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SCSI Description
Maxtor Atlas 10K III 5-169
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-
210 and Table 5-211 respectively.
VERIFY Command Descriptor Block-Data Format
VERIFY Command-Field Descriptions
0 Operation Code (2Fh)
1 Reserved DPO Reserved BytChk RelAdr
2 - 5 Logical Block Address
6 Reserved
7 - 8 Verification Length
9 Control
DPO
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.
BytChk
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 buff-
er transfer.
When 0, the drive performs a medium verification with no data comparison. In
this case, no data is sent by the initiator.
RelAdr Relative Address. This feature is not supported;
Logical
Block
Address
The address of the first logical sector to be verified.
Verifica-
tion
Length
The number of contiguous sectors that are to be verified. The drive returns a
CHECK CONDITION status with the correct sense data if the specified transfer
extends beyond out of the logical sector space.