Seek - HP C2488A Technical Reference Manual

Seek
The SEEK command requests the logical unit to seek to the specified logical block address.
The target accepts both the 6-byte and 10-byte (extended) command formats. Status will
be returned as GOOD when the seek is complete. This command will return a CHECK
CONDITION status with a Sense Key of HARDWARE ERROR if unable to complete. The
NOT READY Sense Key will be returned if the drive has not yet spun up.
Seek (6-Byte) Command Descriptor Block (COB)
Bit
Byte 7
I
6
I
5
I
4
I
3
I
2
I
1
00
Opcode = OBH
01 Logical Unit Nwnber
i
Logical Block Address (MSB)
02-03 Logical Block Address
(LSB=03)
04 Reserved
05
Control Byte
Seek (10-Byte) Command Descriptor Block (COB)
Bit
Byte
7
I
6
I
5
I
4
I
3
I
2
I
1
00 Opcode = 2BH
01 Logical Unit Number
I
Reserved
02-05 (MSB=02) Logical Block Address (LSB=05)
06-08 Reserved
09 Control Byte
Logical Block Address. This field specifies the logical block address for the seek.
A-50 SCSI Command Descriptions
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0
I
0
DRAFT
1/18/93 09:58