Fujitsu MAN3735 Manuale Utente
C141-E124-01EN
3 - 80
3.2.6
VERIFY (2F)
Bit
Byte
Byte
7
6
5
4
3
2
1
0
0
X‘2F’
1
LUN
u
0
0
BytChk
0
2
Logical Block Address (MSB)
3
Logical Block Address
4
Logical Block Address
5
Logical Block Address (LSB)
6
0
0
0
0
0
0
0
0
7
Transfer Block Count (MSB)
8
Transfer Block Count (LSB)
9
0
0
0
0
0
0
Flag
Link
This command reads the number of continuous logical data blocks specified in the "Block count"
field with the logical data block on the disk media which is specified in the "Logical block
address" field in the CDB as the top, then executes a VERIFY check on those data.
field with the logical data block on the disk media which is specified in the "Logical block
address" field in the CDB as the top, then executes a VERIFY check on those data.
The "Block count" field in the CDB specifies the number of data blocks which is the object of the
VERIFY check. When zero is specified in the "Transfer block count," the command is terminated
normally without performing seek and pre-fetch.
VERIFY check. When zero is specified in the "Transfer block count," the command is terminated
normally without performing seek and pre-fetch.
Bit 4 of CDB byte 1 is disabled in the IDD and the specified value is disregarded.
If "1" is specified in bit 1 of CDB byte 1, the BytChk bit, the IDD performs a comparison check of
the data read from the disk media and the data transferred from the INIT. If the data do not match
during this mode, the command is terminated with a CHECK CONDITION status
(MISCOMPARE [=E] / Miscompare during verify operation [=1D-00]).
the data read from the disk media and the data transferred from the INIT. If the data do not match
during this mode, the command is terminated with a CHECK CONDITION status
(MISCOMPARE [=E] / Miscompare during verify operation [=1D-00]).
If "0" is specified in bit 1 of CDB byte 1, the BytChk bit, an ECC (data portion) normalcy check is
executed. Also, error recovery processing during execution of the verify check is according to the
mode specified by the MODE SELECT parameter (verify error recovery parameter). For example,
if data correction processing is not prohibited, even if a correctable data check is detected, it is
regarded as if the verify check succeeded.
executed. Also, error recovery processing during execution of the verify check is according to the
mode specified by the MODE SELECT parameter (verify error recovery parameter). For example,
if data correction processing is not prohibited, even if a correctable data check is detected, it is
regarded as if the verify check succeeded.