Service manual

System Tests 109
Table C–1 (Cont.) SCSI-B Error and Status Summary
Value Error
A Arbitration error:
AIP bit in initiator command register not set during arbitration process,
or arbitration lost during arbitration process, or arbitration not won.
B Target will not set BSY during selection process, or the SCSI-B is busy
at start of register test, or the INI_CMD<BSY>bit could not toggle
during the register test.
C Unable to loop data out onto SCSI-B bus and back in again.
D Direction and phase of SCSI-B bus, as set by the target and read from
the controller, are incompatible.
E SCSI-B bus will not drop REQ within timeout period, or SCSI-B bus will
not assert REQ within timeout period.
F DMAEND bit not verified in bus and status register, or DMA data not
matching expected data.
Table C–2 SCSI Device Status
Code Definition
0 Ready - SCSI device is on-line and ready for commands.
2 Off-line - Status given to SCSI ID devices that will not respond to
selection process, or status given to all devices for initialization.
4 Not ready - Status given to devices that are selectable, but return a not
ready status during status phase of a command (command tried five
times).
6 Diagnostic error - Device returned an error status after a self-test.
8 Key error - Unable to rewrite Customer Services key on removable
media sequential device.