IBM IC35L036UWDY10 Hard Drive Specifications - Page 181

VERIFY 2Fh, Reserved = 0, VU = 0, Transfer Length, Logical Block Address, Rsvd = 0

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8.39 VERIFY (2Fh) Byte 0 1 2 3 4 5 6 7 8 9 Bit 7 6 5 4 3 2 Command Code = 2Fh Reserved = 0 DO Rsvd = 0 (MSB) Logical Block Address 1 0 Byte RSVD= Chk 0 (LSB) Reserved = 0 (MSB) Transfer Length (LSB) VU = 0 Reserved = 0 FLAG LINK Figure 168. VERIFY The VERIFY command requests that the drive verify the data written on the media. A verification length of zero indicates that no data will be transferred. This condition is not considered an error. ! ByteChk bit set to zero indicates that the data is read from the disk and verified using ECC. If an ECC error is detected in the verify process, CHECK CONDITION status is returned with sense key set to MEDIUM ERROR. ByteChk bit set to one indicates that byte-by-byte comparison is performed between the data on the disk and data transferred from the initiator during the data-out phase. If the comparison is unsuccessful, the command is terminated with CHECK CONDITION status and the sense key is set to MISCOMPARE. ! DO (Disable Page Out) bit of one indicates that the data accessed by this command is to be assigned the lowest priority for being written into or retained by the cache. A DO bit of one overrides any retention priority specified in the MODE SELECT Page 8 Caching Parameters. A DO bit of zero indicates that the priority is determined by the retention priority. The initiator should set the DO bit when the blocks read by this command are not likely to be read again in the near future. Ultrastar 146Z10 hard disk drive specifications 165

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8.39 VERIFY (2Fh)
LINK
FLAG
Reserved = 0
VU = 0
9
(MSB)
Transfer Length
(LSB)
7
8
Reserved = 0
6
(MSB)
Logical Block Address
(LSB)
2
3
4
5
RSVD=
0
Byte
Chk
Rsvd = 0
DO
Reserved = 0
1
Command Code = 2Fh
0
0
1
2
3
4
5
6
7
Bit
Byte
Figure 168. VERIFY
The VERIFY command requests that the drive verify the data written on the media. A verification length
of zero indicates that no data will be transferred. This condition is not considered an error.
!
ByteChk
bit set to zero indicates that the data is read from the disk and verified using ECC. If an ECC
error is detected in the verify process, CHECK CONDITION status is returned with sense key set to
MEDIUM ERROR. ByteChk bit set to one indicates that byte-by-byte comparison is performed be-
tween the data on the disk and data transferred from the initiator during the data-out phase.
If the comparison is unsuccessful, the command is terminated with CHECK CONDITION status and
the sense key is set to MISCOMPARE.
!
DO
(Disable Page Out) bit of one indicates that the data accessed by this command is to be assigned
the lowest priority for being written into or retained by the cache. A DO bit of one overrides any reten-
tion priority specified in the MODE SELECT Page 8 Caching Parameters. A DO bit of zero indicates
that the priority is determined by the retention priority. The initiator should set the DO bit when the
blocks read by this command are not likely to be read again in the near future.
Ultrastar 146Z10 hard disk drive specifications
165