44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0287 07/28/87
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AST-4000 LOW LEVEL FORMAT ROUTINE (CFMT)
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Recently, AST has been interchanging the Fixed Disks installed in
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the AST-4000 Disk Subsystems. Due to drive availability, some
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systems will have the FUJITSU Model M2243AS while others may have
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the MICROPOLIS Model 1325A.
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A few of the AST-4000 Disk Subsystems have been shipped without
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the FMT.DLS and the FMT.ATT files on the software distribution
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diskette. These files are necessary for the user to perform a
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"Low Level Format" (CFMT) on the fixed drive.
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In order for the user to create the correct FMT.ATT and FMT.DLS
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files, the unit must be opened to determine the type of drive
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installed. The Defect List should be attached to the top of the
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fixed disk.
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Creating the FMT.ATT File: (Reference Page C-3 User's Manual)
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FUJITSU MICROPOLIS
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MODEL MODEL
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2243AS 1325A
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Number of Cylinders 754 1024
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Number of Heads 11 8
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Write Pre-Comp 383 1025
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Landing Zone 0 0
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Step Pulse 2 2
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Interleave 2 2
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Note: The interleave factor of 1 to 1 can be changed for optimum
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operation on the PC AT by issuing the CFMT 1 command. (Reference
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Addendum to Appendix C, AST-4000 USER'S MANUAL, Addendum
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000195-008 A.)
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Using an interleave factor of 1 to 1 will reduce the total disk
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volume size by approximately four percent.
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