Fujitsu MHA2021AT Product Manual page 85

Interface
The data stored in the buffer, and CRC code and ECC bytes are written to the data
field of the corresponding sector(s). Upon the completion of the command
execution, the command block registers contain the cylinder, head, and sector
addresses of the last sector written.
If an error occurs during multiple sector write operation, the write operation is
terminated at the sector where the error occured. Command block registers
contain the cylinder, the head, the sector addresses (in the CHS mode) or the
logical block address (in the LBA mode) of the sector where the error occurred.
Then the host can read the command block registers to determine what error has
occurred and on which sector the error has occurred.
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, the remaining number of
sectors of which data was not transferred is set in this register.
5-24
At command issuance (I/O registers setting contents)
(CM) 0 0
H
(DH) L
H
(CH) Start cylinder No. [MSB] / LBA
H
(CL) Start cylinder No. [LSB] / LBA
H
(SN) Start sector No. / LBA [LSB]
H
(SC) Transfer sector count
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) End cylinder No. [MSB] / LBA
H
(CL) End cylinder No. [LSB] / LBA
H
(SN) End sector No. / LBA [LSB]
H
(SC) 00 (*1)
H
(ER) Error information
H
1 1 0 0
DV Start head No. /LBA
[MSB]
DV End head No. /LBA
[MSB]
0 R
C141-E042-01EN