Fujitsu MHJ2181AT Product Manual page 121

Interface
(19) READ LONG (X'22' or X'23')
This command operates similarly to the READ SECTOR(S) command except that
the device transfers the data in the requested sector and the ECC bytes to the host
system. The ECC error correction is not performed for this command. This
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: Retry)
1F7
1F6
1F5
1F4
1F3
1F2
1F1
*1 If the command is terminated due to an error, this register indicates 01.
5-48
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 0 0 0
DV Head No. /LBA [MSB]
DV Head No. /LBA [MSB]
1 R
C141-E088-03EN