Interface

(5) READ VERIFY SECTOR(S) (X’40’ or X’41’)

This command operates similarly to the READ SECTOR(S) command except that the data is not transferred to the host system.

After all requested sectors are verified, the device clears the BSY bit of the Status register and generates an interrupt. Upon the completion of the command execution, the command block registers contain the cylinder, head, and sector number of the last sector verified.

If an unrecoverable error occurs, the verify operation is terminated at the sector where the error occurred. The command block registers contain the cylinder, the head, and the sector addresses (in the CHS mode) or the logical block address (in the LBA mode) of the sector where the error occurred. The Sector Count register indicates the number of sectors that have not been verified.

At command issuance (I/O registers setting contents)

1F7H(CM)

0

1

0

0

0

0

0

R

 

 

 

 

 

 

1F6H(DH)

x

L

x

DV

Start head No. / LBA [MSB]

1F5H(CH)

Start cylinder No. [MSB] / LBA

 

 

 

1F4H(CL)

Start cylinder No. [LSB] / LBA

 

 

 

1F3H(SN)

Start sector No. / LBA [LSB]

 

 

 

1F2H(SC)

Transfer sector count

 

 

 

 

1F1H(FR)

xx

 

 

 

 

 

 

 

At command completion (I/O registers contents to be read)

1F7H(ST)

Status information

 

 

 

 

 

 

 

 

 

1F6H(DH)

x

 

L

x

DV

End head No. / LBA [MSB]

1F5H(CH)

End cylinder No. [MSB] / LBA

1F4H(CL)

End cylinder No. [LSB] / LBA

1F3H(SN)

End sector No. / LBA [LSB]

1F2H(SC)

00 (*1)

 

 

 

 

1F1H(ER)

Error information

 

 

 

 

 

 

 

 

 

*1 If the command is terminated due to an error, the remaining number of sectors of which data was not transferred is set in this register.

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Fujitsu MHV2080AS, MHV2060AS, MHV2040AS manual Read Verify Sectors X’40’ or X’41’

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