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Installation Manual
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Elite 23 Disc Drive
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ST423451N/W/WD
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Product Manual, Volume 1
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Table of Contents
Related Manuals for Seagate ST423451N
Summary of Contents for Seagate ST423451N
- Page 1 ..........ST423451N/W/WD .
- Page 3 ..........ST423451N/W/WD .
- Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Tech- nology, Inc. Elite, SeaFAX, SeaFONE, SeaNET, SeaTDD, and SeaBOARD are either trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other trade- marks or registered trademarks are the property of their respective owners.
- Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected 08/25/97 D. Ashby/B. Rathe This manual is volume 1 of a two-volume document with the SCSI interface information in the volume 2 SCSI Interface Product Manual , part number 77738479. If you need SCSI interface information, order the volume 2 SCSI Interface Product Manual , part number 77738479.
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Page 7: Table Of Contents
Elite 23 Product Manual, Rev. A Contents Scope ................1 Applicable standards and reference documentation. - Page 8 Seagate technical support services ........
- Page 9 ST423451N option select jumper connectors ........
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Page 11: Scope
Elite 23 Product Manual, Rev. A Scope This manual describes Seagate Technology®, Inc. Elite 23™ disc drives. Elite 23 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20) interface specifications to the extent described in this manual. The SCSI Interface Prod- uct Manual (part number 77738479) describes general SCSI interface characteristics of this and other families of Seagate drives. -
Page 13: Applicable Standards And Reference Documentation
Standards The Elite 23 family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SCSI Interface Product Manual (volume 2), part number 77738479. -
Page 14: Reference Documents
X3T10/1071D rev. 6 Fast-20 (also called “Ultra SCSI”) Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) In case of conflict between this document and any referenced document, this document takes precedence. -
Page 15: General Description
(volume 1), which defines the product performance char- acteristics of the Elite 23 family of drives, and the SCSI Interface Product Manual (volume 2), part number 77738479, which describes the general interface characteristics of this and other families of Seagate SCSI drives. -
Page 16: Standard Features
Elite 23 Product Manual, Rev. A Figure 2. Elite 23 family drive Standard features Elite 23 drives have the following standard features: • Integrated SCSI controller • Single-ended or differential SCSI drivers and receivers • 8-bit and 16-bit I/O data bus models available •... -
Page 17: Media Characteristics
Elite 23 Product Manual, Rev. A • Dynamic spindle brake • Active IC terminators enabled by jumper (“N” and “W” models only) • 2,000 Kbyte data buffer. See Section 4.5 • SCAM (SCSI Configured Auto Magically) Plug-n-Play Level 1 compliant. SCAM Level 2 is a factory-installed option. -
Page 18: Factory Installed Accessories
Elite 23 Product Manual, Rev. A Factory installed accessories The Elite 23 Installation Guide , part number 83329130, is shipped with each standard OEM drive (unless oth- erwise specified). A small bag of jumpers are also shipped with the drive. Use these jumpers to configure the option headers. -
Page 19: Performance Characteristics
Elite 23 Product Manual, Rev. A Performance characteristics Internal drive characteristics (transparent to user) ST423451 Drive capacity 29.4 Gbyte (unformatted) [1] Read/write heads Bytes/track 152,908 Bytes (average, unformatted) [1] Bytes/surface 1,051 Mbytes (unformatted) Tracks/surface, total 6,876 Tracks (user accessible) Tracks/inch 5,555 TPI Peak bits/inch 125,360 BPI... - Page 20 Elite 23 Product Manual, Rev. A Synchronous transfer rate for fast SCSI-2: 8 bit data bus models 1.25 to 10 Mbytes/sec 16 bit data bus models 2.5 to 20 Mbytes/sec Sector sizes: Default 512-byte data blocks Variable in even-sector sizes 512 to 4,096 bytes per sector Read/write consecutive sectors on a track Flaw reallocation performance impact:...
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Page 21: Start/Stop Time
Elite 23 Product Manual, Rev. A Start/stop 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. -
Page 22: Caching Write Data
Elite 23 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 requested logical blocks from the disc and transfers them into a segment, then from there to the initiator in accordance with the “buffer-full”... - Page 23 Elite 23 Product Manual, Rev. A system performance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not use the prefetch “ceiling” field (bytes 10 and 11). During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if the Discontinuity (DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.
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Page 25: Reliability Specifications
Elite 23 Product Manual, Rev. A Reliability 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). Seek errors Less than 10 in 10 seeks Read error rates [1] Recovered data... -
Page 26: Seek Errors
Elite 23 Product Manual, Rev. A 5.1.4 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. There should not be more than 10 recoverable seek errors in 10 physical seek operations. -
Page 27: S.m.a.r.t
Elite 23 Product Manual, Rev. A 5.2.6 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to allow data back-up before an actual failure occurs. -
Page 28: Product Warranty
Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty Procedure. Seagate will pay for transporting the repair or replacement item to customer. -
Page 29: Physical/Electrical Specifications
The voltage and current requirements for a single drive are shown in the following table. Values 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. Table 2: DC power requirements ST423451N/W ST423451WD Notes Single-ended Differential... -
Page 30: Conducted Noise Immunity
Elite 23 Product Manual, Rev. A 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% for narrow single-ended. General Notes from Table 2: 1. -
Page 31: Power Dissipation
All times and currents are typical. See Table 2 for maximum current requirements. Power dissipation ST423451N/W For drives with single-ended interface circuits, typical operating random read power dissipation is 24 watts (82 BTUs per hour) of DC power average at nominal voltages. -
Page 32: Figure 4. Location Of Pcb Components Listed In Table 3
The temperatures in Column 1 are calculated and may not reflect actual operating values. Sufficient cooling air may be required to ensure that these values are not exceeded. Measure HDA temperature at point labeled “HDA Temp. Checkpoint” on Figure 4. PCB mounted integrated circuit case. ST423451N Drives ST423451W Drives RYJX TYJX ST423451WD Drives . -
Page 33: Relative Humidity
Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details, refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 kg). -
Page 34: Elite 23 Product Manual, Rev. A
Elite 23 Product Manual, Rev. A Package Size Packaged/Product Weight Drop Height <600 cu in (<9,800 cu cm) 60 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) -
Page 35: Air Cleanliness
Elite 23 Product Manual, Rev. A 6.4.4.2 Vibration a. Operating—normal The drive, as installed for normal operation, complies with the complete specified performance while sub- jected to continuous vibration not exceeding: 5-300 Hz @ 0.5 g (X, Y, or Z axis) b. -
Page 36: Figure 6. Mounting Configuration Dimensions For "N" Models
Elite 23 Product Manual, Rev. A Notes: Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive 0.17 in. (4.318 mm). Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0.18 in. (4.572 mm). Power and interface connections. -
Page 37: Figure 7. Mounting Configuration Dimensions For "W" And "Wd" Models
Elite 23 Product Manual, Rev. A Notes: Mounting holes two on each side, 6-32 UNC. Max screw length into side of drive 0.17 in. (4.318 mm). Mounting holes four on bottom, 6-32 UNC. Max screw length into bottom of drive 0.18 in. (4.572 mm). Power and interface connections. -
Page 39: Defect And Error Management
Elite 23 Product Manual, Rev. A Defect and error management The drive, as delivered, complies 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 management and SCSI systems error considerations (errors in communications between initiator and the drive). - Page 40 Elite 23 Product Manual, Rev. A Table 4: Read and write retry count maximum recovery times Read retry Maximum recovery time Write retry Maximum recovery time count [1] per LBA (cumulative, msec) count [1] per LBA (cumulative, msec) 1256 2423 1178 12 (default) 3589 1845...
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Page 41: Installation
• Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary, see Section 10.0 for Seagate support services telephone numbers. • 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 servicing the product. -
Page 42: Figure 8. St423451N Option Select Jumper Connectors
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. Reserved Figure 8. ST423451N option select jumper connectors... -
Page 43: Figure 9A. St423451W/Wd Option Select Jumper Connectors
Elite 23 Product Manual, Rev. A Pin 2 Pin 4 Pin 1 Pin 1 Pin 15 Pin 3 Pin 1 SCSI ID = 0 (default) SCSI I/O SCSI ID = 1 Connector Pin 1 SCSI ID = 2 DC Power Pin 2 Pin 4 Connector... -
Page 44: Figure 9B. St423451 "Wd" Model Auxillary Remote Cable Id Select
Elite 23 Product Manual, Rev. A Pin 1 Pin 1 SCSI I/O SCSI ID = 0 (default) Connector SCSI ID = 1 Pin 1 DC Power SCSI ID = 2 Connector SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7 SCSI ID = 8*... -
Page 45: Figure 10A. J4A Connections For Activity, Fault, And Ready Led Indicators For All Models
Elite 23 Product Manual, Rev. A Pin 1 SCSI I/O Connector Pin 1 DC Power Connector Pin 18 Pin 16 Pin 1 Pin 15 Pin 17 Reserved Active LED Connector Fault/Ready LED Connector Terminator Enabled (TE) Reserved Active CATH Note: On some LEDs the flat Fault side of indicator is cathode. -
Page 46: Notes For Figures 8 Through 10B
Elite 23 Product Manual, Rev. A 8.1.1 Notes for Figures 8 through 10b Notes explaining the functions of the various jumpers on jumper header connectors J01, J4A and J4B are given here. The term “default” means as standard OEM units are configured with a jumper on those positions when shipped from factory. -
Page 47: Drive Orientation
Elite 23 Product Manual, Rev. A Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor- mance 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. -
Page 48: Drive Mounting
Elite 23 Product Manual, Rev. A Drive mounting No special drive mechanical mounting constraints are applicable to this drive. Grounding Signal ground (PCB) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCB with no electri- cally-isolating shock mounts. -
Page 49: Interface Requirements
Elite 23 Product Manual, Rev. A Interface requirements This section describes Elite 23 interface requirements. General description This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements /implementation is described in the SCSI Interface Product Manual , part number 77738479. -
Page 50: Scsi Interface Commands Supported
Elite 23 Product Manual, Rev. A SCSI interface commands supported Table 6 lists the SCSI interface commands that are supported in the SCSI-2 and SCSI-3 modes of the drive. OEM standard drives are shipped set to operate in SCSI-2/SCSI-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. - Page 51 Elite 23 Product Manual, Rev. A Table 6: Commands supported by Elite 23 family drive (continued) Supported by Command Name Command Code SCSI-2/3 Mode select (same pages as Mode Y [2] [3] Sense command, see below) Mode select (10) Mode sense Y [2] [3] Caching parameters page (08h) Control mode page (0Ah)
- Page 52 Elite 23 Product Manual, Rev. A Table 6: Commands supported by Elite 23 family drive (continued) Supported by Command Name Command Code SCSI-2/3 Search data equal Search data high Search data low Seek Seek extended Send diagnostics page Supported diagnostics pages Translate page Set limits Start unit/stop unit (start/stop spindle)
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Page 53: Inquiry Data
S# Eight ASCII digits representing the eight digits of the product serial number. Bytes 18 through 23 reflect model of drive. Shown here are hex values for Model ST423451N. For models “W” and “WD,” byte 24 is 57 (W), since these are wide data bus drives and that is the only fact the host needs to discover from byte 23. - Page 54 Elite 23 Product Manual, Rev. A 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 changeable by the Mode Select command get their values from the default values storage.
- Page 55 Elite 23 Product Manual, Rev. A The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com- mand 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;...
- Page 56 Elite 23 Product Manual, Rev. A Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SAV 1A 9A 0A 00 00 00 00 00 01 00 00 00 04 DEF 1A 9A 0A 00 00 00 00 00 01 00 00 00 04 CHG 1A 9A 0A 00 03 00 00 00 00 00 00 00 00 SAV 1C 9C 0A 00 04 00 00 00 00 00 00 00 01...
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Page 57: Scsi Bus Conditions And Miscellaneous Features Supported
Elite 23 Product Manual, Rev. A SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here. -
Page 58: Synchronous Data Transfer
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 Manual, part num- ber 77738479. -
Page 59: Figure 12. Physical Interface For "N" Model Drives
Elite 23 Product Manual, Rev. A Power +12V +12V ret + 5V ret + 5V 1 2 3 4 DC Power Connector Pin 1 SCSI I/O Connector Pin 1 Figure 12. Physical interface for “N” model drives Power +12V +12V ret + 5V ret + 5V Pin 1... -
Page 60: Scsi Interface Physical Description
Elite 23 Product Manual, Rev. A 9.6.2 SCSI 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 “N” and “W” model drives implement single-ended drivers and receivers. All signals are common between all SCSI devices. -
Page 61: Mating Connectors
Part numbers for connectors that mate with the various Elite 23 I/O connectors are given in the sections follow- ing. 9.6.4.1 Mating connectors for ST423451N model Use a non-shielded 50-conductor cable connector consisting of two rows of 25 female contacts with adjacent centers .100 inch apart. -
Page 62: Figure 14. Scsi Daisy-Chain Interface Cabling
Elite 23 Product Manual, Rev. A 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 16). “W”... -
Page 63: Figure 15. Non-Shielded 50-Pin Scsi Device Connector
Elite 23 Product Manual, Rev. A .600 (15.24) .200 Typ. .420 (5.08) (10.67) .256 Typ. Pin 1 (6.5) .025 Sq. Contact (0.64) 50 Places .326 (8.28) .100 (2.54) .100 Typ. 4X Ø .0825 ± .001 (2.54) (Ø 2.096 ± 0.025) 2.400 ±... - Page 64 Elite 23 Product Manual, Rev. A Table 12: Single-ended signal/contact assignments for ST423451N drives Connector Cable Connector Signal contact conductor contact Signal name [1] number [6] number [5] number [6] name [1] –DB0 –DB1 –DB2 –DB3 –DB4 –DB5 –DB6 –DB7 –DBP...
- Page 65 Elite 23 Product Manual, Rev. A Table 13: Single-ended wide cable assignments for ST423451W drives Connector Cable Connector Signal contact conductor contact Signal name [1] number [3] number [2] number [3] name [1] –DB12 –DB13 –DB14 –DB15 –DBP1 –DB0 –DB1 –DB2 –DB3 –DB4...
- Page 66 Elite 23 Product Manual, Rev. A Table 14: Wide differential P cable assignments (non-shielded connector) for ST423451WD drives Note. The minus sign next to the signal indicates asserted state is the low voltage of the two levels used for logic signals. Connector Cable Connector...
- Page 67 Elite 23 Product Manual, Rev. A Notes [ ] for Tables 12, 13, and 14: See Section 9.7.1 for detailed electrical characteristics of these signals. The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat ribbon cable.
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Page 68: Electrical Description
Elite 23 Product Manual, Rev. A Electrical description ST423451N and ST423451W 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. -
Page 69: Differential Drivers/Receivers
Elite 23 Product Manual, Rev. A 9.7.2 Differential drivers/receivers Typical differential driver and receiver circuits used by ST423451WD drives are shown in Figure 18. The drive has no provisions for terminator circuits on differential I/O drives. Differential signals All differential interface signals consist of two lines denoted +SIGNAL and –SIGNAL. A signal is true when +SIGNAL is more positive than –SIGNAL, and a signal is false when –SIGNAL is more positive than +SIGNAL. -
Page 70: Figure 18. Typical Differential I/O Line Transmitter/Receiver And Terminators
See Section 9.7.2 for signal characteristics. I/O line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must be provided external to the drive by user, systems integrator, or host equipment manufacturer where needed. -
Page 71: Terminator Requirements
Elite 23 Product Manual, Rev. A Terminator requirements ST423451N and ST423451W drives Internal disc drive I/O termination consists of active circuits contained in an LSI module that is permanently mounted on the PCB. All single initiator/single target (non-daisy-chain) applications require you to terminate the initiator and drive. -
Page 72: Disc Drive Scsi Timing
Elite 23 Product Manual, Rev. A 9.10 Disc drive SCSI timing Table 15: Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical timing Maximum timing Target select time (no arbitration) <1 µs <250 µs Target select time (with arbitration) 4.5-1,2 2.31 µs 2.36 µs... - Page 73 Elite 23 Product Manual, Rev. A Waveform Waveform Description symbol [1] table [1] Typical timing Maximum timing Next CDB byte access (byte 9 of 10) T23.10.9 4.5-4 0.13 µs 0.14 µs Next CDB byte access (byte 10 of 10) T23.10.1 4.5-4 0.12 µs 0.12 µs...
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Page 75: Seagate Technical Support Services
Online technical support for Seagate products is available on CompuServe. To access our technical support forum, type go seagate . This forum provides information similar to that found on SeaBOARD. In addition, you can type questions or browse through previous questions and answers on the forum messages. - Page 76 . (Pacific time) Monday through Friday. Customer service centers Seagate direct OEM, Distribution, and System Integrator customers should contact their Seagate service rep- resentative 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.
- Page 77 Elite 23 Product Manual, Rev. A Index cache control prefetch/multi-segmented 11 cache operation 11 Numerics cache statistics page 40 caching parameters page 41 12 V current profile 20 caching write data 12 3rd party reserve 41 capacities 7 unformatted 9 CDB 12 abort CE Marking 3...
- Page 78 Elite 23 Product Manual, Rev. A DC power requirements 19 emissions 38 DCRT bit 40 environmental interference 15 dedicated landing zone 5 environmental limits 21 default 36 environmental requirements 15 default mode parameter 31 error management 29 default values 43 error rates 15 defect and error management 29 error recovery 29...
- Page 79 Elite 23 Product Manual, Rev. A humidity 23 jumpers function description 36 I/O circuits differential 51 linked command complete single-ended 50 SCSI message 39 IC terminators 7 linked command complete with flag identified defect 29 SCSI message 39 identify lock-unlock cache command 40 SCSI message 39 log select command 40 ignore wide residue...
- Page 80 Elite 23 Product Manual, Rev. A non-shielded cable connectors 50 notch and partition page 41 radiated emissions 38 random data 15 RCD bit 11 operating options 31 read buffer command 41 option jumper 31 read capacity command 41 location 31 read command 41 option select headers 48 read defect data command 41...
- Page 81 47 SCSI timing 62 periods supported 48 SCSI-3 (Fast-20) interface 5 synchronous data transfer req. Seagate support service 31 SCSI message 39 search data equal command 42 synchronous transfer rate 9 search data high command 42 search data low command 42...
- Page 82 Elite 23 Product Manual, Rev. A warranty 16 wide data transfer request SCSI message 39 write and verify command 42 write buffer command 42 write cache enable 12 write command 42 write error counter page 40 write errors 15 write extended command 42 write long command 42 write retry count 29 write same command 42...
- Page 84 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329140, Preliminary Rev. A, Printed in USA...