Seagate ST39204LC - Cheetah 9.2 GB Hard Drive Product Manual
  1. Manuals
  2. Brands
  3. Seagate Manuals
  4. Storage
  5. ST39204LC - Cheetah 9.2 GB Hard Drive
  6. Product manual
Seagate ST39204LC - Cheetah 9.2 GB Hard Drive Product Manual

Seagate ST39204LC - Cheetah 9.2 GB Hard Drive Product Manual

Product manual
Hide thumbs Also See for ST39204LC - Cheetah 9.2 GB Hard Drive:
Table of Contents

Advertisement

Quick Links

Download this manual
Enlarged version
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cheetah 18XL Family:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST318404LW/LC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST39204LW/LC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual, Volume 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ST39204LC - Cheetah 9.2 GB Hard Drive and is the answer not in the manual?

Questions and answers

Related Manuals for Seagate ST39204LC - Cheetah 9.2 GB Hard Drive

Summary of Contents for Seagate ST39204LC - Cheetah 9.2 GB Hard Drive

  • Page 1 ..........Cheetah 18XL Family: .
  • Page 3 ..........Cheetah 18XL Family: .
  • Page 4 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. No part of this publica- tion may be reproduced in any form without written permission of Seagate Technology LLC.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 2/16/2000 L. Newman/B. Reynolds 1/1, v thru viii, 1-82. Rev. B 02/06/2001 K. Schweiss/B. Reynolds Rev. C 03/19/2001 K. Schweiss/B. Reynolds Rev. D 04/12/2001 K. Schweiss/B. Reynolds 4, 15, and 59. Rev.

  • Page 7: Table Of Contents

    Cheetah 18XL Product Manual, Rev. G Table of Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate Technology support services........
  • Page 9 Cheetah 18XL Product Manual, Rev. G List of Figures Figure 1. Cheetah 18XL family drive (ST318404LC shown) ........1 Figure 2.

  • Page 11: Scope

    The SCSI Interface Product Manual , part num- ber 75789509, describes general SCSI interface characteristics of this and other families of Seagate drives. The SCSI Interface Product Manual references information from the documents listed in Section 2.3.
  • Page 12 Cheetah 18XL Product Manual, Rev. G...

  • Page 13: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Cheetah 18XL family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual , part number 75789509.

  • Page 14: Reference Documents

    (EMI/EMS) for Class B products. • EUT name (model numbers): ST318404LC, ST318404LW, ST39204LC, ST39204LW • Certificate number: E-H011-00-5479 (B), E-H011-00-5478 (B), E-H011-00-5477 (B), E-H011-00-5476 (B) • Trade name or applicant: Seagate Technology International • Manufacturing start date: February 2000 • Manufacturer/nationality: Singapore Taiwanese BSMI If this model has two Chinese words meaning “EMC certification”...

  • Page 15: General Description

    (Volume 1), which defines the product performance char- acteristics of the Cheetah 18XL family of drives, and the SCSI Interface Product Manual , part number 75789509, which describes the general interface characteristics of this and other families of Seagate SCSI drives.

  • Page 16: Figure 2. Cheetah 18Xl Family Drive

    Cheetah 18XL Product Manual, Rev. G A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides excellent performance with minimal power dissipation. Cheetah 18XL Figure 2. family drive...

  • Page 17: Standard Features

    Cheetah 18XL Product Manual, Rev. G Standard features The Cheetah 18XL family has the following standard features: • Integrated Ultra160 SCSI controller • Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD) • 16 bit I/O data bus •...

  • Page 18: Unformatted And Formatted Capacities

    Cheetah 18XL Product Manual, Rev. G 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: Formatted data block size 512 bytes/sector [1] ST318404 222EE55h (18.352 GB) [2]...

  • Page 19: Performance Characteristics

    Cheetah 18XL Product Manual, Rev. G Performance characteristics Internal drive characteristics (transparent to user) ST318404 ST39204 Drive capacity 18.352 9.176 GByte (formatted, rounded off values) Read/write heads Bytes/track 203,008 203,008 Bytes (average, rounded off values) Bytes/surface 3,058 3,058 Mbytes (unformatted, rounded off values) Tracks/surface (total) 14,384 14,384...

  • Page 20: Start/Stop Time

    Cheetah 18XL Product Manual, Rev. G Sector Sizes: Default 512 byte user data blocks Variable 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 Flaw reallocation performance impact (for flaws reallocated at format time using Negligible...

  • Page 21: Caching Write Data

    Cheetah 18XL Product Manual, Rev. G command is retrieved from the buffer (if it is there), before any disc access is initiated. If cache operation is not enabled, the buffer (still segmented with required number of segments) is still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch operation for the moment).

  • Page 22: Prefetch Operation

    Cheetah 18XL Product Manual, Rev. G 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.

  • Page 23: Reliability Specifications

    Cheetah 18XL Product Manual, Rev. G Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4). Seek Errors Less than 10 in 10 seeks Read Error Rates [1] Recovered Data...

  • Page 24: Reliability And Service

    Cheetah 18XL Product Manual, Rev. G 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.

  • Page 25: Preventive Maintenance

    Case 4 - Current I/O process allowed during insertion or removal, except on the device being changed Seagate Cheetah 18XL disc drives support all four hot plugging cases. Provision shall be made by the system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus.

  • Page 26: S.m.a.r.t

    Cheetah 18XL Product Manual, Rev. G 5.2.8 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicate a drive failure and is designed to provide sufficient warning of a failure to allow data back-up before an actual failure occurs.

  • Page 27: Drive Self Test (Dst)

    DST. It is the responsibility of the host application to determine the “not ready” cause. While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.
  • Page 28 Cheetah 18XL Product Manual, Rev. G • Servo will not lock on track • Drive cannot read configuration tables from the disc In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code. 5.2.9.2.2 Invoking DST To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short...

  • Page 29: Product Warranty

    Seagate’s option and at no charge to customer, if returned by customer at cus- tomer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate will pay for transporting the repair or replacement item to customer.
  • Page 30 Cheetah 18XL Product Manual, Rev. G...

  • Page 31: Physical/Electrical Specifications

    Cheetah 18XL Product Manual, Rev. G Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah 18XL drive. AC power requirements None. 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.

  • Page 32: Conducted Noise Immunity

    Cheetah 18XL Product Manual, Rev. G 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 con- nector.

  • Page 33: Figure 3. Typical St318404 Drive +12 V Current Profile

    Cheetah 18XL Product Manual, Rev. G +12 Volt Current during spindle start – Typical Amperes AC Envelope Nominal (average) DC curve Seconds Figure 3. Typical ST318404 drive +12 V current profile +12 Volt Current during spindle start – Typical Amperes AC Envelope Nominal (average) DC curve...

  • Page 34: Figure 5. Typical St318404 Drive +5 V Current Profile

    Cheetah 18XL Product Manual, Rev. G +5 Volt Current during spindle start – Typical Amperes Nominal (average) DC curve Seconds Figure 5. Typical ST318404 drive +5 V current profile +5 Volt Current during spindle start – Typical Amperes Nominal (average) DC curve Seconds Figure 6.

  • Page 35: Power Dissipation

    Cheetah 18XL Product Manual, Rev. G Power dissipation ST318404 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 8.5 watts (29.0 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8.5 watts (29.0 BTUs per hour).

  • Page 36: Figure 9. St39204 Dc Current And Power Vs. Input/Output Operations Per Second (Se)

    Cheetah 18XL Product Manual, Rev. G ST39204 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 7.0 watts (23.8 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.0 watts (23.8 BTUs per hour).

  • Page 37: Environmental Limits

    Cheetah 18XL Product Manual, Rev. G 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).

  • Page 38: Relative Humidity

    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.

  • Page 39: Shock And Vibration

    36 in (914 mm) Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or...

  • Page 40: Figure 12. Recommended Mounting

    Cheetah 18XL Product Manual, Rev. G Figure 12. Recommended mounting...

  • Page 41: Air Cleanliness

    There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea- sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.

  • Page 42: Mechanical Specifications

    Cheetah 18XL Product Manual, Rev. G 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 13 and 14 for detailed mounting configuration dimensions.

  • Page 43: Figure 14. St318404Lc Mounting Configuration Dimensions

    Cheetah 18XL Product Manual, Rev. G Notes: Mounting holes are 6-32 UNC 2B, three -Z- -X- 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.
  • Page 44 Cheetah 18XL Product Manual, Rev. G...

  • Page 45: Defect And Error Management

    Cheetah 18XL Product Manual, Rev. G 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).

  • Page 46: Scsi Systems Errors

    Cheetah 18XL Product Manual, Rev. G Table 4: Read and write retry count maximum recovery times [1] Read retry Maximum recovery time per Write retry Maximum recovery time per count [1] LBA (cumulative, msec) count LBA (cumulative, msec) 77.61 65.67 89.55 83.58 304.47...

  • Page 47: Installation

    • Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary see Section 10 for Seagate support services telephone numbers. • Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as the manufacturer labels contain information required when servicing the product.

  • Page 48: Figure 15. J6 Jumper Header

    Cheetah 18XL Product Manual, Rev. G Drive Front Jumper Plug (enlarged to show detail) Pin 1 Reserved A 2 A 1 A 0 SCSI ID = 0 (default) SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6...

  • Page 49: Figure 16. J5 Jumper Header (On Lw Models Only)

    Cheetah 18XL Product Manual, Rev. G Drive HDA (rear view, PCB facing downward) [1] [2] Pin 1 +5V Ground Pin 1 J1-DC Power 68 Pin SCSI ID = 0 (default) SCSI I/O Connector SCSI ID = 1 SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5...

  • Page 50: Notes For Figures 15, 16, And 17

    Cheetah 18XL Product Manual, Rev. G Pin 1 Jumper Positions Force single-ended bus mode Delay Motor Start Enable Remote Motor Start Write Protect Parity Disable Reserved Additional notes on these (applies to “LW” model only; Term. Power to SCSI Bus functions in section 8.1.2.

  • Page 51: Function Description

    Cheetah 18XL Product Manual, Rev. G 8.1.2 Function description jumper installation 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, depend- ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed. Spindle starts immediately after power up - Default setting.

  • Page 52: Drive Orientation

    Cheetah 18XL Product Manual, Rev. G Drive orientation The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor- mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations.

  • Page 53: Drive Mounting

    (F) is applied to the fourth point. Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech- nology that the drive can meet the shock and vibration specifications given herein while mounted in such an adapter frame.
  • Page 54 Cheetah 18XL Product Manual, Rev. G...

  • Page 55: Interface Requirements

    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. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual , part number 75789509.

  • Page 56: Scsi Interface Commands Supported

    Cheetah 18XL Product Manual, Rev. G Notes. Extended messages (see the SCSI Interface Product Manual, part number 75789509). Supports all options except qas_req and iu_req. SCSI interface commands supported Table 6 following lists the SCSI interface commands that are supported by the drive. Cheetah 18XL Family drives can be changed back and forth between SCSI-1, SCSI-2, and SCSI-3 (Ultra160) modes using the Change Definition Command.
  • Page 57 Cheetah 18XL Product Manual, Rev. G Table 6: Commands supported by Cheetah 18XL family drive (Continued) Command Supported by Command name code SCSI-2/3 Factory log page (3Eh) Mode select (same pages as Mode Sense 1Ah) Y [2] Mode select (10) (same pages as Mode Sense 1Ah) Mode sense Y [2] Caching parameters page (08h)
  • Page 58 Cheetah 18XL Product Manual, Rev. G Table 6: Commands supported by Cheetah 18XL family drive (Continued) Command Supported by Command name code SCSI-2/3 Seek Seek extended 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...

  • Page 59: Inquiry Vital Product Data

    Cheetah 18XL Product Manual, Rev. G 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 75789509, Inquiry command section. Table 7: Cheetah 18XL family drive Standard Inquiry data Bytes Data (HEX)

  • Page 60: Mode Sense Data

    Cheetah 18XL Product Manual, Rev. G 9.3.2 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 Change- able values.
  • Page 61 Cheetah 18XL Product Manual, Rev. G Table 8: Mode sense data, ST318404 values Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 14 15 16 17 18 19 20 21 22 23 Mode Sense Data 9F 00 10 08 02 22 EE 56 00 00 02 00 Mode...
  • Page 62 Cheetah 18XL Product Manual, Rev. G mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi- tion 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.
  • Page 63 Cheetah 18XL Product Manual, Rev. G Table 9: Mode sense data, ST39204 values Bytes 03 04 05 06 07 08 09 10 11 12 14 15 16 17 18 19 20 21 22 23 Mode Sense Data 08 01 11 77 2B 00 00 02 00 Mode <------------------------------Mode Page Headers and Parameter Data Bytes---------------------------->...
  • Page 64 Cheetah 18XL Product Manual, Rev. G mode), the SCSI firmware is performance optimized for desktop applications. The firmware default condi- tion 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.

  • Page 65: Scsi Bus Conditions And Miscellaneous Features Supported

    Cheetah 18XL Product Manual, Rev. G SCSI bus conditions and miscellaneous features supported Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here.

  • Page 66: Synchronous Data Transfer

    Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual , part number 75789509. 9.6.1...

  • Page 67: Figure 19. Lw Model Drive Physical Interface (68-Pin J1 Scsi I/O Connector)

    Cheetah 18XL Product Manual, Rev. G Power +12V +12V ret + 5V ret + 5V Pin 1 Pin 1 J1-DC Power PCBA J1-DC Power Pin 1P Pin 1 Pin 1 68 Pin SCSI I/O Connector Figure 19. LW model drive physical interface (68-pin J1 SCSI I/O connector) 80 Pin SCSI I/O and Power Connector...

  • Page 68: Scsi Interface Physical Description

    Cheetah 18XL Product Manual, Rev. G 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 stan- dards.

  • Page 69: Mating Connectors

    Cheetah 18XL Product Manual, Rev. G 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. Proper impedance matching is especially important in order to maintain adequate margin at FAST-20 and FAST-40 SCSI transfer rates.

  • Page 70: Figure 21. Scsi Daisy Chain Interface Cabling For Lw Drives

    2-557103-2 787311-2 without polarization 94-0680-02-2 Amp Japan P/N: 5-175475-9 Right-angle to PCBA connectors Seagate P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9 For additional information call Amp FAX service at 1-800-522-6752. “LW” Model Note. Do not mix drives operating...

  • Page 71: Figure 22. Nonshielded 68 Pin Scsi Device Connector Used On Lw Drives

    Cheetah 18XL Product Manual, Rev. G 3.650±.005 .346 .270 . 1 55 1.650 .3937 .600 .050 .0787 .200 .022 .020 .047 (15.24) .519 (13.18) (5.08) .100 Pos. 1.816 .315 .085 (2.54) (46.13) Pos. Position 1 x 45° chamfer (8.00) (2.16) .315 ±...

  • Page 72: Figure 23. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On Lc Drives

    Cheetah 18XL Product Manual, Rev. G 7.00 (.276) 12.70 End View (.500) Grounding Pins 2.15±0.10 2 places 57.87 (2.278) –0.15 + .000 – .006 0.15 M Y M C L of Datum Y –Y– Front View Pin 1 ± 0.15 62.15 (2.447) (±...
  • Page 73 Cheetah 18XL Product Manual, Rev. G Table 13: LW 68-conductor single-ended (SE) P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Cable conductor Signal contact contact Signal number [2] name [1] number [3] number [3]...
  • Page 74 Cheetah 18XL Product Manual, Rev. G Table 14: LW 68-conductor LVD P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Connector Cable conductor Signal contact contact Signal number [2] name [1] number [3] number [3]...
  • Page 75 Cheetah 18XL Product Manual, Rev. G Table 15: LC 80-pin single-ended (SE) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...
  • Page 76 Cheetah 18XL Product Manual, Rev. G Table 16: LC 80-pin single-ended (LVD) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low. Connector Signal contact Signal Contact name [1] number [3] number [3] name[1] 12 V CHARGE...

  • Page 77: Electrical Description

    Cheetah 18XL Product Manual, Rev. G Notes [ ] for Tables 13 through 16. 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.

  • Page 78: Figure 24. Lvd Output Signals

    Cheetah 18XL Product Manual, Rev. G The output characteristics shall additionally conform to EIA RS-485. 100Ω –SIGNAL STEADY STATE LOGIC INPUT (1 OR 0) 75Ω 100Ω +SIGNAL MEASURED PARAMETER DEVICE CONNECTOR Figure 24. LVD output signals Input characteristics Each signal (Vs) received by LVD interface receiver circuits shall have the following input characteristics when measured at the disk drive connector: Steady state Low level output voltage* = 0.030 V = <...

  • Page 79: Terminator Requirements

    Cheetah 18XL Product Manual, Rev. G 9.7.1.1 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.

  • Page 80: Disc Drive Scsi Timing

    Cheetah 18XL Product Manual, Rev. G 9.10 Disc drive SCSI timing Table 18: Disc drive SCSI timing Waveform Waveform Description symbol [1] table [1] Typical timing <1 µs Target Select Time (no Arbitration) 1.93 µs Target Select Time (with Arbitration) 4.5-1,2 3.77 µs Target Select to Command...

  • Page 81: Drive Activity Led

    Cheetah 18XL Product Manual, Rev. G Table 18: Disc drive SCSI timing (Continued) Waveform Waveform Description symbol [1] table [1] Typical timing 0.04 µs Data In Byte Transfer (parameter) 4.5-12 0.04 µs Data Out Byte Transfer (parameter) 4.5-13 0.12 µs Next Data In Byte Access (parameter) 4.5-12 0.12 µs...
  • Page 82 Cheetah 18XL Product Manual, Rev. G...

  • Page 83: Seagate Technology Support Services

    FAX 24 hours daily. Presales Support Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system. Technical Support If you need help installing your drive, consult your dealer. Dealers are familiar with their unique system configu- rations and can help you with system conflicts and other technical issues.
  • Page 84 Cheetah 18XL Product Manual, Rev. G 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.
  • Page 85 Cheetah 18XL Product Manual, Rev. G Spain 900-98 31 24 Sweden 0 207 90 073 Switzerland 0 800-83 84 11 Turkey 00 800-31 92 91 40 United Kingdom 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 .
  • Page 86 Cheetah 18XL Product Manual, Rev. G...
  • Page 87 Cheetah 18XL Product Manual, Rev. G Index bytes/track 9 Symbols cabinet cooling 42 cable 56 +5 and +12 volt supplies 21 cache 10 Numerics cache buffer 7 cache miss 11 68 conductor connector 59 cache mode 10 68 pin connector 60 cache operation 10 80 conductor connector 59 cache operation hit 12...
  • Page 88 Cheetah 18XL Product Manual, Rev. G DC current 58 DC power 10 ECC 13 DC power carrying conductor 59 ECC correction capability 7 DC power connector 56 electrical characteristics 56 DC power requirements 21 electromagnetic compatibility 3 DC power source 59 electromagnetic interference (EMI) 13 dedicated landing zone 5 electromagnetic susceptibility 31...
  • Page 89 Cheetah 18XL Product Manual, Rev. G head and disc assembly. See HDA LVD 67 heat removal 42 LVD interface receiver circuits 68 heat source 42 LVD output signals 68 high level format 37 host 12 host adapter 37 magnetoresistive heads 5 adapter/initiator 60 mating connector 56 host backplane wiring 58...
  • Page 90 Cheetah 18XL Product Manual, Rev. G prefetch data 12 prefetch field 12 office environment 31 prefetch hit 12 operating 28 prefetch mode 10 operating environment 14 prefetch of contiguous blocks 12 operating option 37 prefetch operation 10 operating parameter 50 prefetch segmented cache control 10 operator intervention 13 preventive maintenance 13...
  • Page 91 SCSI systems error consideration 35 SCSI systems error management 36 SCSI Ultra160 implementation 50 Taiwanese Bureau of Standards, Metrology, and In- SE 67 spection 4 Seagate support service 37 technical support services 73 sector 11 temperature 10 sector interleave 9 ambient 27...
  • Page 92 Cheetah 18XL Product Manual, Rev. G wide Ultra160 SCSI interface 5 WP jumper 41 wrap-around 11 write caching 11 write error 13 unrecoverable 13 write operation 11 write protect 41 write retry count 35 zoned bit recording (ZBR) 7...
  • Page 94 Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 75789506, Rev. G, Printed in USA...

This manual is also suitable for:

Cheetah 18xl seriesSt318404lwSt318404lcSt39204lw

Table of Contents