5.43
VERIFY Command (2Fh)
The VERIFY command verifies the data on the medium for the Logical Block
Address range specified. The data format and field descriptions are shown in Table 5-
204 and Table 5-205 respectively.
Table 5-204
Bit
Byte
0
1
2 - 5
6
7 - 8
9
Field
DPO
BytChk
RelAdr
Logical
Block
Address
Verifica-
tion Length
VERIFY Command Descriptor Block-Data Format
7
6
5
Reserved
Table 5-205
VERIFY Command-Field Descriptions
Disable Page Out. When the value of the field = 1, the device server will assign the logical
blocks accessed by this command the lowest priority for being fetched into or retained by the
cache.
When DPO = 0, the priority will be determined by fields in the Caching page.
Byte Check. When the value is 1, the drive performs a byte-by-byte comparison of the data
on the medium with the data sent by the initiator in the data-out buffer transfer.
When 0, the drive performs a medium verification with no data comparison. In this case, no
data is sent by the initiator.
Relative Address. This feature is not supported; the field must be 0.
The address of the first logical sector to be verified.
The number of contiguous sectors that are to be verified. The drive returns a CHECK CON-
DITION status with the correct sense data if the specified transfer extends beyond out of the
logical sector space.
4
3
Operation Code (2Fh)
DPO
Reserved
Logical Block Address
Reserved
Verification Length
Control
Description
Maxtor Atlas 10K V
2
1
0
BytChk
RelAdr
5-147