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                      MAXTOR MXT-540SL DISK DRIVE (SCSI)
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KEY FEATURES:

  * 8.5 ms avg read seek                      * 8-point shock mounting system
  * 9.0 ms avg write seek                     * No sway space required
  * SCSI command overhead of ó 300usec        * Self-test diagnostics
  * Synchronous SCSI-2 fast transfer rates    * Mechanically and thermally
    to 10Mbytes/sec, with 15 byte offset        isolated head-disk environment
  * Disk transfer rate to 40 Mbits/sec,       * Allows various sector sizes
    buffer to disk                            * Firmware downloadable via SCSI
  * Advanced buffer implementation              interface
    - 256 KB mulit-segmented read ahead       * 16-bit/35-Mhz processor
    - Write stacking capability               * Hard sectored zoned density
    - Tagged command queuing                    recording
  * SCSI-2 compliance                         * 8-zone recording format
  * 88-bit ECC for high data reliability      * 1,7 RLL data encoding for
    with on the fly correction capability       improved windows margins
  * Power-down braking with positive head     * Brushless in-hub spindle motor
    parking and latching                      * Sealed HDA
  * Surface mounted components with high
    degree of integration for high reliability


SPECIFICATIONS:

Formatted: ................................. 540 Million bytes
Embedded Controller: ....................... SCSI
Spare capacity (Mbytes) .................... 6.2
Number of Disks: ........................... 4
Data Surfaces: ............................. 8
Data Heads: ................................ 7
Servo Heads: ............................... 1
Physical tracks: ........................... 16,968
Bytes per Block: ........................... 512
Sectors per track: ......................... 46-78
Physical cylinders: ........................ 2,616

PERFORMANCE (Typical):

Seek times* (ms), typical
     Track to track: ....................... <1.5
     Read: ................................. 8.5
     Write: ................................ 9.0
     Maximum: .............................. 20

Command overhead (usec): ................... ó300 **

SCSI-bus transfer rate (Mbytes/sec)
     Asynchronous: ......................... Up to 5.0
     Synchronous: .......................... Up to 10.0

Disk transfer rate (Mbits/sec) ............. 23-40

Average latency (ms) ....................... 4.76
Rotation speed ............................. 6,300RPM ñ.5%

Interleave: ................................ 1:1

PHYSICAL

    Height:  1.0 in. (2.54 cm)
    Width:   4.00 in. (101.6 mm)
    Depth:   5.750 in. (146 mm)
    Weight:  1.2 lbs. (.57 kg)

Environmental:

Temperature
    Operating .............................. 5øC to 55øC
    Non-operating .......................... -40øC to 65øC
    Thermal gradient ....................... 20øC per hour max

Humidity
    Operating .............................. 5% to 95% non-condensing
    Non-operating .......................... 5% to 90% non-condensing
    Maximum gradient/hr .................... 20%
    Maximum wet bulb ....................... 27.6øC

Reliability and Maintenance:

MTBF ....................................... >300,000 hours
Preventative Maintenance ................... None
MTTR ....................................... 30 minutes
Component design life ...................... >5 years
Recoverable error rate ..................... ó10 in 10 to the 13th ***
Unrecoverable error rate ................... ó10 in 10 to the 17th ***
Seek error rate ............................ ó10 in 10 to the 7th

Shock & Vibration (typical)
    Operating shock ........................ 3 Gs (no errors)
    Non-operating shock .................... 70 Gs
    Operating (recoverable errors) ......... 10

Power dissipation (typical) ................ 9 Watts
Audible noise @ 1 foot ..................... 40 dBA

Power requirements

+12 VDC ñ5%, .54A (typical) 1.5A (maximum)
+5 VDC ñ5%, .50A (typical)

SCSI-BUS COMMAND SET

Format Unit                       Reserve
Inquiry                           Rezero Unit
Mode Select                       Seek
Mode Sense                        Seek (Extended)
Read                              Send/Receive Diagnostics
Read Capacity                     Start/Stop Unit
Read Data Buffer                  Test Unit Ready
Read Defect Data                  Verify
Read (Extended)                   Write
Read Long                         Write and Verify
Reassign Block                    Write Data Buffer
Release                           Write (Extended)
Request Sense                     Write Long

     *   Includes settling
     **  Includes arbitration, message transfer, command transfer, command
         interpretation, status interpretation, and the posting of status.
     *** With default errors recovery parameters


                MXT is a trademark of Maxtor Corporation.
             Specifications subject to change without notice.

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MFG

OS

ABC-Hotline
Billstr. 236
20539 Hamburg
per Fax