for ST446452W drives
[1]See Section 9.7.1 for detailed electrical characteristics of these signals.
[2]The conductor number refers to the conductor position w hen using 0.025-inch (0. 635 mm) cent erline flat
ribbon cable. Other cable types may be used to implement equivalent contact assignments.
[3]Connector contacts are on 0.050 inch (1.27 mm) centers.
[4]“NC” means no connection.
[5]The conductor number refers to the conductor position (right to left in Figure 11) when using 0.050 i nch
(1.27 mm) centerline flat ribbon cable. Other cable types may be used to impl ement equivalent contact
assignments.
[6]Connector contacts are on 0.100 inch (2.54 mm) centers.
[7]8 bit devices which are connected to the 16 data bit differential I/O shall leave the following signals open:
All other signals shall be connected as defined.
[8]GND provides a means for differential de vices t o detect the presence of a single-ended device on the bus.
[9]A hyphen preceding a signal name indicates that the signal is active low.
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52Elite 47 Product Manual, Rev. A
9.7Electrical descr iption
ST446452W models use single-ended interface signals. These signals must be terminated with 110-ohm
active termination circuits at each end of the total cable. Single-ended circuits use open collector or three state
drivers. All of these models can be configured to provide the SCSI termination.
9.7.1Single-ended drivers/receivers
Typical single-ended driver and receiver circuits are shown in Figure 13. Use terminator circuits only where the
disc drive is first or last in the daisy chain. See Note 1 following Figure 13.
Transmitter characteristics
Single-ended drives use an ANSI SCSI compatible open collector single-ended driver. This driver is capable of
sinking a current of 48 mA with a low level output voltage of 0.4 volt.
Receiver characteristics
Single-ended drives use an ANSI SCSI single-ended receiver with hysteresis gate or equivalent as a line
receiver.
Line Driver
Transmitter
(or transceiver)
[2]
Figure 13.Single-ended transmitters and receivers
TP
[4]
+2.85V+2.85V
110
[1]
Ohm
Flat
Cable
Pair
[5]
[3]
Line Receiver
TP
[4]
[1]
Receiver
110
Ohm
[2]
Notes.
[1]Part of active terminator circuits. Non-removabl e LSI terminators, enabled in the drive with jumper plug TE
when it is the first or last in the daisy chain.
[2]ANSI SCSI compatible circuits.
[3]Total interface cable length should not exceed that specified in Section 9.6.3.1.
[4]Source of drive terminator power is an active circuit which has an input source voltage selected by jumper
plug TP. See Figure 7.
[5]Interface signal levels and logical sense at the drive I/O connector are defined as follows:
Vil (low-level input voltage) = 1.0 V maximum (signal true); minimum = Vss – 0.5 V.
Vih (high-level input voltage) = 1.9 V minimum (signal false); maximum = Vdd +0.5V.
Vihys (Input Hysteresis) = 425 mV minimum
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Elite 47 Product Manual, Rev. A53
9.8Terminator requirements
Internal disc drive I/O termination consists of active circuits contained i n an LSI module that is perm anently
mounted on the P CB. All single initiator/single target (non-daisy -chain) applications require you to ter minate
the initiator and drive.
Term ina te both ends of the SCSI bus with ANSI SCSI-2 stand ard alternative 2 (active) termination. Do not mix
active and passive terminators on the same SCSI bus.
Daisy-chain configurations require you to terminate only the units at each end of the daisy chain. Do not terminate any other peripherals on the chain.
Note.Remove the Enable SCSI Terminator (TE) jumper from J4A pins 19 and 20 whe n termi nators are not
required.
9.9Terminator power
You can configur e termi nator power i n four different ways. Se e Section 8.1 for illust rations tha t show how to
place jumpers enabling each of the following terminator power configurations:
1. Drive accepts terminator power through SCSI bus pins 17, 18, 51, and 52.
2. Drive supplies power to the SCSI bus.
3. Drive provides power to its own terminators and to the SCSI bus terminator power line.
SCSI devices providing terminator power (TERMPWR) must have the following characteristics:
V TERM = 4.50 V to 5.25 V
800 mA minimum source drive capability
1.0 A maximum
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54Elite 47 Product Manual, Rev. A
9.10Disc drive SCSI timing
T able 12:Disc drive SCSI timing
Description
Waveform
symbol [1]
Waveform
table [1]Typical timingMaximum timing
Target select time (no arbitration)T00N/A<1 µs<250 µs
Target select time (with arbitration)T014.5-1,22.31 µs2.36 µs
Target select to commandT024.5-13.33 µs3.34 µs
Target select to MSG outT034.5-21.51 µs1.54 µs
Identify MSG to commandT044.5-33.34 µs3.36 µs
Command to statusT054.5-5Command dependent Command dependent
Command to data (para. in)T064.5-9Command dependent Command dependent
Command to data (para. out)T074.5-10Command dependent Command dependent
Command to data (write to data
T084.5-10Command dependent Command dependent
buffer)
Command to disconnect MSGT094.5-6Command dependent Command dependent
Disconnect MSG to bus freeT104.5-6,140.64 µs0.68 µs
Disconnect to arbitration (for reselect)
T114.5-6–bCommand dependent Command dependent
This measures disconnected CMD
overhead.
Target win arbitration (for reselect)T124.5-72.8 µs
Arbitration to reselectT134.5-71.8 µs
Reselect to identify MSG inT144.5-71.34 µs
Reselect identify MSG to statusT154.5-8Command dependent Command dependent
Reselect identify MSG to data (media) T164.5-11Command dependent Command dependent
Data to statusT174.5-15Command dependent Command dependent
Status to command complete MSGT184.5-5,8,151.0 µs
Command complete MSG to bus freeT194.5-5, 8,150.75 µs
Data to save data pointer MSGT204.5-144.5 µs
Save data pointer MSG to
T214.5-140.75 µs
disconnect MSG
Command byte transferT224.5-40.04 µs
Next command byte access4.5-4
Next CDB byte access (byte 2 of 6)T23.6.24.5-40.55 µs0.56 µs
Next CDB byte access (byte 3 of 6)T23.6.34.5-40.10 µs0.10 µs
Next CDB byte access (byte 4 of 6)T23.6.44.5-4 0.09 µs0.10 µs
Next CDB byte access (byte 5 of 6)T23.6.54.5-40.13 µs0.14 µs
Next CDB byte access (byte 6 of 6)T23.6.64.5-40.13 µs0.14 µs
Next CDB byte access (byte 2 of 10)T23.10.24.5-40.59 µs0.60 µs
Next CDB byte access (byte 3 of 10)T23.10.34.5-40.14 µs0.14 µs
Next CDB byte access (byte 4 of 10)T23.10.44.5-40.13 µs0.14 µs
Next CDB byte access (byte 5 of 10)T23.10.54.5-40.12 µs0.12 µs
Next CDB byte access (byte 6 of 10)T23.10.64.5-40.11 µs0.12 µs
Next CDB byte access (byte 7 of 10)T23.10.74.5-40.10 µs0.10 µs
Next CDB byte access (byte 8 of 10)T23.10.84.5-40.09 µs0.10 µs
Page 65
Elite 47 Product Manual, Rev. A55
Description
Waveform
symbol [1]
Waveform
table [1]Typical timingMaximum timing
Next CDB byte access (byte 9 of 10)T23.10.94.5-40.13 µs0.14 µs
Next CDB byte access (byte 10 of 10) T23.10.104.5-40.12 µs0.12 µs
Data in byte transfer (parameter)T244.5-120.04 µs
Data out byte transfer (parameter)T254.5-130.04 µs
Next data in byte access (parameter)T264.5-120.10 µs0.12 µs
Next data byte out access (parameter) T274.5-130.10 µs0.12 µs
Data in byte transfer (media) [2]T284. 5-120.03 µs0.04 µs
Data out byte transfer (media) [2]T294.5-130.03 µs0.04 µs
Next data in byte access (media) [2]T304.5-120.10 µs0.12 µs
Next data out byte access (media) [2] T314.5-130.10 µs0.12 µs
MSG IN byte transferT324.5-5,7,
0.09 µs0.04 µs
4.5-8,14,15
MSG OUT byte transferT334.5-20.04 µs
STA TUS byte transf erT344.5-5,8,
0.04 µs
4.5-15
Synchronous data transfer
characteristics:
Request signal transfer period [3]––various800 ns
Notes.
[1]See the
SCSI Interface P roduc t Manual,
part number 777 38479, Section 4.5.
[2]Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3.
[3]Synchronous Transfer Period is determined by negotiations between an Initiator and a Dri ve. The Drive is
capable of setting periods as given in Section 9.5. See al so Sections 3.1.5.2 and 3.5.3.2 of th e
Interface Produc t Manual,
part num ber 77738479, for a description of synchronous dat a transfer opera-
SCSI
tion.
Page 66
Page 67
Elite 47 Product Manual, Rev. A57
10.0Seagate technical support services
If you need assistance installing your drive, consult your dealer. Dealers are familiar with their unique system
configurations and can hel p you with s ystem conf li cts an d other technical iss ues. If you nee d additional assistance with your Seagate
listed below.
SeaFONE® 1-800-SEAGATE
Seagate’s 800 number (1-800-732-4283) allows toll-free access to automated self-help services, providing
answers to commonly asked questions, troubleshooting tips, and specifications for disc drives and tape drives.
This service is available 24 hours daily and requires a touch-tone phone. International calle rs can reach this
automated self-help service by dialing 408-456-4496.
Online services
Using a modem, you can obtain troubleshooting tips, free utility programs, drive specifications and ju mpe r settings for Seagate’s entire product line. You can also download software for installing and analyzing your drive.
SeaNET
You can obtain techn ical information about Seagate produ cts over the Internet from Seagate’s World Wide
Web home page (http://www.seagate.com) or Seagate’s ftp server (ftp://ftp.seagate.com). You can also
send E-mail with your questions to DiscSupport @ Seagate.com or TapeSupport @ Seagate.com.
Seagate CompuServe forum
Online technical suppor t for Seagate products is available on CompuSer ve. To acces s our technical support
for u m, ty p e
can type questions or browse through previous questions and answers on the fo rum mess ages.
SeaBOARD
SeaBOARD is a com puter bulletin board system that contain s informa tion about Seagate disc a nd tape dr ive
products and is available 24 hours daily. Set your communication s software to eight data bits, no parity, a nd
one stop bit (8-N-1).
™
go seagate
®
®
drive or other Seagate products, use one of the Seagate technical support services
. This forum provides information similar to that found on SeaBOARD. In addition, you
You can use a touch-tone telephone to access Sea gate’s automated FAX system to receive technical suppor t
information by return FAX . This serv ice is available 24 hours daily.
USAPlease dial 1-800-SEAGATE or 408-456-4496 for the specific product telephone number.
A.M
(8:00
. to 1:15 P.M., 2:30 P.M. to 7:00 P.M., Central time, M–F)
).
SeaTDD™ 405-936-1687
Using a telecommunications device for the deaf (TD D), you can send q uestions or comment s 24 hours daily
A.M
and exchange messages with a technical suppor t specialist between 8:00
P.M
6:00
. (Central time) Monday through Friday.
. to 12:15 P.M. and 1:30 P.M. to
Customer service centers
Seagate direct OEM, Distribution, and Systems Integrator customers should contact their Seagate service representative for warranty information. Other customers should contact their place of purchase. Seagate offers
comprehensive customer support for all Seagate drives. These services are available worldwide.
LocationPhone numberFAX number
Asia Pacific and Australia65-485-359565-488-7503
Europe, Middle East, and Africa31-2031-6730031-2065-3432 0
Japan81-3-5462-290481 -3 -5462-2979
USA1-800-468-3472405-949-6740
Other Americas (Brazil, Canada, Mexico)405-949-670640 5-949-6738
Manufacturer’s representatives
Brazil
MA Informatica55-21-516-664955-21-516-5280
Canada
Memofix
Adtech
Mexico
Abicom Seamax SA DE CV525-546-4888525-546-4888
Southern Europe
Caesar Italia39-688-1814939-688-02103
905-660-4936
905-812-8099
1-800-624-9857
905-660-8738
905-812-7807
Page 69
Elite 47 Product Manual, Rev. A59
Index
Numerics
12 V current profile 22
9
44
40
27
38
11
7
12
39
44
38
40
37
37
5
44
44
37
47
35
4
21
39
5
47
13
44
11
3rd party reserve
A
abort
SCSI message
abort-tag
SCSI message
AC power requirements
access time
acoustics
actual retry count bytes
actuator
actuator assembly
adaptive caching
adaptive read look-ahead
air cleanliness
air flow
altitude
ambient temperature
ANSI SCSI documents
arbitrating syste m
asynchronous data transfer
asynchronous event notification
attention condition
Australia/New Zealand Standard
auto write and read reallocation
automatic shipping lock
CDB
CE Marking
certifications
change definition command
changeable values
characteristics
check condition status
clear queue
SCSI message
command complete
SCSI message
command queuing
commands
interface
compare command
condition met/good status
configuration jumpers, function
configure drive options
connector
non-shielded 68-pin
contingent allegiance condition
continue I/O process
SCSI message
control mode page
controller
cooling
copy and verify command
copy command
C-Tick Marking
current
16, 23, 35
operating
profile, 12 V
values
6
7
3
42
3
38
21
9
38
3
11
9
22
12
42
37
37
7
38
37
39
38
44
31
39
44
49
38
38
D
daisy-chain interface cabling 48
34
9
38
7
12
9, 45
41
38
45
45
6
45
21
5, 6
31
data buffer
data page out
data rate
data transfer
data transfer period
data transfer protocols
date code page
DC cable and connector
DC power connector
DC power requirements
DCRT bit
dedicated landing zone
default
default mode parameter
default values
34
44
Page 70
60Elite 47 Product Manual, Rev. A
defect and error management 29
6
52
37
9
44
9
45
44
54
21
29
31
39
29
31
deferred error handling
delayed motor start
power requirements
38
38
40
31
38
38
5
31
27
31
4
36
31
35
description
devices
multiple
differential interface circuits available
dimensions
SCSI message
disconnect/reconnect
disconnect/reconnect comman d
documentation
DPO bit
DPRY bit
drive characteristics
drive default mode parameter
drive ID
drive ID select jumper connector
drive internal defects and errors
drive mounting
drive orientation
drive power
drive primary defects list
drive select headers
drive volume
drivers/receivers
single-ended
DS bit
DSP bit
DU bit
E
EFT defect list 29
29
3
29
52
23
39
6
21
16
15
15
27
3
electrical description
electrical specifications
electromagnetic interference (EMI)
electromagnetic susceptibility
EMC compliance
emissions
environmental interference
environmental limits
environmental requirements
error management
error rates
error recovery
error recovery page
error recovery process
error-correction code
errors
ETC bit
European Union requirements
extended messages
36
15
15, 16
38
15
44
39
39
37
SCSI message
extended sense
extent reservation
F
fan 35
Fast-20
features
field pointer bytes
firmware
firmware corruption
firmware download option
firmware numbers page
flash EPROM
flaw reallocation performance
format command execution time
format page
format unit command
formatted capacities
formatting
function description, configuration jumpers
5
6
miscellaneous
6
41
39
31
44
39
40
38
7
38
40
10
9
G
good status 44
ground
36
H
hardware error 16
HDA. See head and disc assembly
37
5, 6, 35
head and disc assembly
25
36
31
31
31
ground
head of queue tag
SCSI message
high level format
host adapter
host system
humidity
I
I/O circuits
38
47
7
29
37
37
38
39
37
37
38
single-ended
IC terminators
identified defect
identify
SCSI message
ignore w ide residue
SCSI message
IMMED bit
implemented operating definitions page
information exceptions control page
initiate re c ov e ry
reliability
speed
spindle
spindle brake
Standard Inquiry data
standards
start and stop commands
start unit/stop unit command
start/stop time
status supported
STIR algorithm
STPF bit
support services
supported diagnostics pages
synchronize cache command
synchronous data transfer
synchronous data transfer req.
synchronous transfer rate
9
7
periods supported
SCSI message
44
TSD bit
38
U
Ultra SCSI 5
39
15
7
38
unformatted capacities
unit attention page
unit serial number page
unrecoverable error
unrecoverable write errors