User's Manual

Interface

(8) INITIALIZE DEVICE PARAMETERS (X '91')

The host system can set the number of sectors per track and the maximum head

number (maximum head number is "number of heads minus 1") per cylinder with

this command. Upon receipt of this command, the device sets the parameters.

Then the device reports the status to the host system.

When the SC field is specified to X '00', an ABORTED COMMAND error is

posted. Other than X '00' is specified, this command terminates normally.

The parameters set by this command are retained even after soft reset and

COMRESET issuance or power save operation regardless of the setting of

disabling the reverting to default setting.

The operation is always performed in CHS mode, with the command ignoring any

setting of LBA mode.

• Error reporting conditions

(1) "00h" is specified in the SC field (ST = 51h, ER = 04h).

(2) A SATA communication error occurred (ST = 51h, ER = 14h).

At command issuance (Shadow Block Registers setting contents)

CM 1 0 0 1 0 0 0 1

DH x x x x Max. head No.

Number of sectors/track

At command completion (Shadow Block Registers contents to be read)

ST Status information

DH x x x x Max. head No.

Number of sectors/track

Error information

5-42 C141-E261