................................................. Cheetah 36 Family: ................................................. ST136403LW/LC ................................................. ................................................. ................................................. Product Manual, Volume 1 .................................................
................................................. Cheetah 36 Family: ................................................. ST136403LW/LC ................................................. ................................................. ................................................. Product Manual, Volume 1 .................................................
© 1999 Seagate Technology, Inc. All rights reserved Publication number: 83329440, Rev. B August 1999 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 06/02/99 07/20/99 L. Newman/D. Rusch L. Newman/D. Rusch 1/1, v thru viii, 1-74. Class A Release. 19 and 29. Notice. Product Manual 83329440 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 the SCSI Interface information, order the Volume 2 Interface Manual, part 77738479.
Cheetah 36 Product Manual, Rev. B vii Table of Contents 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Applicable standards and reference documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.
viii Cheetah 36 Product Manual, Rev. B 6.5 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . 6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . 6.4.3 Effective altitude (sea level) . . . . . . . . . . . 6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . 6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . 6.4.6 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . 6.4.7 Electromagnetic susceptibility . . . . . . . . . Mechanical specifications . . . . . .
Cheetah 36 Product Manual, Rev. B 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. Cheetah 36 family drive (ST136403LW shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Cheetah 36 family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cheetah 36 Product Manual, Rev. B 1.0 1 Scope This manual describes Seagate Technology®, Inc. Cheetah 36™ disc drives. Cheetah 36 drives support the small computer system interface (SCSI) as described in the ANSI SCSI, SCSI2, 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 this and other families of Seagate drives.
Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 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). 2.3 Reference documents Cheetah 36 Installation Guide Seagate P/N 83329450 SCSI Interface Product Manual Seagate P/N 77738479 ANSI small computer system interface (SCSI) document numbers: X3.131-1994 SCSI-2 X3.
Cheetah 36 Product Manual, Rev. B 3.0 5 General description Cheetah 36 drives combine dual stripe magnetoresistive (DSMR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a wide Ultra2 SCSI interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. Ultra SCSI and Ultra2 SCSI use negotiated transfer rates.
6 Figure 2. Cheetah 36 Product Manual, Rev.
Cheetah 36 Product Manual, Rev. B 3.
8 Cheetah 36 Product Manual, Rev. B 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: ST136403 Formatted data block size 512 bytes/sector [1] Unformatted 43D6720h (36.40 GB) [2] 43.2 GB Notes. [1] [2] 3.6 Sector size selectable at format time.
Cheetah 36 Product Manual, Rev. B 9 4.0 Performance characteristics 4.1 Internal drive characteristics (transparent to user) ST136403 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 36.4 24 153,284–229,045 1,913 9,801 12,580 252 179-313 10,016 2.
10 Cheetah 36 Product Manual, Rev. B 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. Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using the spare sectors per sparing zone reallocation scheme.) Negligible Average rotational latency 2.99 msec Notes for Section 4.2. [1] [2] [3] [4] [5] 4.
Cheetah 36 Product Manual, Rev. B 11 number of segments) is still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is, the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. On a cache miss, all data transfers to the host are in accordance with buffer-full ratio rules.
12 Cheetah 36 Product Manual, Rev. B Tables 8 show Mode default settings for the drives. 4.5.2 Prefetch operation If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately 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 commands that request those logical blocks (this is true even if cache operation is disabled).
Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to Section 5.1.1.2 of the SCSI Interface Product Manual, part number 77738479, for Request Sense information. 5.2 Reliability and service You can enhance the reliability of Cheetah 36 disc drives by ensuring that the drive receives adequate cooling. Section 6.
Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 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.
Cheetah 36 Product Manual, Rev. B 6.0 19 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 36 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 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 21 +5 Volt Current, SCSI SE, during spindle start – Typical Amperes +5V Current (amps) AC Component A 1.0 0.5 Nominal (average) DC curve 0.0 T3 T4 T0 T2 T1 0.0 4 8 12 T5 16 20 24 28 32 Seconds Figure 4. Typical Cheetah 36 SCSI SE mode +5 V current profile +5 Volt Current, SCSI LVD, during spindle start – Typical Amperes +5V Current (amps) AC Component A 1.0 0.5 Nominal (average) DC curve 0.0 T3 T4 T0 T2 T1 0.
22 6.3 Cheetah 36 Product Manual, Rev. B Power dissipation For drives using single-ended interface circuits, typical power dissipation under idle conditions is 15.63 watts (53.3 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 15.73 watts (53.7 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see figures 6 and 7).
Cheetah 36 Product Manual, Rev. B 6.4 23 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.
24 Cheetah 36 Product Manual, Rev. B 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 U11 U12 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 Figure 8.
Cheetah 36 Product Manual, Rev. B 6.4.4 25 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.
26 Cheetah 36 Product Manual, Rev. B Z X Y X Figure 9.
Cheetah 36 Product Manual, Rev. B 6.4.4.2 27 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.
28 6.5 Cheetah 36 Product Manual, Rev. B 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 10 and 11 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.” Height: Width: Depth: Weight: 1.6 in 4.000 in 5.75 in 2.0 pounds 40.64 mm 101.6 mm 146.05 mm 0.
Cheetah 36 Product Manual, Rev. B 29 K // T -Z- S [1] H -Z- L J B R N -Z- -X- A -Z- Notes: [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). M U -X- P G A B C D E F G H J K L M N P R S T U [1] F E D C -X- Figure 11.
Cheetah 36 Product Manual, Rev. B 7.0 31 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).
32 Cheetah 36 Product Manual, Rev. B Table 4: 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 36 Product Manual, Rev. B 8.0 Note. 33 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.
34 Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 35 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. 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 Reserved Host N.
36 Cheetah 36 Product Manual, Rev. B 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 14. J2 option select header 8.1.1 Notes for Figures 12, 13, and 14. [1] (applies to “LW” model only; reserved on “LC” model) Term.
Cheetah 36 Product Manual, Rev. B 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. DS Off Off On WP On Off 37 Spindle starts immediately after power up - Default setting.
38 8.2 Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 8.4 39 Drive mounting When mounting the drive using the bottom holes (x-y plane in Figure 9) 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).
Cheetah 36 Product Manual, Rev. B 9.0 41 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 36. 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.
42 9.3 Cheetah 36 Product Manual, Rev. B SCSI interface commands supported Table 6 following lists the SCSI interface commands that are supported in the SCSI-2, and SCSI-3 modes of the drive. Cheetah 36 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.
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44 Cheetah 36 Product Manual, Rev.
Cheetah 36 Product Manual, Rev. B 45 Table 7 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 77738479, Section 5.1.1.3.
46 9.3.2 Cheetah 36 Product Manual, Rev. B 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 36 Product Manual, Rev. B 47 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 SCSI Interface Product Manual, part number 77738479). Definitions: Note. 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.
48 9.4 Cheetah 36 Product Manual, Rev. B 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 77738479, for details.
Cheetah 36 Product Manual, Rev. B 49 9.5 Synchronous data transfer 9.5.1 Synchronous data transfer periods supported Table 10 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 77738479.
50 Cheetah 36 Product Manual, Rev. B 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 16. ST136403LW drive physical interface (68-pin J1 SCSI I/O connector) 80-pin SCSI I/O Connector Pin 1 J2 J6 Figure 17.
Cheetah 36 Product Manual, Rev. B 9.6.2 51 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.
52 Cheetah 36 Product Manual, Rev. B cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at FAST-20 and FAST-40 SCSI transfer rates. Note. For LVD operation, twisted pair cables are recommended. For LVD Fast-40 operation, twisted pair cables are strongly recommended. For Fast-80 operation, twisted pair cables are required.
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54 Cheetah 36 Product Manual, Rev. B 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 19. Nonshielded 68 pin SCSI device connector used on LW drives .085 x 45° chamfer (2.16) typ Pos. 1 .767 (19.48) 1 .315 ± .
Cheetah 36 Product Manual, Rev. B 55 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 20.
56 Cheetah 36 Product Manual, Rev. B Table 12: Note. LW 68-conductor single-ended (SE) P cable signal/pin assignments [13] A minus sign preceding a signal name indicates that signal is active low.
Cheetah 36 Product Manual, Rev. B Table 13: Note. 57 LW 68-conductor LVD P cable signal/pin assignments [13] A minus sign preceding a signal name indicates that signal is active low.
58 Cheetah 36 Product Manual, Rev. B Table 14: Note. LC 80-pin single-ended (SE) I/O connector pin assignments [13] A minus sign preceding a signal name indicates that signal is active low.
Cheetah 36 Product Manual, Rev. B Table 15: Note. 59 LC 80-pin single-ended (LVD) I/O connector pin assignments [13] A minus sign preceding a signal name indicates that signal is active low.
60 Cheetah 36 Product Manual, Rev. B Notes [ ] for Tables 12 through 15. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] 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. Connector contacts are on 0.050 inch (1.27 mm) centers.
Cheetah 36 Product Manual, Rev. B 61 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.
62 9.7.1.1 Cheetah 36 Product Manual, Rev. B 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 16 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.
Cheetah 36 Product Manual, Rev. B 9.10 Disc drive SCSI timing Table 17: Disc drive SCSI timing 63 These values are not current Cheetah 36 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 4.5-3 3.
64 Cheetah 36 Product Manual, Rev. B Table 17: Disc drive SCSI timing (Continued) These values are not current Cheetah 36 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.
Cheetah 36 Product Manual, Rev. B 10.0 65 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.shtml or DiscPresales@Seagate.com Tape: http://www.seagate.com/support/email/email_tape_presales.shtml or Tape_Sales_Support@Seagate.com Technical Support: Disc: http://www.seagate.
66 Cheetah 36 Product Manual, Rev.
Cheetah 36 Product Manual, Rev. B 67 Fax Services—All European Countries Presales/Technical Support/Warranty Repair 31-20-653-3513 Africa/Middle East Support Services For presales, technical support, warranty repair 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. (European central time) Monday through Friday, or send a FAX to +31-20-653-3513. The European call center is located in Amsterdam, The Netherlands.
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70 DC cable and connector 49 DC current 51 DC power 10, 13, 37, 49 DC power carrying conductor 52 DC power connector 49 DC power requirements 19 DC power source 52 dedicated landing zone 5 default 36, 37 default mode parameter 33 default value 46, 47 defect/error management 31 delayed motor start option 19, 60 delayed start 37 depot repair 15 depot repair philosophy 15 diagnostics 20 differential I/O circuit 37 differentiating features 5 dimensions 28 disable read ahead 12 disc access 10 disc media 9 disc r
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72 operating environment 14 operating option 33 operating parameter 46 operator intervention 13 option jumper 33 option jumper location 33 option select header 49 option select jumper 33 options 8 orientation 10, 25, 38 out-of-plane deflection 39 out-of-plane distortion 39 Output characteristics 60 P package size 25 package test specification 4 packaged 25 parity 37 parity checking 37 parity error 37 partition or logical drive 33 PCB 15, 36, 38 temperature 23 PCBA 33, 39, 46, 49, 51, 53 PCBA circuit run 51
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74 unrecoverable 13 write operation 11 write protect 37 write retry count 31 Z zoned bit recording (ZBR) 7 Cheetah 36 Product Manual, Rev.
Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329440, Rev.
