Filter
Top Products
4.3 SCSI Commands
C156-E224-01EN 4-33
4.3.13 VERIFY command
Table 4.52 VERIFY command
Bit
Byte
76543210
0 Operation Code (2Fh)
1LUN Reserved
ByteChk
Reserved
2-5 Logical Block Address
6Reserved
7-8 Verification Length
9Reserved
The VERIFY command verifies the specified number of blocks beginning at the
specified logical block address. Logical Block Address specifies the logical block
address at which the command should start verifying data. Verification Length
specifies the number of blocks to be verified. If Verification Length is 0, the
command ends normally without verifying any data.
The ByteChk bit controls data compare processing. However, since the ODD does
not support ByteChk, this bit must be set to 0. If 1 is specified, the command ends
with Check Condition.
4.3.14 WRITE (6) command
The WRITE (6) command writes the specified number of blocks of data sent from
INIT beginning at the specified logical block address on the media.
Table 4.53 CDB of WRITE (10) command
Bit
Byte
76543210
0 Operation Code (0Ah)
1LUN(MSB)
2
3
Logical Block Length
(LSB)
4 Transfer Length
5Reserved
Logical Block Address specifies the logical block address at which the command
should start writing data. Transfer Length specifies the number of consecutive
logical blocks of data to be transferred. If Transfer Length is 00h, the command
assumes that 100h is specified. If the value is other than 00h, the command
assumes it to be the number of logical blocks to be transferred.
• If the alternate blocks become insufficient during alternate block assignment,
the CHECK CONDITION status is reported. The cause is indicated in the
sense byte (Sense Key = MEDIUM ERROR [= 3]).