Fujitsu MHE2043AT, MHE2064AT, MHF2021AT, MHF2043AT

Interface

5-48 C141-E057-01EN

(20) WRITE LONG (X’32’ or X’33’)

This command operates similarly to the READ SECTOR(S) command except that

the device writes the data and the ECC bytes transferred from the host system to

the disk medium. The device does not generate ECC bytes by itself. The WRITE

LONG command supports only single sector operation.

The number of ECC bytes to be transferred is fixed to 4 bytes and can not be

changed by the SET FEATURES command.

This command is operated under the following conditions:

• The command is issued in a sequence of the READ LONG or WRITE LONG

(to the same address) command issuance. (WRITE LONG command can be

continuously issued after the READ LONG command.)

If above condition is not satisfied, the command operation is not guaranteed.

At command issuance (I/O registers setting contents)

1F7H

(CM)

0011001R

1F6H

(DH)

×L×DV

Head No. /LBA [MSB]

1F5H

(CH)

1F4H

(CL)

1F3H

(SN)

1F2H

(SC)

1F1H

(FR)

Cylinder No. [MSB] / LBA

Cylinder No. [LSB] / LBA

Sector No. / LBA [LSB]

R = 0 →with Retry

R = 1 →without Retry

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