HP C2488A User Manual

Status Byte
A status byte is sent from the Target to the Initiator during the Status phase at the
termination of each command as specified, unless the command is cleared by an
Abort
message, by a Bus Device Reset message, or by a "hard" Reset condition. The status byte
format, code values, and code descriptions are shown below.
Byte
7
I
6
00
Reserved
Value
Status
S 4
3
2 1
0
0
0 0 0
Good
0
0
0 0 1 Check Condition
0 0 1 0 0 Busy
0 1 0 0
0
Intennediate
0 1 1 0
0
Reservation Conflict
1
0
1 0 0 Queue Full
4·6 SCSI Interface
Status
Byte Format
Bit
S
I
4
I
3
I
2
I
1 0
Status Byte Code
Reserved
Status Byte Code Descriptions
Description
Indicates that Target has successfully completed the conunand.
Caused by any error, exception, or abnonnal condition that causes sense data
to be set. The REQUEST SENSE conunand should be issued following a
Check Condition status to determine the nature of the condition.
The Target is busy. This status is retum.ed whenever a Target is unable to
accept a command from an Initiator. The nonnallnitiator recovery action is
to issue the conunand again at a later time.
This status is retum.ed for every conunand in a series of linked commands
(except the last GOOD conunand), unless an error, exception, or abnonnal
condition causes a Check Condition status to be set. IT this status is not
retum.ed, the chain of linked conunands is broken; no further commands in
the series will be requested.
This status is retum.ed whenever a SCSI device attempts to access a logical
unit that is reserved to another SCSI device.
This status is retum.ed when a Simple Queue Tag, Ordered Queue Tag, or
Head oj Queue Tag message is received and the command queue is full. The
I/O process is not placed in the conunand queue.
DRAFT
1/18/93 09:58

HP C2488A Specifications

General

Brand	HP
Model	C2488A
Category	Storage
Language	English