Read (Group 1) Command (28H) - HP 2600fx - Optical Disk Drive Command Reference Manual

NOTE
Table 2-75
NOTE
SCSI-2 Drive Command Set

Read (Group 1) Command (28H)

Read (Group 1) Command (28H)
This command reads data from the specified logical block address.
The Mode Select Commands (15H, 55H) impact read, write, format, and
erase commands.
Read (Group 1) Command CDB
Byte 7 6
0
1 Logical Unit Number
(0)
2
3
4
5
6
7
8
9 PBA
DPO A Disable Page Out bit of 1 instructs the target not to
store readahead data in cache after the read data has
been transferred to the initiator.
A DPO bit of 0 instructs the target it may store
readahead data in the cache after the read data has
been transferred to the initiator.
The DPO bit is ignored in 9.1 and 5.2 Gbyte capacity drives.
2-82
5 4
Operation Code (28H)
DPO
Starting Logical Block Address (MSByte)
Starting Logical Block Address
Starting Logical Block Address
Starting Logical Block Address (LSByte)
Reserved (0)
Transfer Length (MSByte)
Transfer Length (LSByte)
Reserved (0)
3 2 1
FUA Reserved (0)
Flag
0
RelAdr
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Chapter 2