#68 Article 6820 Posted at 1995/04/09 19:46:11 by おぐ (MAP4973) [HDD]
Subject: Re: MXT-540Sの回転数 /6762
ftp.maxtor.com にあったのでもってきました。
ここから--------------------------------------
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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 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): ................... 300 **
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 窺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 .............................. 5庵 to 55庵
Non-operating .......................... -40庵 to 65庵
Thermal gradient ....................... 20庵 per hour max
Humidity
Operating .............................. 5% to 95% non-condensing
Non-operating .......................... 5% to 90% non-condensing
Maximum gradient/hr .................... 20%
Maximum wet bulb ....................... 27.6庵
Reliability and Maintenance:
MTBF ....................................... >300,000 hours
Preventative Maintenance ................... None
MTTR ....................................... 30 minutes
Component design life ...................... >5 years
Recoverable error rate ..................... 10 in 10 to the 13th ***
Unrecoverable error rate ................... 10 in 10 to the 17th ***
Seek error rate ............................ 10 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 欝%, .54A (typical) 1.5A (maximum)
+5 VDC 欝%, .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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