................................................. Cheetah 36XL Family: ................................................. ST336705LW/LC ................................................. ST318405LW/LC ................................................. ST39205LW/LC ................................................. Product Manual, Volume 1 .................................................
................................................. Cheetah 36XL Family: ................................................. ST336705LW/LC ................................................. ST318405LW/LC ................................................. ST39205LW/LC ................................................. Product Manual, Volume 1 .................................................
© 2001 Seagate Technology LLC All rights reserved Publication number: 75789517, Rev. E October 2001 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either registered trademarks or trademarks of Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications.
Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A Rev. B Rev. C Rev. D Rev. E 12/11/2000 02/27/2001 05/24/2001 07/30/2001 10/09/2001 K. Schweiss/B. Reynolds K. Schweiss/A. Steele K. Schweiss/B. Reynolds K. Schweiss/A. Steele K. Schweiss/B. Reynolds 1/1, v thru ix, 1-83. 4. 4, 51, 53, and 55. 3 and 38. 18, 40-42 ,49, 51-56, and 58. Notice.
Cheetah 36XL Product Manual, Rev. E v Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.
vi Cheetah 36XL Product Manual, Rev. E 6.4 6.5 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . .
Cheetah 36XL Product Manual, Rev. E vii 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. Cheetah 36XL family drive (ST336705LC shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Cheetah 36XL family drive . . . . . . . . . . . . . . . . . . . . . . .
Cheetah 36XL Product Manual, Rev. E 1.0 1 Scope This manual describes Seagate Technology® LLC Cheetah 36XL™ disc drives. Cheetah 36XL drives support the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface specifications to the extent described in this manual. The SCSI Interface Product Manual, part number 75789509, describes general SCSI interface characteristics of this and other families of Seagate drives.
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Cheetah 36XL Product Manual, Rev. E 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 36XL Product Manual, Rev. E 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).
Cheetah 36XL Product Manual, Rev. E 3.0 5 General description Cheetah 36XL drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide SCSI Ultra160 interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. Ultra160 SCSI uses negotiated transfer rates.
6 Cheetah 36XL Product Manual, Rev. E 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 36XL drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns.
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8 Cheetah 36XL Product Manual, Rev. E 3.5 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 read capacities data. Total LBAs = read capacity data (shown below) +1. Formatted (data block size 512 bytes/sector) [1] ST336705 ST318405 ST39205 445DCC9h (36.704 GB) [2] 222EE55h (18.352 GB) [2] 111772Ah (9.176 GB) [2] Notes. [1] [2] 3.
Cheetah 36XL Product Manual, Rev. E 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 ST336705 ST318405 ST39205 36.704 8 241,128 4,577.5 19,036 24,406 381.28 320-490 10,022 2.99 18.352 4 241,128 4,577.5 19,036 24,406 381.28 320-490 10,022 2.99 9.176 2 241,128 4,577.
10 Cheetah 36XL Product Manual, Rev. E SCSI interface data transfer rates (asynchronous): Maximum instantaneous 8 bit wide 5.0 Mbytes/sec [4] Maximum instantaneous 16 bit wide 10.0 Mbytes/sec [4] Synchronous formatted transfer rates: In SCSI Wide (16 bit) Ultra2 SCSI 10.0 to 80 Mbytes/sec Sustainable data transfer rates: Minimum Average Maximum 23 Mbytes/sec 33 Mbytes/sec 37 Mbytes/sec Ultra160 SCSI 10.
Cheetah 36XL Product Manual, Rev. E 11 enabled and disabled independently via the Mode Select command. However, in actual operation the prefetch feature overlaps 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 Tables 7 and 8. 4.5 Cache operation In general, 4096 kbytes of the physical buffer space in the drive can be used as storage space for cache operations.
12 Cheetah 36XL Product Manual, Rev. E RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If there are, the respective cache segments are cleared. The new data is cached for subsequent Read commands.
Cheetah 36XL Product Manual, Rev. E 13 The base cache buffer configuration for desktop or server environments needs to be set correctly by the host system. This involves setting the PM bit in Mode Page 0, Byte 2, as well as the number of cache buffer segments in Mode Page 8, Byte 13. The firmware default values are set to desktop mode (PM bit = 1), and the number of cache buffer segments set to 16 (10h). The OEM saved values for drives with LW interface is the same as the firmware default values.
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Cheetah 36XL Product Manual, Rev. E 5.0 15 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).
16 Cheetah 36XL Product Manual, Rev. E error (15h) is reported with a Medium error (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to the SCSI Interface Product Manual, part number 75789509, for Request Sense information. 5.2 Reliability and service You can enhance the reliability of Cheetah 36XL disc drives by ensuring that the drive receives adequate cooling. Section 6.
Cheetah 36XL Product Manual, Rev. E 5.2.6 17 Hot plugging Cheetah 36XL disc drives The ANSI SPI-3 (T10/1302D) document defines the physical requirements for removal and insertion of SCSI devices on the SCSI bus. Four cases are addressed. The cases are differentiated by the state of the SCSI bus when the removal or insertion occurs.
18 Cheetah 36XL Product Manual, Rev. E The process of measuring off-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.
Cheetah 36XL Product Manual, Rev. E 19 There are two test coverage options implemented in DST: 1. extended test 2. short test The most thorough option is the extended test that performs various tests on the drive and scans every logical block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the entire media surface, but does some fundamental tests and scans portions of the media.
20 Cheetah 36XL Product Manual, Rev. E Short test (Function Code: 001b) The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within 120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and scans portions of the media. A complete read/verify scan is not performed and only factual failures will report a fault condition. This option provides a quick confidence test of the drive.
Cheetah 36XL Product Manual, Rev. E 21 Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in transit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment. Product repair and return information Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does not sanction any third-party repair facilities.
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Cheetah 36XL Product Manual, Rev. E 6.0 23 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 36XL 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.
24 Cheetah 36XL Product Manual, Rev. E 6.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak to peak measurements and apply at the drive power connector. +5 V = +12 V = 150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz. 150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz. 6.2.2 Power sequencing The drive does not require power sequencing.
Cheetah 36XL Product Manual, Rev. E 25 +12 Volt Current during spindle start – Typical Amperes 3.0 AC Envelope 2.5 Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T2 T0 T1 0.0 2 T4 T3 4 6 8 T5 10 12 14 16 12 14 16 Seconds Figure 3. Typical ST336705 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes AC Envelope 3.0 2.5 Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T0 T1 0.0 T2 T4 T3 2 4 T5 6 8 Seconds Figure 4.
26 Cheetah 36XL Product Manual, Rev. E +12 Volt Current during spindle start – Typical Amperes 3.0 AC Envelope 2.5 Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T0 T1 T2 0.0 T4 T3 2 T5 4 6 8 10 12 14 16 Seconds Figure 5. Typical ST39205 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes 3.0 2.5 AC Envelope Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T2 T1 T0 0.0 2 4 6 8 Seconds Figure 6.
Cheetah 36XL Product Manual, Rev. E 27 +12 Volt Current during spindle start – Typical Amperes 3.0 2.5 AC Envelope Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T2 T1 T0 0.0 2 T4 T3 4 6 8 T5 10 12 14 16 Seconds Figure 7. TypicalST318405 drive +5 V current profile +5 Volt Current during spindle start – Typical Amperes 3.0 2.5 AC Envelope Nominal (average) DC curve 2.0 1.5 A 1.0 0.5 0.0 T0 T1 0.0 T2 2 T3 4 T4 T5 6 8 Seconds Figure 8.
28 Cheetah 36XL Product Manual, Rev. E 6.3 Power dissipation ST336705 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 9.6 watts (32.8 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 9.6 watts (32.8 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 9).
Cheetah 36XL Product Manual, Rev. E 29 ST318405 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour). Amperes To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 10).
30 Cheetah 36XL Product Manual, Rev. E ST39205 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 7.5 watts (25.6 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.5 watts (25.6 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 10).
Cheetah 36XL Product Manual, Rev. E 31 The maximum allowable HDA case temperature is 140°F (60°C). 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. HDA Temp. Check Point .5 " Figure 12. Location of HDA Temperature Check Point b. Non-operating –40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour.
32 Cheetah 36XL Product Manual, Rev. E b. Operating—abnormal Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent shock not exceeding 15.0 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at abnormal levels may promote degraded operational performance during the abnormal shock period. Specified operational performance will continue when normal operating shock levels resume. Shock may be applied in the X, Y, or Z axis.
Cheetah 36XL Product Manual, Rev. E 33 Z X Y X Figure 13.
34 Cheetah 36XL Product Manual, Rev. E 6.4.4.2 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 5-22Hz @ 0.045 inches (1.143 mm) displacement (peak to peak) 22-300 Hz @ 1.1 G (zero to peak) 300-350 Hz @ 0.83 G (zero to peak) Vibration may be applied in the X, Y, or Z axis. b.
Cheetah 36XL Product Manual, Rev. E 6.5 35 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 14 and 15 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.” Height: Width: Depth: Weight: 1.000 in 4.000 in 5.75 in 1.5 pounds (ST336705) 25.4 mm 101.6 mm 146.05 mm 0.
36 Cheetah 36XL Product Manual, Rev. E K S // T -Z- [1] -Z- L J H B Notes: R N -Z- -X- A -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 G H J K L M N R S T U G F [1] E D -X- Figure 15. LC mounting configuration dimensions Dimension Table Inches Millimeters 25.
Cheetah 36XL Product Manual, Rev. E 7.0 37 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).
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Cheetah 36XL Product Manual, Rev. E 8.0 Note. 39 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.
40 Cheetah 36XL Product Manual, Rev. E Drive Front Jumper Plug (enlarged to show detail) Pin 1 J6 [1] [5] 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 SCSI ID = 7 [2] SCSI ID = 8 SCSI ID = 9 SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15 [5] [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 36XL Product Manual, Rev. E 41 Drive HDA (rear view, PCB facing downward) Pin 1 J5 Pin 1 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.
42 Cheetah 36XL Product Manual, Rev. E 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 [2] 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 18. J2 option select header 8.1.1 Notes for figures 16, 17, and 18. [1] (applies to “LW” model only; reserved on “LC” model) Term.
Cheetah 36XL Product Manual, Rev. E 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.
44 8.2 Cheetah 36XL Product Manual, Rev. E 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 36XL Product Manual, Rev. E 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 36XL. 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 36XL Product Manual, Rev. E SCSI interface commands supported Table 5 following lists the SCSI interface commands that are supported by the drive. Cheetah 36XL Family drives can be changed back and forth between SCSI-1, SCSI-2, and SCSI-3 (Ultra160) modes using the Change Definition Command. OEM standard drives are shipped set to operate in Ultra160 mode.
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Cheetah 36XL Product Manual, Rev. E 49 Table 6 lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI Interface Product Manual, part number 75789509, Inquiry command section.
50 Cheetah 36XL Product Manual, Rev. E Current values are volatile values currently being used by the drive to control its operation. A Mode Select command can be used to change these values (only those that are changeable). Originally, they are installed from saved or default values after a power on reset, hard reset, or Bus Device Reset message.
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52 [3] Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condition for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface. Drives manufactured with all other interfaces (LC) set the Saved value of the PM bit set to the Server mode (zero).
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54 [3] Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condition for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface. Drives manufactured with all other interfaces (LC) set the Saved value of the PM bit set to the Server mode (zero).
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56 [3] Cheetah 36XL Product Manual, Rev. E mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condition for the PM bit is set to one for Desktop mode. During the manufacturing process, the Saved value of the PM bit remains set to the firmware default condition (one) for drives with the LW interface. Drives manufactured with all other interfaces (LC) set the Saved value of the PM bit set to the Server mode (zero).
Cheetah 36XL Product Manual, Rev. E 9.4 57 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 SCSI Interface Product Manual, part number 75789509, for details.
58 Cheetah 36XL Product Manual, Rev. E 9.5 Synchronous data transfer 9.5.1 Synchronous data transfer periods supported Table 11 and Section 9.5.2 list 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 75789509.
Cheetah 36XL Product Manual, Rev. E 59 Pin 1P 2P 3P 4P J1 Pin 1 Power +12V +12V ret + 5V ret + 5V J5 Pin 1 J1-DC Power 4P 3P 2P 1P PCBA J1-DC Power J5 Pin 1 Pin 1P J1 Pin 1 68 Pin SCSI I/O Connector J2 J6 Figure 19. LW model drive physical interface (68-pin J1 SCSI I/O connector) J1 80 Pin SCSI I/O and Power Connector Pin 1 J6 Figure 20.
60 Cheetah 36XL Product Manual, Rev. E 9.6.2 SCSI interface physical description The drive models described by this product manual support the physical interface requirements of the Ultra160 SCSI Parallel Interface-3 (SPI-3) standards as defined in American National Standard document X3T10/1302D revision 14, and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 standards.
Cheetah 36XL Product Manual, Rev. E 61 To minimize discontinuances and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness, cable length, number of loads and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered.
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Cheetah 36XL Product Manual, Rev. E 63 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 3.650 (92.71) Figure 22. Nonshielded 68 pin SCSI device connector used on LW drives .085 x 45° chamfer (2.16) typ Pos. 1 .767 (19.48) 1 .
64 Cheetah 36XL Product Manual, Rev. E 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 23.
Cheetah 36XL Product Manual, Rev. E Table 13: Note. 65 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.
66 Cheetah 36XL Product Manual, Rev. E Table 14: 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 36XL Product Manual, Rev. E Table 15: Note. 67 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.
68 Cheetah 36XL Product Manual, Rev. E Table 16: 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 36XL Product Manual, Rev. E 69 Notes [ ] for tables 13 through 16. [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.
70 Cheetah 36XL Product Manual, Rev. E Output characteristics Each signal (Vs) driven by LVD interface drivers shall have the following output characteristics when measured at the disc drive connector: 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.
Cheetah 36XL Product Manual, Rev. E 9.7.1.1 71 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 17 lists the maximum lengths allowed for different configurations of drive usage. These values are from the SPI-3 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.
72 Cheetah 36XL Product Manual, Rev. E 9.10 Disc drive SCSI timing Table 18: Disc drive SCSI timing 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 4.5-3 3.36 µs Command to Status T05 4.5-5 Command Dependent Command to Data (para.
Cheetah 36XL Product Manual, Rev. E Table 18: 73 Disc drive SCSI timing (Continued) Description Waveform symbol [1] Waveform table [1] Typical timing 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 0.12 µs Next Data Out Byte Access (parameter) T27 4.5-13 0.12 µs Data In Byte Transfer (media) [2] T28 4.5-12 0.04 µs Data Out Byte Transfer (media) [2] T29 4.5-13 0.
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Cheetah 36XL Product Manual, Rev. E 10.0 75 Seagate Technology support services Online Services Internet www.seagate.com for information about Seagate products and services. Worldwide support is available 24 hours daily by e-mail for your disc or tape questions. Presales Support: Disc: www.seagate.com/support/email/email_presales.html or DiscPresales@Seagate.com. Tape: www.seagate.com/support/email/email_tape_presales.html or Tape_Sales_Support@Seagate.com. Technical Support: Disc: www.seagate.
76 Cheetah 36XL Product Manual, Rev. E Customer Service (CSO) Warranty Service Seagate offers worldwide customer support for Seagate drives. Seagate direct OEM, Distribution and System Integrator customers should contact their Seagate service center representative for warranty information. Other customers should contact their place of purchase. Authorized Service Centers If you live outside the US, you can contact an Authorized Service Center for service.
Cheetah 36XL Product Manual, Rev. E Spain Sweden Switzerland Turkey United Kingdom 77 900-98 31 24 0 207 90 073 0 800-83 84 11 00 800-31 92 91 40 0 800-783 5177 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.
78 Cheetah 36XL Product Manual, Rev.
Cheetah 36XL Product Manual, Rev.
80 DC power requirements 23 DC power source 61 dedicated landing zone 5 default 42, 43 default mode parameter 39 default value 49, 50 defect/error management 37 delayed motor start option 23, 69 delayed start 43 depot repair 16 depot repair philosophy 16 diagnostics 24 differential I/O circuit 43 differentiating features 5 dimensions 35 disable read ahead 12 disc access 11 disc media 9 disc rotational speed 9 disconnect/reconnect 11 control 11 specification 11 discontinuity (DISC) bit 12 DRA bit 12 drive 34
Cheetah 36XL Product Manual, Rev.
82 orientation 10, 31, 44 out-of-plane deflection 44 out-of-plane distortion 44 Output characteristics 70 P package size 32 package test specification 4 packaged 32 parity 43 parity checking 43 parity error 43 partition or logical drive 39 PCB 16, 42, 44 PCBA 39, 44, 49, 58, 60, 62 PCBA circuit run 60 PD jumper 43 peak bits/inch 9 peak starting current 23 performance characteristics 9 performance degradation 32 peripheral I/O cable 24 physical buffer space 11 physical characteristics 58 physical damage 34
Cheetah 36XL Product Manual, Rev. E SCSI systems error management 38 SCSI Ultra160 implementation 50 SCSI Ultra160 interface 5 SE 69 Seagate support service 39 sector 11 sector interleave 9 sector size 8 sector sizes 10 seek error 15 seek positioning error 15 segment 11 segment number 11 self-contained 11 Self-Monitoring Analysis and Reporting Technology. See S.M.A.R.T.
Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 75789517, Rev.
