Read Verify [40H, 41H]; Recalibrate [1Xh]; Seek [7Xh]; Set Features [Efh] - Hitachi DK23DA-30F - 30 GB Hard Drive Specifications

6.3.2.5.2 Read Verify [40h, 41h]

This command is same as the Read Sectors command, except that DRQ is never set and no data is
transferred to the host. When the requested sectors have been verified, the device clears BSY and
generates an interrupt. Upon command completion, the Command Block Registers contain the cylinder,
head, and sector numbers of the last sector verified. If an error occurs, the verify terminates at the sector
where the error occurs. The Command Block Registers contain the cylinder, head, and sector numbers of
the sector where the error occurred. The Sector Count Register shall contain the number of sectors not yet
verified.

6.3.2.5.3 Recalibrate [1Xh]

This command performs a physical seek to track 0. Upon receipt of the command, the device sets BSY and
issues a seek to cylinder 0. The device then waits for the seek to complete before updating status, clearing
BSY, and generating an interrupt. If the device cannot reach cylinder 0, a Track Not Found error is posted.

6.3.2.5.4 Seek [7Xh]

This command indicates a logical seek to the track and head specified in the Command Block Registers.
The device will set DSC=1 after the seek has Completed. If another command is issued to the device while
a seek is being executed, the device sets BSY=1, waits for the seek to complete, and then begins execution
of the command.

6.3.2.5.5 Set Features [EFh]

This command is used to specify the parameters shown in Tables 6.7 and 6.8.
Code *1
03h
05h
09h
33h
44h
55h
66h
77h
85h
88h
89h
99h
AAh
BBh
CCh
02h
82h
*1: If the code is not supported, the device returns Aborted Command Error.
*2: See Table 6.8.
*3: See Sec. 6.3.2.6.2 Advanced Power Management for the details.
*4: See Sec. 6.3.10.2 Address Offset Feature for the details.
K6602705
Rev.3
08.20.01
Table 6.7 Set Feature Register Definition
Set transfer mode based on value in Sector Count register *2
Enable Advanced Power management *3
Enable Address Offset Mode *4
Disable retries
Enable Vendor Unique ECC Byte Length(24 bytes) transfer
Disable read look-ahead feature
Disable reverting to power on defaults
Disable ECC
Disable Advanced Power management *3
Enable ECC
Disable Address Offset Mode *4
Enable retries
Enable read look-ahead feature
Enable 4 bytes ECC transfer
Enable reverting to power on defaults
Enable write cache
Disable write cache
Description
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Default
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