Write Same (41) - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

7.40 WRITE SAME (41)

Byte
7 6
0
1 LUN
2 (MSB)
3
4
5
6
7 (MSB)
8
9 VU = 0
Figure 123. WRITE SAME (41)
The Write Same command instructs the Target to write a single block of data, transferred to the Target from
the Initiator, to a number of sequential logical blocks. This command is useful to write large data areas
without sending all of the data over the SCSI bus.
Logical Block Address specifies the address at which the write begins. The Number of Blocks specifies
the number of contiguous blocks to be written. If the number is 0, all of the remaining blocks on the
specified Logical Unit are written.
RelAdr (Relative Block Address) is not supported and must be set to be ZERO.
The data for this command is not retained in the cache.
160
O E M Spec. of DDRS-3xxxx
Bit
5 4 3
Command Code = 41h
Reserved = 0
Logical Block Address
Reserved = 0
Number of Blocks
Reserved = 0
2 1 0
RelAdr
= 0
(LSB)
(LSB)
FLAG LINK