SeaTools Disc Diagnostic may display a variety of error codes depending on the interface and the test module that was running when the error or status occured. In some situations when the drive is offline running a Drive Self Test, the drive will give its own DST result code.

DiagATA and DiagSCSI Test Modules

DST Error Codes

00 No Error
01 DST was Aborted by User
02 DST was Interrupted by Reset or Power Off
03 DST Could Not be Run
04 DST Failed for Reasons Unknown
05 DST Failed Electrical Element (Read/Write Head Check)
06 DST Failed Servo Element (Track Following Check)
07 DST Failed Read Element (A Bad Sector was Found)

* "Defective drive" and "Corrupted format" errors (sometimes called 03/31 errors) can often be repaired with a data-destructive zero fill data pattern or a low level format. Current disc drives contain thousands of spare sectors which are automatically reallocated if the drive senses difficulty reading or writing. Since SeaTools is read-only (data safe), occasionally a problem sector that has not reallocated to a spare sector can be forced to do so by writing to that sector. Spare sector reallocation is a normal intelligent drive operation.