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IDENTIFY DRIVE

The WD1004-27X and WD1004A-27X boards work with any hard disk drive that
has the ST506/412 drive interface and no more than 1024 cylinders and 16 heads.
The Seagate 238 hard disk drive unit is such a drive.

Look in your drive manual to verify that you have an ST506/412 RLL drive or
check with your dealer.

Then check the drive manual for the drive parameters, such as those listed in Table
1-1. You'll need this information to select the proper low level format.

Table 1-1. WD1004 and WD1004A Default Drive Parameters
Formatted
Capacity

Number of
Heads

Number of
Cylinders

Sectors per
Track

32MB

4

615

26

This board does not work with RLL drives. If you have an MFM drive you
need either the WDXT–GEN2 or WD1004A–WX1 board.

1-2

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