Table of Contents
Advertisement
12.63
Write and Verify (16) command
The Write and Verify (16) command requests that the target write the data transferred from the initiator to the
medium and then verify that the data is correctly written. The data is only transferred once from the initiator to
the drive.
Table 226: Write and Verify (16) command (8Eh)
Bit
Byte
0
1
Logical Block Address (MSB)
2
Logical Block Address
3
Logical Block Address
4
Logical Block Address
5
Logical Block Address
6
Logical Block Address
7
Logical Block Address
8
Logical Block Address (LSB)
9
Transfer Length (MSB)
10
Transfer Length
11
Transfer Length
12
Transfer Length (LSB)
13
Reserved
14
Control
15
Field definitions (listed alphabetically)
Table
number
BytChk (Byte Check)
226
0
Verification will be a medium verification (ECC) with no data comparison.
1
A byte-by-byte compare of data written on the peripheral device and the data transferred from the initiator. If the
compare is unsuccessful, the command terminates with a Check Condition status and the sense key is set to Mis-
compare.
Control
226
See Control Bytes in Section 11.2.1.6.
DPO (Disable Page Out)
226
The DPO bit is used to control replacement of logical blocks in the cache memory when the host has information on the
future usage of the logical blocks.
1
The target assigns the logical blocks accessed by this command the lowest priority for being fetched into or retained
by the cache. The logical blocks accessed by the command are not likely to be accessed again in the near future
and should not be put in the cache memory nor retained by the cache memory.
0
The logical blocks accessed by this command are likely to be accessed again in the near future.
Logical Block Address
226
The logical block at which the write operation begins if RelAdr bit is zero (see RelAdr bit definition).
Fibre Channel Interface Manual, Rev. D
7
6
1
0
0
0
Reserved
8Eh
5
4
0
0
0
0
DPO
3
2
1
1
0
0
BytChk
1
0
1
0
RelAdr
333
Advertisement
Table of Contents
