Hitachi ULTRASTAR 15K450 HUS154530VLF400 - Manual (Page 318)

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
302
19.61 WRITE SAME (41)
Table 249: 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 for writing large data areas without sending all of the data over
the SCSI bus.
• See the WRITE(10) command description for the definition of the WRPROTECT field.
• 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.
• Number of Blocks specifies the number of contiguous blocks to be written. If the number is zero, all of the remain-
ing 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.
Byte
Bit
7 6 5 4 3 2 1 0
0 Command Code = 41h
1 WRPROTECT Reserved = 0
PBDA
TA=0
LBDA
TA=0
Obso-
lete
2-5
(MSB)
Logical Block Address
(LSB)
6 Reserved = 0
7-8
(MSB) Number of Blocks
(LSB)
9 VU = 0 Reserved = 0 FLAG LINK