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The controller displays one of the following messages when an
error occurs during a diagnostics procedure:

Address mark not found
Attachment failed to respond

Bad ECC on disk read
Bad sector flag detected

Controller has failed

Drive activity failed
ECC corrected data error
Requested sector not found
Reset failed

Seek operation failed

Write fault on selected drive

If you 

see one 

of 

these 

error messages, check the drive,

controller, cables, and power connectors. If you still get an error,

contact your dealer.

Floppy disk diagnostic tests may be destructive or non-

destructive. Destructive diagnostics destroy data on the diskette,
but non-destructive diagnostics do not. The following table lists

which tests are destructive and which are not.

Destructive tests

Format
Random R(ead)/W( rite)

Sequential R(ead)/W(rite)

Nondestructive tests

Drive speed
Drive change line