IBM IC35L036UWDY10 Hard Drive Specifications - Page 190

WRITE SAME 41h, Reserved = 0, VU = 0, Number of Blocks, Logical Block Address, RelAdr

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8.45 WRITE SAME (41h) Byte 0 1 Bit 7 6 5 4 3 2 Command Code = 41h Reserved = 0 Reserved = 0 1 0 RelAdr =0 2 (MSB) 3 4 5 Logical Block Address (LSB) 6 Reserved = 0 7 (MSB) 8 Number of Blocks 9 VU = 0 Reserved = 0 (LSB) FLAG LINK Figure 175. WRITE SAME (41) The Write Same command instructs the drive to write a single block of data transferred to the drive from the initiator to a number of sequential logical blocks. This command is useful for writing 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 zero, 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. Ultrastar 146Z10 hard disk drive specifications 174

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8.45 WRITE SAME (41h)
LINK
FLAG
Reserved = 0
VU = 0
9
(MSB)
Number of Blocks
(LSB)
7
8
Reserved = 0
6
(MSB)
Logical Block Address
(LSB)
2
3
4
5
RelAdr
=0
Reserved = 0
Reserved = 0
1
Command Code = 41h
0
0
1
2
3
4
5
6
7
Bit
Byte
Figure 175. WRITE SAME (41)
The Write Same command instructs the drive to write a single block of data transferred to the drive from
the initiator to a number of sequential logical blocks. This command is useful for writing 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 spe-
cifies the number of contiguous blocks to be written. If the number is zero, 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.
Ultrastar 146Z10 hard disk drive specifications
174