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7K200 SATA OEM Specification

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14.11 Initialize Device Parameters (91h)

Command Block Output Registers

Command Block Input Registers

7 6 5 4 3 2 1 0 Register

7 6 5 4 3 2 1 0

Data

- - - - -

- Data

- - - - - -

Feature

- - - - -

- Error

...See

Below...

Sector Count

V V V V V V V V Sector Count

- - - - - -

LBA

Low

- - - - -

- LBA

Low

- - - - - -

LBA

Mid

- - - - -

- LBA

Mid

- - - - - -

LBA

High

- - - - -

- LBA

High

- - - - - -

Device

- - - - H H H H Device

- - - - - -

Command

1 0 0 1 0 0 0 1 Status

...See

Below...

Error Register

Status Register

7 6 5 4 3 2 1 0

CRC UNC 0

IDN

0 ABT T0N

BSY RDY

DF DSC DRQ

COR IDX

ERR

0 0 0 0 0 V 0 0

0 0 0 - - 0 0 V

Table 66 Initialize Device Parameters Command (91h)

The Initialize Device Parameters command enables the host to set the number of sectors per track

and the number of heads minus 1, per cylinder. Words 54-58 in Identify Device Information reflects

these parameters.

The parameters remain in effect until the following events:

Another Initialize Device Parameters command is received.

The device is powered off.

Soft reset occurs and the Set Feature option of CCh is set

Output Parameters To The Device
Sector Count

The number of sectors per track. 0 does not mean there are 256 sectors per track, but there is no
sector per track.

The number of heads minus 1 per cylinder. The minimum is 0 and the maximum is 15.