Seagate ST318451LW Product Manual
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Seagate ST318451LW Product Manual

Seagate ST318451LW Product Manual

Cheetah x15 disc drive
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Cheetah X15 Disc Drive:
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ST318451LW/LC
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ST39251LC
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Product Manual, Volume 1
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  • Page 1 ..........ST318451LW/LC .
  • Page 3 ..........ST318451LW/LC .
  • Page 4 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology, LLC. Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either trademarks or registered trade- marks of Seagate Technology, LLC. or one of its subsidiaries. All other trademarks or registered trade- marks are the property of their respective owners.
  • Page 5 Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. B (Class A Release) 05/01/2000 L. Newman/G. Velaski 1/1, v thru viii, 1 thru 80, and back cover Rev. C 07/12/2000 K. Schweiss/G. Velaski front cover, 9, 13, 15, 17, 18, 40, 41, 45, 47, 49, 56, 57, 59, 60, 62-65, 67-69, 74, 76, and back cover.

  • Page 7: Table Of Contents

    Cheetah X15 Product Manual, Rev. C Contents Scope ................1 Applicable standards and reference documentation.
  • Page 8 Seagate Technology support services........
  • Page 9 Cheetah X15 family drive (ST318451LW shown) ........

  • 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. From this point on in this product manual the reference to Cheetah X15 models is referred to as “the drive”...
  • Page 12 Cheetah X15 Product Manual, Rev. C...

  • Page 13: Applicable Standards And Reference Documentation

    Mounting by bottom holes must meet the requirements of Section 8.4. Standards The Cheetah X15 family complies with Seagate standards as noted in the appropriate sections of this Manual and the Seagate SCSI Interface Product Manual, part number 75789509 (Vol. 2).

  • Page 14: Reference Documents

    T10/1302D SPI-3 (SCSI Parallel Interface version 3) SFF-8046 Specification for 80-pin connector Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001 In case of conflict between this document and any referenced document, this document takes precedence.

  • Page 15: General Description

    (volume 1), which defines the product performance char- acteristics of the Cheetah X15 family of drives, and the SCSI Interface Product Manual (volume 2), part num- ber 75789509, which describes the general interface characteristics of this and other families of Seagate SCSI drives.

  • Page 16: Figure 2. Cheetah X15 Family Drive (Exploded View)

    Cheetah X15 Product Manual, Rev. C Cheetah X15 Figure 2. family drive (exploded view)

  • Page 17: Standard Features

    Cheetah X15 Product Manual, Rev. C Standard features The Cheetah X15 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 X15 Product Manual, Rev. C 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] Unformatted ST318451...

  • Page 19: Performance Characteristics

    Cheetah X15 Product Manual, Rev. C Performance characteristics Internal drive characteristics (transparent to user) ST318451 ST39251 Drive capacity 18.35 GByte (formatted, rounded off values) Read/write heads Bytes/track 176,843 176,843 Bytes (average, rounded off values) Bytes/surface 1,835 1,835 Mbytes (unformatted, rounded off values) Tracks/surface (total) 10,377 10,377...

  • Page 20: Start/Stop Time

    Cheetah X15 Product Manual, Rev. C Sector Sizes: Default 512 byte user data blocks Variable 512 to 2,064 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 X15 Product Manual, Rev. C requested by the host with a Read 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 oper- ation for the moment).

  • Page 22: Prefetch Operation

    Cheetah X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 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 X15 Product Manual, Rev. C 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: Thermal Monitor

    If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test, remove it from service and return it to Seagate for service.
  • Page 28 To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short test or 010b for the extended test) in bytes 1, bits 5, 6, and 7. Refer to the Seagate SCSI Interface Manual, Vol- ume 3, part number 75789509 for additional information about invoking DST.

  • 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 X15 Product Manual, Rev. C...

  • Page 31: Physical/Electrical Specifications

    Cheetah X15 Product Manual, Rev. C Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Cheetah X15 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 X15 Product Manual, Rev. C 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 St318451 Drive +12 V Current Profile

    Cheetah X15 Product Manual, Rev. C +12 Volt Current during spindle start – Typical Amperes AC Envelope DC average of waveform T0 T1 T3 T4 Seconds Figure 3. Typical ST318451 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes Nominal (average) DC curve AC Envelope Seconds...

  • Page 34: Figure 5. Typical St39251 Drive +12 V Current Profile

    Cheetah X15 Product Manual, Rev. C +12 Volt Current during spindle start – Typical Amperes AC Envelope DC average of waveform T0 T1 Seconds Figure 5. Typical ST39251 drive +12 V current profile +5 Volt Current during spindle start – Typical Amperes Nominal (average) DC curve AC Envelope Seconds...

  • Page 35: Power Dissipation

    Cheetah X15 Product Manual, Rev. C Power dissipation ST318451 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.32 watts (35.2 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.7 watts (36.6 BTUs per hour).

  • Page 36: Figure 9. St39251 Dc Current And Power Vs. Input/Output Operations Per Second (Se)

    Cheetah X15 Product Manual, Rev. C ST39251 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.32 watts (35.2 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.7 watts (36.6 BTUs per hour).

  • Page 37: Environmental Limits

    Cheetah X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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. Lc Mounting Configuration Dimensions

    Cheetah X15 Product Manual, Rev. C Notes: Dimension Table Figure 14. LC mounting configuration dimensions...
  • Page 44 Cheetah X15 Product Manual, Rev. C...

  • Page 45: Defect And Error Management

    Cheetah X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C Table 5: 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) 52.4 24.2 60.4 36.3 205.5...

  • Page 47: Installation

    J2, J5-Auxiliary and J6. Suggested part number for the jumpers used on J2 is Molex 52747-0211 (Seagate part number 77679052). A bag with the two jumper plug types is shipped with the standard OEM drives.

  • Page 48: Figure 15. J6 Jumper Header

    Cheetah X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C...

  • 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.

  • Page 56: Scsi Interface Commands Supported

    Cheetah X15 Product Manual, Rev. C SCSI interface commands supported Table 7 following lists the SCSI interface commands that are supported by the drive. Cheetah X15 Family drives can be changed back and forth between SCSI-1, SCSI-2, and SCSI-3 modes using the Change Defini- tion Command.
  • Page 57 Cheetah X15 Product Manual, Rev. C Table 7: Commands supported by Cheetah X15 family drive (Continued) Command Supported by Command name code SCSI-2/3 Mode sense Y [2] Caching parameters page (08h) Control mode page (0Ah) Disconnect/reconnect (02h) Error recovery page (01h) Format page (03h) Information exceptions control page (1Ch) Notch and Partition Page (0Ch)
  • Page 58 Cheetah X15 Product Manual, Rev. C Table 7: Commands supported by Cheetah X15 family drive (Continued) Command Supported by Command name code SCSI-2/3 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...

  • Page 59: Inquiry Vital Product Data

    S# Eight ASCII digits representing the eight digits of the product serial number. Bytes 18 through 26 reflect model of drive. Shown here are hex values for Model ST318451LW. For “LC” models, bytes 24, 25 and 26 are 4C 43 20.

  • Page 60: Mode Sense Data

    Cheetah X15 Product Manual, Rev. C 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 X15 Product Manual, Rev. C The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com- mand pages for SCSI Ultra160 implementation (see the SCSI Interface Product Manual). Definitions: DEF = Default value.
  • Page 62 Cheetah X15 Product Manual, Rev. C Table 10: ST39251 Mode sense data Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Mode A3 00 10 08 01 11 77 2C 00 00 02 00 Sense Data Mode...

  • Page 63: Scsi Bus Conditions And Miscellaneous Features Supported

    Cheetah X15 Product Manual, Rev. C 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 64: Synchronous Data Transfer

    DC cable and connector ST318451LW drives receive DC power through a 4 pin connector (see Figure 21 for pin assignment) mounted at the rear of the main PCBA. Recommended part numbers of the mating connector are listed below, but equiv- alent parts may be used.

  • Page 65: Figure 19. Lw Model Drive Physical Interface (68-Pin J1 Scsi I/O Connector)

    Cheetah X15 Product Manual, Rev. C Power +12V +12V ret + 5V ret + 5V Pin 1 Pin 1A J1-DC Power J1-DC Power Pin 1P Pin 1A 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 Connector...

  • Page 66: Scsi Interface Physical Description

    Cheetah X15 Product Manual, Rev. C 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 T10/1302D revision 14, and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 stan- dards.

  • Page 67: Mating Connectors

    Cheetah X15 Product Manual, Rev. C 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.
  • Page 68 Cheetah X15 Product Manual, Rev. C To insure that both drive connector and host equipment mating connector mate properly, both drive connector and host equipment mating connector must meet the provisions of “SFF-8046 Specification for 80-pin connec- tor for SCSI Disk Drives.”...

  • Page 69: Figure 21. Scsi Daisy Chain Interface Cabling For Lw Drives

    Cheetah X15 Product Manual, Rev. C Recommended mating 80-position PCBA mount connectors: Straight-in connector Hot plug version (with ground guide-pin) Seagate P/N: 77678703 Amp US P/N: 2-557103-1 787311-1 with polarization 94-0680-02-1 Amp US P/N: 2-557103-2 787311-2 without polarization 94-0680-02-2 Amp Japan P/N: 5-175475-9...

  • Page 70: Figure 22. Nonshielded 68 Pin Scsi Device Connector Used On Lw Drives

    Cheetah X15 Product Manual, Rev. C 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 71: Figure 23. Nonshielded 80 Pin Scsi "Sca-2" Connector, Used On Lc Drives

    Cheetah X15 Product Manual, Rev. C 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 62.15 – 0.15 (2.447) (–...
  • Page 72 Cheetah X15 Product Manual, Rev. C Table 15: 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 73 Cheetah X15 Product Manual, Rev. C Table 16: 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 74 Cheetah X15 Product Manual, Rev. C Table 17: 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 75 Cheetah X15 Product Manual, Rev. C Table 18: 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 76: Electrical Description

    Cheetah X15 Product Manual, Rev. C Notes [ ] for Tables 15 through 18. 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 77: Figure 24. Lvd Output Signals

    Cheetah X15 Product Manual, Rev. C The output characteristics shall additionally conform to EIA RS-485. LVD Differential Driver 1.55V —15ma Signal + = True / Logic 1 / Assertion .95V +15ma Signal — LVD Differential Driver .95V +15ma Signal + = False / Logic 0 / Negation 1.55V —15ma...

  • Page 78: Terminator Requirements

    Cheetah X15 Product Manual, Rev. C Table 19: Cable characteristics for single-ended circuits Transmission line impedance Maximum number of maximum cable I/O transfer rate REQ/ACK Other signals devices on the bus length allowed <10M transfers/s 16 (wide SCSI bus) 6 meters (19.7 ft) 90 + 6 Ohms 90 + 10 Ohms <20M transfers/s...

  • Page 79: Disc Drive Scsi Timing

    Cheetah X15 Product Manual, Rev. C 9.10 Disc drive SCSI timing Table 20: Disc drive SCSI timing These values are not current Cheetah X15 values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing Target Select Time (no Arbitration) <1 s Target Select Time (with Arbitration)

  • Page 80: Drive Activity Led

    Cheetah X15 Product Manual, Rev. C Table 20: Disc drive SCSI timing (Continued) These values are not current Cheetah X15 values, but are listed for information only. Waveform Waveform Description symbol [1] table [1] Typical timing Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 s ±1 s...

  • Page 81: Seagate Technology Support Services

    FAX 24 hours daily. This service is available worldwide. 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. Disc: 1-877-271-3285; Tape: 1-800-626-6637; Server Appliance: 1-800-732-4283.
  • Page 82 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. If you need additional help, you can talk to a Seagate technical support specialist. Before calling, note your system configuration and drive model number (ST####).
  • Page 83 Cheetah X15 Product Manual, Rev. C European Support Services For European customer support, dial the toll-free number for your specific country for presales support, techni- cal support, SeaFAX and warranty service. If your country is not listed here, dial our European call center at +31-20-316-7222 from 8:30 .
  • Page 84 Cheetah X15 Product Manual, Rev. C...
  • Page 85 Cheetah X15 Product Manual, Rev. C Index bytes/track 9 Symbols cabinet cooling 42 +5 and +12 volt supplies 21 cable 54 cache 10 Numerics cache buffer 7 cache miss 11 68 conductor connector 57 cache mode 10 68-pin connector 59 cache operation 10 80 conductor connector 57 cache operation hit 12...
  • Page 86 Cheetah X15 Product Manual, Rev. C DC power carrying conductor 57 electrical characteristics 54 DC power connector 54 electromagnetic compatibility 3 DC power requirements 21 electromagnetic interference (EMI) 13 DC power source 57 electromagnetic susceptibility 31 dedicated landing zone 5 embedded servo 7 default 40 EMC compliance 3...
  • Page 87 Cheetah X15 Product Manual, Rev. C host 12 maximum current requirements 22 host adapter 37 maximum operating current 21 adapter/initiator 59 maximum starting current 21 host backplane wiring 56 ME jumper 41 host equipment 43 mean time between failure. See MTBF DC power 57 media 7 host I/O signal 37...
  • Page 88 Cheetah X15 Product Manual, Rev. C option select header 54 product data page 49 option select jumper 37 programmable drive capacity 8 options 8 orientation 10 out-of-plane deflection 43 radio interference regulations 3 out-of-plane distortion 43 read 11 Output characteristics 66 read command 11 read data 11 read error 13...
  • Page 89 Cheetah X15 Product Manual, Rev. C SCSI systems error consideration 35 SCSI systems error management 36 technical support services 71 SE 66 temperature 10 Seagate support service 37 ambient 27 sector 11 case 27 sector interleave 9 gradient 27 sector size 8...
  • Page 92 Seagate Technology, LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 83329484, Rev. C, Printed in USA...

This manual is also suitable for:

St318451lcSt39251lcCheetah x15 st318451lwCheetah x15 st318451lcCheetah x15 st39251lcCheetah x15

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