Command Specifications
218 C141-C013
4.2.4 WRITE EXTENDED (2A) Bit
Byte 7 6 5 4 3 2 1 0
0 X'2A'
1 0 0 0 × FUA 0 0 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 0 0
This command transfers the number of blocks of data specified in the "Transfer
block count" field from the INIT and writes them in continuous logical data
blocks with the logical data block on the disk media specified in the "Logical
block address" field in the CDB as the top.
The functions of this command are the same as those of the Group 0 WRITE
command (Section 4.2.3) with the exception that it is possible to specify 4-byte
logical block addresses and 2-byte transfer block counts. However, when zero is
specified for the "Transfer block count," the command is terminated normally
without pre-fetch being performed.
In this device, specifications to the "FUA" bit in CDB byte 1 are invalid and
operation is as if zero is specified.
The specification of bit 4 of CDB byte 1 is invalid and the specified value is
disregarded.