Fujitsu MHJ2181AT Product Manual page 122

(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:
READ LONG issued
(After READ LONG is issued, WRITE LONG can be issued consecutively.)
If above condition is not satisfied, the command operation is not guaranteed.
1F7
1F6
1F5
1F4
1F3
1F2
1F1
1F7
1F6
1F5
1F4
1F3
1F2
1F1
*1 If the command is terminated due to an error, this register indicates 01.
(21) READ BUFFER (X'E4')
The host system can read the current contents of the sector buffer of the device by
issuing this command. Upon receipt of this command, the device sets the BSY bit
of Status register and sets up the sector buffer for a read operation. Then the
C141-E088-03EN
WRITE LONG (Same address) issues sequence
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
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 1 0 0
DV Head No. /LBA [MSB]
DV Head No. /LBA [MSB]
5.3 Host Commands
1 R
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