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12.31 Read Verify Sector(s) (40h/41h)
The Read Verify Sector(s) verifies one or more sectors on the device. No data is transferred to the host.
The difference between Read Sector(s) command and Read Verify Sector(s) command is whether the data is
transferred to the host or not.
If an uncorrectable error occurs, the read verify will be terminated at the failing sector
Table 177 Read Verify Sector(s) Command (40h/41h)
Command Input
Field
Description
FEATURE
N/A
COUNT
The number of logical sectors to be verified. A value of 00h
indicates that 256 logical sectors are to be verified
LBA
LBA of first logical sector to be verified
DEVICE
Bit Description
7:5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 40h
Normal Outputs
See Normal Outputs in Section 12.7 Flush Cache (E7h)
Error Outputs
See Error Outputs in Section 12.18 Read DMA (C8h/C9h)
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Hard Disk Drive Specification