Seagate Ultra 320 - Manual (Page 152)

138 Parallel SCSI Interface Product Manual, Rev. A
7.3 Status
A Status byte shall be sent from the target to the initiator during the STATUS phase at the termination of each
command as specified in Tables 63 and 64 unless the command is cleared by one of the following conditions:
1. an Abort message
2. a Bus Device Reset message
3. a hard reset condition
4. an unexpected Bus Free condition (see Section 3.1.1)
5. an ABORT TASK message
6. a CLEAR TASK SET message
Table 64: Status byte code bit values
[1] What was formerly called a “Command Queue” is now called a “Task Set.”
[2] Formerly “Command Terminated.”
A description of the status byte codes is given below.
Good. This status indicates that the Device Server has successfully completed the task.
Check Condition. This status indicates that an auto contingent allegiance or contingent allegiance condition
has occurred (see Section 7.6.1). Optionally, autosense data may be delivered (see Section 7.6.4.2).
Condition Met. This status shall be returned whenever the requested operation specified by an unlinked
command is satisfied (see the PREFETCH commands in ANSI SCSI Block Commands-2, T10/1417D).
Table 63: Status byte
Bit
Byte
7 6 5 4 3 2 1 0
0 Reserved STATUS BYTE CODE Reserved
Status byte Status represented Task Ended
00h Good Yes
02h Check Condition Yes
04h Condition Met/Good Yes
08h Busy Yes
10h Intermediate/Good No
14h Intermediate/Condition Met No
18h Reservation Conflict Yes
22h Obsolete [2] Yes
28h Queue Full/Task Set Full [1] Yes
30h ACA Active Yes
40h Task Aborted Yes
All other codes Reserved