Toshiba T4400SXC Maintenance Manual page 52

Subtest 01 Sequential Read
This subtest performs a Cyclic Redundancy Check (CRC), that continuously
reads all the tracks on a floppy disk. The following tracks are read according to
the media type in the floppy disk drive:
Double-sided, double-density (2D): Track 0 to 39.
Double-sided, double-density, double-track (2DD) and Double-sided, high-
density, double-track (2HD): Track 0 to 79.
The start track is specified when the FDD test is started. Refer to step 4 at the
beginning of this section to set the start track.
Subtest 02 Sequential ReadIWrite
This subtest continuously writes data pattern B5ADADh to all the specified
tracks selected in subtest 1. The data is then read and compared to the original
data.
Subtest 03 Random Address/Data
This subtest writes random data to random addresses on all tracks defined in
subtest 01. The data is then read and compared to the original data.
Subtest 04 Write Specified Address
This subtest writes specified data to a specified track, head, and address.
Subtest 05 Read Specified Address
This subtest reads data from a specified track, head, and address.
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