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- 4.5
COMPLETION STATUS BYTE
Status is always sent at the end of a command or set of linked
commands.
Intermediate status is sent at the completion of a
linked command.
Any abnormal condition encountered during com-
mand execution causes command termination and ending status.
BIT
BYTE
07
06
05
04
------!~~~~~;l------ ~~~fi~
------1------1------ ------
03
02
Busy
Equal
Figure 4-5.
Completion Status Byte
Bits 0, 5, 6
&
7:
Zero for ACB-5500.
01
00
Check Reserv
Bit 1: Check condition.
Sense is available.
See REQUEST SENSE
command, section 6.3.
Bit 2:
Condition met.
Set when any SEARCH is satisfied.
Bit 3: Busy.
Device is busy or reserved.
Busy status will be
sent whenever the ACB-5500 is unable to accept a command from a
Host.
This condition occurs when a Host
that does not allow
reconnection
requests
an operation from
a
reserved or busy
device.
It also occurs if a dual port device is reserved to the
other controller.
Bit 4:
Reservation Conflict.
When set with bit 3, indicates
drive access or reservation request in conflict with an existing
reservation.
500504-00
4-21
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