................................................. Cheetah 18LP Family: ................................................. ST318203LW/LWV/LC/LCV ................................................. ST318233LWV/LCV ................................................. ST39103LW/LWV/LC/LCV ................................................. ST39133LWV/LCV ................................................. Product Manual, Volume 1 .................................................
................................................. Cheetah 18LP Family: ................................................. ST318203LW/LWV/LC/LCV ................................................. ST318233LWV/LCV ................................................. ST39103LW/LWV/LC/LCV ................................................. ST39133LWV/LCV ................................................. Product Manual, Volume 1 .................................................
© 1998, 1999, 2000 Seagate Technology, Inc. All rights reserved Publication number: 83329400, Rev. F February 2000 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trademarks or registered trademarks of Seagate Technology, Inc. or one of its subsidiaries. All other trademarks or registered trademarks are the property of their respective owners.
Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A Rev. B Rev. C 12/01/98 01/12/99 02/19/99 L. Newman/D. Rusch L. Newman/D. Rusch L. Newman/D. Rusch Rev. D Rev. E Rev. F 05/18/99 06/15/99 2/21/2000 L. Newman/D. Rusch L. Newman/D. Rusch L. Newman/G. Velaski 9, 10, 24, 25, 43, 7, 33, 45 and 47. Adds ST39103LW/LC data and rewords references to the SCSI I/O Manual. Pages 5, 8, 9, 14, 19, 21, 22, 23, 24, 25, 31, 32, 46, 47, 50, 51, 52, 53, 54, 55, 63, and 67.
Cheetah 18LP Product Manual, Rev. F vii Table of Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.
viii Cheetah 18LP Product Manual, Rev. F 6.4.2 6.4.3 6.4.4 6.5 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 6.4.4.1 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cheetah 18LP Product Manual, Rev. F ix List of Figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Cheetah 18LP family drive (LW model shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Cheetah 18LP family drive .
Cheetah 18LP Product Manual, Rev. F 1.0 1 Scope This manual describes Seagate Technology®, Inc. Cheetah 18LP™ disc drives. ST318203 and ST39103 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI-2, and SCSI-3 (Fast-20 and Fast-40) interface specifications to the extent described in this manual. The SCSI Interface Product Manual (part number 77738479) describes general SCSI interface characteristics of these Seagate drives.
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Cheetah 18LP Product Manual, Rev. F 2.0 3 Applicable standards and reference documentation The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its host equipment to provide adequate power and environment in order to achieve optimum performance and compliance with applicable industry and governmental regulations.
4 Cheetah 18LP Product Manual, Rev. F Australian C-Tick If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995 and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Management Agency (SMA). 2.
Cheetah 18LP Product Manual, Rev. F 3.0 5 General description Cheetah 18LP drives combine dual stripe magnetoresistive (DSMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide Ultra2 (Ultra160 on ST318233 and ST39133 models) SCSI interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.
6 Cheetah 18LP Product Manual, Rev. F An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and handling. The shipping lock automatically disengages when power is applied to the drive and the head load process begins. Cheetah 18LP drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns.
Cheetah 18LP Product Manual, Rev. F 3.
8 Cheetah 18LP Product Manual, Rev. F 3.5 Unformatted and formatted capacities Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The following table shows the standard OEM model capacities: ST318203 and ST318233 ST39103 and ST39133 Formatted data block size 512 bytes/sector [1] Unformatted 21EB390h (18.20 GB) [2] 10F59C8h (9.10 GB) [2] 21.6 GB 10.8 GB Notes. [1] [2] 3.6 Sector size selectable at format time.
Cheetah 18LP Product Manual, Rev. F 9 4.0 Performance characteristics 4.1 Internal drive characteristics (transparent to user) Drive capacity Read/write heads Bytes/track Bytes/surface Tracks/surface (total) Tracks/inch Peak bits/inch Internal data rate Disc rotational speed Average rotational latency 4.2 ST318203 ST39103 ST318233 ST39133 18.2 12 153,284– 229,045 1,913 9,801 12,580 252 193-308 10,016 2.99 9.10 6 153,284– 229,045 1,913 9,801 12,580 252 193–308 10,016 2.99 18.
10 Cheetah 18LP Product Manual, Rev. F Synchronous transfer rate for Ultra160 SCSI (ST318233 and ST39133 models): In single-ended (SE) interface mode 5.0 to 40 Mbytes/sec In low voltage differential (LVD) interface mode 5.0 to 160 Mbytes/sec Sector Sizes: Default Variable 512 byte user data blocks 512 to 4,096 bytes per sector in even number of bytes per sector. If n (number of bytes per sector) is odd, then n-1 will be used.
Cheetah 18LP Product Manual, Rev. F 11 table of logical block disk medium addresses of the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See the appropriate SCSI Interface Product Manual), data requested by the host with a Read command is retrieved from the buffer (if it is there), before any disc access is initiated.
12 Cheetah 18LP Product Manual, Rev. F while writing the data to the medium, and GOOD status has already been returned, a deferred error will be generated. The Synchronize Cache command may be used to force the drive to write all cached write data to the medium. Upon completion of a Synchronize Cache command, all data received from previous write commands will have been written to the medium. Tables 9 show Mode default settings for the drives. 4.5.
Cheetah 18LP Product Manual, Rev. F 5.0 13 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).
14 Cheetah 18LP Product Manual, Rev. F unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to the appropriate SCSI Interface Product Manual, for Request Sense information. 5.2 Reliability and service You can enhance the reliability of Cheetah 18LP disc drives by ensuring that the drive receives adequate cooling. Section 6.0 provides temperature measurements and other information that may be used to enhance the service life of the drive. Section 8.
Cheetah 18LP Product Manual, Rev. F 5.2.3 15 Preventive maintenance No routine scheduled preventive maintenance shall be required. 5.2.4 Service life The drive shall have a useful service life of five years. Depot repair or replacement of major parts is permitted during the lifetime (see Section 5.2.5). 5.2.5 Service philosophy Special equipment is required to repair the drive HDA.
16 5.2.8 Cheetah 18LP Product Manual, Rev. F 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. Note. The firmware will monitor specific attributes for degradation over time but cannot predict instantaneous drive failures.
Cheetah 18LP Product Manual, Rev. F 17 Predictive failures S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firmware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented whenever the error rate is unacceptable and decremented (not to exceed zero) whenever the error rate is acceptable.
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Cheetah 18LP Product Manual, Rev. F 6.0 19 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 18LP drive. 6.1 AC power requirements None. 6.2 DC power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. The table shows current values in Amperes.
20 Cheetah 18LP Product Manual, Rev. F [6] Operating condition is defined as random 8 block reads at 200 I/Os per second for ST318203 drive, 203 I/ Os per second for ST39103 drives, and 197 I/Os per second for ST318233 and ST39133 drives. Current and power specified at nominal voltages. ST318203 and ST39103: Increasing +5 volts by +5% increases 5 volt current by < 0.5%. ST318233 and ST39133: Decreasing +5 volts by +5% increases 5 volt current by 2.7%.
Cheetah 18LP Product Manual, Rev. F 21 +12 Volt Current during spindle start – Typical Amperes 2.5 AC Envelope DC (average) of waveform 2.0 A 1.5 1.0 0.5 0.0 T0 T1 T2 0.0 T3 T4 2 4 6 8 10 12 14 16 Seconds Figure 3. Typical ST318203 and ST318233 drive +12 V current profile +12 Volt Current during spindle start – Typical Amperes 2.5 Peak AC Envelope 2.0 Peak DC 1.5 A 1.0 0.5 0 T0 T1 T2 0.0 T3 T4 2 4 6 8 10 Seconds Figure 4.
22 Cheetah 18LP Product Manual, Rev. F +5 Volt Current during spindle start – Typical Amperes +5V Current (amps) AC Component 1.0 A 0.5 Nominal (average) DC curve 0 T0 T1 T2 0.0 T3 4 8 T4 T5 12 16 20 24 28 32 Seconds Figure 5. Typical ST318203 and ST318233 drive +5 V current profile +5 Volt Current during spindle start – Typical Amperes +5V Current (amps) AC Component 1.0 A 0.5 Nominal (average) DC curve 0 T0 T1 T2 0.0 T3 2 4 6 T4 T5 8 10 Seconds Figure 6.
Cheetah 18LP Product Manual, Rev. F 6.3 23 Power dissipation ST318203 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.65 watts (36.3 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.75 watts (36.7 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curves.
24 Cheetah 18LP Product Manual, Rev. F ST39103 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 7.63 watts (26 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.68 watts (26.2 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 9 and 10).
Cheetah 18LP Product Manual, Rev. F 25 ST318233 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 11.8 watts (40.27 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 12.2 watts (41.63 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 7 and 8).
26 Cheetah 18LP Product Manual, Rev. F ST39133 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 9.4 watts (32 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 9.8 watts (33.4 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 7 and 8).
Cheetah 18LP Product Manual, Rev. F 6.4 27 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 82°F (28°C). 6.4.1 Temperature a.
28 Cheetah 18LP Product Manual, Rev. F b. Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp. Check Point 1.0 " .5" Model “LC” PCBA Model “LW” PCBA J6 1 J6 1 U12 U12 U11 U11 J4 J4 U20 U20 U3 U3 U1 U1 2 2 U7 U18 U7 U18 U6 U14 U6 U14 4 4 U5 U5 3 J1A 3 J1 Figure 15.
Cheetah 18LP Product Manual, Rev. F 6.4.4 29 Shock and vibration Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent, it may be necessary to modify the enclosure to minimize drive movement.
30 Cheetah 18LP Product Manual, Rev. F Z X Y X Figure 16.
Cheetah 18LP Product Manual, Rev. F 6.4.4.2 31 Vibration a. Operating - normal The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not exceeding 5-400 Hz @ 0.5 G Vibration may be applied in the X, Y, or Z axis. b.
32 6.5 Cheetah 18LP Product Manual, Rev. F Mechanical specifications The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 17 and 18 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.” Height: Width: Depth: Weight: 1.000 in 4.000 in 5.75 in 1.3 pounds (ST318203 and ST318233) 1.2 pounds (ST39103 and ST39133) 25.4 mm 101.6 mm 146.05 mm 0.589 kilograms 0.
Cheetah 18LP Product Manual, Rev. F 33 K S // T -Z- [1] -Z- L J H B Notes: R N -Z- -XA -Z- M [1] Mounting holes are 6-32 UNC 2B, three on each side and four on the bottom. Max screw penetration into side of drive is 0.15 in. (3.81 mm). Max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in. (3.05 mm). C U -XA B C D E F H J K L M N P R S T U P F [1] E D -X- Figure 18.
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Cheetah 18LP Product Manual, Rev. F 7.0 35 Defect and error management The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of 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).
36 Cheetah 18LP Product Manual, Rev. F Table 5: Read and write retry count maximum recovery times [1] Read retry count [1] Maximum recovery time per LBA (cumulative, msec) Write retry count Maximum recovery time per LBA (cumulative, msec) 0 65.7 0 35.8 1 77.6 1 53.7 2 89.6 2 59.7 3 113.4 3 77.6 4 149.3 4 185.1 5 197.0 5 (default) 226.9 6 244.8 7 334.3 8 394.0 9 441.8 10 549.2 11 2,009.2 12 (default) 4,283.8 [1] These values are subject to change.
Cheetah 18LP Product Manual, Rev. F 8.0 Note. 37 Installation These drives are designed to be used only on single-ended (SE) or low voltage differential (LVD) busses. Do not install these drives on a high voltage differential (HVD) bus. The first thing to do when installing a drive is to set the drive SCSI ID and set up certain operating options.
38 Cheetah 18LP Product Manual, Rev. F Drive Front Jumper Plug (enlarged to show detail) Pin 1 J6 [1] Reserved L R E E D S A3 A2 A1A0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 [4] SCSI ID = 7 SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 [4] Host Alternate Usage Plug: Reserved Pins 11 9 7 5 3 1 8 Shipped with cover installed. Do not install jumpers; retain cover.
Cheetah 18LP Product Manual, Rev. F 39 Drive HDA (rear view, PCB facing downward) Pin 1 J5 Pin 1 +5V Ground [1] [2] 4P [2] 68 Pin SCSI I/O Connector J1 SCSI ID = 0 3P 2P 1P J1-DC Power (default) PCB SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 For ID selection use jumpers as shown or connect a cable for remote switching as shown below.
40 Cheetah 18LP Product Manual, Rev. F J2 Jumper Positions Pin 1 RR S D MW P E E T E S EP DSS P Force single-ended bus mode Delay Motor Start [3] Enable Remote Motor Start Write Protect Parity Disable *Additional notes on these functions in section 8.1.2. Reserved J2 Jumper Plug (enlarged to show detail) Figure 21. J2 option select header 8.1.1 Notes for Figures 19, 20, and 21. [1] (applies to “LW” model only; reserved on “LC” model) Term.
Cheetah 18LP Product Manual, Rev. F 8.1.2 Function description J2 jumper installation SE On Off ME Off On Off On On PD On Off RES Off TP1 Off On Jumper function description Forces drive to use single-ended I/O drivers/receivers only. Drive can operate on the interface in low voltage differential mode or single-ended, depending on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed.
42 8.2 Cheetah 18LP Product Manual, Rev. F Drive orientation 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.
Cheetah 18LP Product Manual, Rev. F 8.4 43 Drive mounting When mounting the drive using the bottom holes (x-y plane in Figure 16) care must be taken to ensure that the drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm).
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Cheetah 18LP Product Manual, Rev. F 9.0 45 Interface requirements This section partially describes the interface requirements as implemented on the drives. 9.1 General description This section describes in essentially general terms the interface requirements supported by the Cheetah 18LP. No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate.
46 9.3 Cheetah 18LP Product Manual, Rev. F SCSI interface commands supported Table 7 following lists the SCSI interface commands that are supported in the SCSI-2, and SCSI-3 modes of the drive. Cheetah 18LP Family drives can be changed back and forth between SCSI-1 and SCSI-2/SCSI-3 modes using the Change Definition Command. OEM standard drives are shipped set to operate in SCSI-2/ SCSI-3 mode.
Cheetah 18LP Product Manual, Rev.
48 Cheetah 18LP Product Manual, Rev. F Table 7: Commands supported by Cheetah 18LP family drive (Continued) Command name Send diagnostics Supported diagnostics pages (00h) Translate page (40h) Set limits Start unit/stop unit (spindle ceases rotating) (1Ch) Synchronize cache Test unit ready Verify BYTCHK bit Write Write and verify DPO bit Write buffer (modes 0, 2, supported) Firmware download option (modes 5, 7 supported). Ah and Bh also supported by Ultra160.
Cheetah 18LP Product Manual, Rev. F 49 Table 8 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI Interface Product Manual, Inquiry command section.
50 9.3.2 Cheetah 18LP Product Manual, Rev. F Mode Sense data The Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode 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 nonvolatile memory on the drive PCBA. Default values can be changed only by downloading a complete set of new firmware into the flash EPROM.
Cheetah 18LP Product Manual, Rev. F 51 The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI-2/SCSI-3 implementation (see the appropriate SCSI Interface Product Manual). Definitions: Note. Table 9: DEF CHG = Default value. Standard drives are shipped configured this way. = Changeable bits; indicates if current and saved values are changeable. Saved values for OEM drives are normally the same as the default values.
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Cheetah 18LP Product Manual, Rev. F 9.4 53 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. Refer to the appropriate SCSI Interface Product Manual, for details.
54 Cheetah 18LP Product Manual, Rev. F 9.5 Synchronous data transfer 9.5.1 Synchronous data transfer periods supported ST318203 and ST39103 models: Table 12 lists the synchronous data transfer periods supported by the drive. The data transfer period to be used by the drive and the initiator is established by an exchange of messages during the Message Phase of operation. See the section on message protocol in the SCSI Interface Product Manual, part number 77738479.
Cheetah 18LP Product Manual, Rev. F 9.6 55 Physical interface This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface. See Section 9.8 and Section 9.9 for additional terminator information. Figures 23 and 24 show the locations of the DC power connector, SCSI interface connector, drive select headers, and option select headers.
56 Cheetah 18LP Product Manual, Rev. F Pin 1P 2P 3P 4P J1 Pin 1 Power +12V +12V ret + 5V ret + 5V J5 Pin 1A J1-DC Power 4P 3P 2P 1P PCB J1-DC Power J5 Pin 1A Pin 1P J1 Pin 1 68 Pin SCSI I/O Connector J2 J6 Figure 23. LW and LWV model drive physical interface (68-pin J1 SCSI I/O connector) 80-pin SCSI I/O Connector Pin 1 J2 J6 Figure 24.
Cheetah 18LP Product Manual, Rev. F 9.6.2 57 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the SCSI-3 Parallel Interface-2 (SPI-2) standards as defined in American National Standard document X3T10/1142D revision 14, and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 standards.
58 Cheetah 18LP Product Manual, Rev. F 9.6.3 SCSI interface cable requirements The characteristics of cables used to connect SCSI-3 parallel interface devices are discussed in detail in section 6 of ANSI Standard X3T10/1142D. The cable characteristics that must be considered when interconnecting the drives described in this manual in a SCSI-3 parallel, daisy-chain interconnected system are: • • • • • characteristic impedance (see Section 6.1) propagation delay (see Section 6.
Cheetah 18LP Product Manual, Rev. F 9.6.4.2 59 Mating connectors for LC and LCV model drives The nonshielded connector shall be an 80-conductor connector consisting of two rows of 40 contacts with adjacent contacts 50 (1.27 mm) mils apart (see Figure 27). I/O connection using a cable is not recommended.
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Cheetah 18LP Product Manual, Rev. F 61 3.650±.005 .346 .155 1.650 .270 .3937 .050 .600 .0787 .022 .200 .020 .047 .60 (15.24) .519 (13.18) .100 (2.54) 1.816 (46.13) .315 (8.00) Position 1 Pos. 1 .20 typ (5.08) 32 4 .218 (5.54) .050 (1.27) Pos. 35 1.650 (41.91) .0787 (2.00) Pos. 68 .980 (24.89) 1.368 (37.74) .840 ± .005 (21.34) Pos. 2 .767 (19.48) 3.650 (92.71) Figure 26. .085 x 45° chamfer (2.16) typ Pos.
62 Cheetah 18LP Product Manual, Rev. F 7.00 (.276) 12.70 (.500) End View Grounding Pins 2.15±0.10 2 places 57.87 0 (2.278) –0.15 + .000 [ – .006 [ 0.15 M Y M –Y– CL of Datum Y Front View Pin 1 62.15 ± 0.15 (2.447) (± .005) 0.15 M Y M Insert mating I/O connector Housing X Top View Contact 0.50 (.020) 0.3 M Y M (.012) Pin 1 1.27 (.05) Typ X CL of Datum Y Grounding Pins Pin 40 Back View Pin 41 Figure 27.
Cheetah 18LP Product Manual, Rev. F Table 16: Note. 63 LW 68-conductor single-ended (SE) P cable signal/pin assignments [11] A minus sign preceding a signal name indicates that signal is active low.
64 Cheetah 18LP Product Manual, Rev. F Table 17: Note. LW 68-conductor LVD P cable signal/pin assignments [11] A minus sign preceding a signal name indicates that signal is active low.
Cheetah 18LP Product Manual, Rev. F Table 18: Note. 65 LC 80-pin single-ended (SE) I/O connector pin assignments [11] A minus sign preceding a signal name indicates that signal is active low.
66 Cheetah 18LP Product Manual, Rev. F Table 19: Note. LC 80-pin single-ended (LVD) I/O connector pin assignments [11] A minus sign preceding a signal name indicates that signal is active low.
Cheetah 18LP Product Manual, Rev. F 67 Notes [ ] for Tables 16 through 19. [1] [2] See Section 9.6.4.1 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. Other cables types may be used to implement equivalent contact assignments. [3] Connector contacts are on 0.050 inch (1.27 mm) centers.
68 Cheetah 18LP Product Manual, Rev. F Steady state Low level output voltage* = –.95 V = < Vs = < –1.55 V (signal negation/logic 0) Steady state High level output voltage* = –.95 V = < Vs = < 1.55 V (signal assertion/logic 1) Differential voltage = +0.6 V minimum with common-mode voltage ranges 0.700 V = < Vcm = < 1.800 V. *These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference. The output characteristics shall additionally conform to EIA RS-485.
Cheetah 18LP Product Manual, Rev. F 9.7.1.1 69 Single-ended drivers/receivers The maximum total cable length allowed with drives using single-ended I/O driver and receiver circuits depends on several factors. Table 20 lists the maximum lengths allowed for different configurations of drive usage. These values are from the SPI-2 document. All device I/O lines must have equal to or less than 25 pf capacitance to ground, measured at the beginning of the stub.
70 Cheetah 18LP Product Manual, Rev. F 9.10 Disc drive SCSI timing Table 21: Disc drive SCSI timing These values are not current Cheetah 18LP values, but are listed for information only. Description Waveform symbol [1] Waveform table [1] Typical timing Target Select Time (no Arbitration) T00 N/A <1 µs Target Select Time (with Arbitration) T01 4.5-1,2 1.93 µs Target Select to Command T02 4.5-1 3.77 µs Target Select to MSG Out T03 4.5-2 1.57 µs Identify MSG to Command T04 4.
Cheetah 18LP Product Manual, Rev. F Table 21: 71 Disc drive SCSI timing (Continued) These values are not current Cheetah 18LP values, but are listed for information only. Description Next CDB Byte Access (Byte 10 of 10) Waveform symbol [1] Waveform table [1] Typical timing T23.10.10 4.5-4 0.12 µs ±1 µs Data In Byte Transfer (parameter) T24 4.5-12 0.04 µs Data Out Byte Transfer (parameter) T25 4.5-13 0.04 µs Next Data In Byte Access (parameter) T26 4.5-12 0.
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Cheetah 18LP Product Manual, Rev. F 10.0 73 Seagate Technology support services Online Services Internet For online information about Seagate products, visit www.seagate.com or e-mail your disc or tape questions to: Presales Support: Disc: http://www.seagate.com/support/email/email_presales.html or DiscPresales@Seagate.com Tape: http://www.seagate.com/support/email/email_tape_presales.html or Tape_Sales_Support@Seagate.com Technical Support: Disc: http://www.seagate.com/support/email/email_disc_support.
74 Cheetah 18LP Product Manual, Rev. F Authorized Service Centers If you live outside the US, you can contact an Authorized Service Center for service.
Cheetah 18LP Product Manual, Rev. F Turkey United Kingdom 75 00 800-31 92 91 40 0 800-783 5177 SeaBOARD Germany +49-89-1409331 Fax Services—All European Countries Presales/Technical Support/Warranty Service 31-20-653-3513 Africa/Middle East Support Services For presales, technical support, warranty service and FAX services in Africa and the Middle East, dial our European call center at +31-20-316-7222 from 8:30 a.m. to 5:00 p.m.
76 Cheetah 18LP Product Manual, Rev.
Cheetah 18LP Product Manual, Rev.
78 DC power 10, 13, 41, 55 DC power carrying conductor 59 DC power connector 55 DC power requirements 19 DC power source 59 dedicated landing zone 5 default 40, 41 default mode parameter 37 default value 50, 51 defect/error management 35 delayed motor start option 19, 67 delayed start 41 depot repair 15 depot repair philosophy 15 diagnostics 20 differential I/O circuit 41 differentiating features 5 dimensions 32 disable read ahead 12 disc access 11 disc media 9 disc rotational speed 9 disconnect/reconnect 1
Cheetah 18LP Product Manual, Rev.
80 operator intervention 13 option jumper 37 option jumper location 37 option select header 55 option select jumper 37 options 8 orientation 10, 29, 42 out-of-plane deflection 43 out-of-plane distortion 43 Output characteristics 67 P package size 29 package test specification 4 packaged 29 parity 41 parity checking 41 parity error 41 partition or logical drive 37 PCB 15, 40, 42 temperature 27 PCBA 37, 43, 50, 55, 57, 60 PCBA circuit run 57 PD jumper 41 peak bits/inch 9 peak starting current 20 performance
Cheetah 18LP Product Manual, Rev.
82 write protect 41 write retry count 35 Z zoned bit recording (ZBR) 7 Cheetah 18LP Product Manual, Rev.
Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329400, Rev.
