Fujitsu MHA2021AT Product Manual page 105

Interface
command is used for checking ECC function by combining with the WRITE
LONG command.
Number of ECC bytes to be transferred is fixed to 4 bytes and cannot be changed
by the SET FEATURES command.
The READ LONG command supports only single sector operation.
1F7
1F6
1F5
1F4
1F3
1F2
1F1
R = 0
R = 1
1F7
1F6
1F5
1F4
1F3
1F2
1F1
*1 If the command is terminated due to an error, this register indicates 01.
(18) 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.
5-44
At command issuance (I/O registers setting contents)
(CM) 0 0
H
(DH) L
H
(CH) Cylinder No. [MSB] / LBA
H
(CL) Cylinder No. [LSB] / LBA
H
(SN) Sector No. / LBA [LSB]
H
(SC) 01
H
(FR) xx
H
with Retry
without Retry
At command completion (I/O registers contents to be read)
(ST) Status information
H
(DH) L
H
(CH) Cylinder No. [MSB] / LBA
H
(CL) Cylinder No. [LSB] / LBA
H
(SN) Sector No. / LBA [LSB]
H
(SC) 00 (*1)
H
(ER) Error information
H
1 0 0 0
DV Head No. /LBA [MSB]
DV Head No. /LBA [MSB]
1 R
C141-E042-01EN