Fujitsu MHT2020AT Product Manual page 131

(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. The READ LONG command supports only single sector
operation.
Number of ECC bytes to be transferred is fixed to 4 bytes and cannot be changed
by the SET FEATURES command.
At command issuance (I/O registers setting contents)
1F7 (CM)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (FR)
H
(R: Retry)
At command completion (I/O registers contents to be read)
1F7 (ST)
H
1F6 (DH)
H
1F5 (CH)
H
1F4 (CL)
H
1F3 (SN)
H
1F2 (SC)
H
1F1 (ER)
H
C141-E192-01EN
0 0 1 0
x L x DV
Cylinder No. [MSB] / LBA
Cylinder No. [LSB] / LBA
Sector No. / LBA [LSB]
01
xx
Status information
x L x DV
Cylinder No. [MSB] / LBA
Cylinder No. [LSB] / LBA
Sector No. / LBA [LSB]
xx
Error information
5.3 Host Commands
0 0 1 R
Head No. /LBA [MSB]
Head No. /LBA [MSB]
5-57