Specifications

RA7x/SA7x Pocket Reference Guide 55
9A—Read and Off Track
Error Description: The heads were not fine-
positioned or locked on track (relative to the embedded
servo information) at the time a read operation was
ready to start. The drive took the necessary actions to
establish the on-track condition.
The drive will not post a recoverable read-and-off-track
error to prevent interruption to the controller. This
allows the controller to execute all of its available
retry/error recovery sequences to the drive and if
necessary, retrieve user data during a recoverable
error.
FN: 09—rdg&off.trk.—read gate and off track both
asserted
Most Probable Cause: HDA, ECM
9B—Write and Off Track
Error Description: While write gate was asserted, the
read/write heads moved off track.
FN: 58—wrg&off.trk.—write gate and off track both
asserted
Most Probable Cause: ECM, HDA
A0 Illegal Diagnostic Sequence
Error Description: The controller issued an SDI
DIAGNOSE command to the drive. The drive
determined that the requested diagnostics tests were
not in correct sequence or out of context with the
current state of the drive (for instance, seek test while
drive spun down). It also indicates that one of the
diagnose error commands was executed without the
error log being in the correct state. This could be an
operator error if special controller diagnostics were
manually invoked and the user inadvertently entered
incorrect parameters.
FN: D9—ill.dgn.seq—illegal diagnostic sequence
Most Probable Cause: Operator error, ECM, SDI
controller