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6.7
SEEK
(0B H )
BIT
BYTE
07
06
05
04
03
02
01
00
------1------1------1------1------1------1------1------
00
0
0
0
0
1
0
1
1
01
Logical Unit Number
(MSB)
Logical Block Address
02
Loglcal Block Address
03
Logical Block Address
(LSB)
04
Reserved (0)
05
Reserved (0)
I
Flag
1
Link
Figure 6-13.
SEEK Command
This command causes the selected drive to seek to the specified
starting address. If a head seek is required, the ACB-5500 will
disconnect from the SCSI bus and reconnect upon seek completion.
The ACB-5500 returns completion status immediately after the seek
pulses are issued and head motion starts.
Any command received
for a unit with a seek in progress will immediately complete with
a command completion status of busy (bit 3 set).
The drive is moved to the expected
track position but no ID
field verification is attempted.
The ACB-5500 uses an implied seek on READ,
WRITE and SEARCH
commands eliminating the need for
SEEK commands before each
operation.
Valid Errors:
Error
No Seek Complete
Drive Not Ready
Select Failure
Bad Format
Illegal Block Address
Bad Argument
Invalid Logic Number
Initiator Detected Error
SCSI Bus Out Parity Error
Adapter Parity Check
500504-00
6-22
Error Code
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