Write Same (32) - (7F/0D) - Hitachi ULTRASTAR 15K450 HUS154530VLF400 Specifications

19.63 WRITE SAME (32) - (7F/0D)

Table 251: Write Same (32) - (7F/0D)
Byte
7
0
1 VU = 0
2-5
6 Reserved = 0
7
8 - 9
10 WRPROTECT
11
(MSB)
12 - 19
(MSB)
20 - 23
(MSB)
24 - 25
(MSB)
26 - 27
(MSB)
28 - 31
The WRITE SAME command requests that the drive write a single block of data transferred from the initiator to disk for a
number of sequential logical blocks. This command is useful for writing large data areas with the same data, without sending
all of the data over the interface. Each logical block transferred includes user data and may include protection information,
based on the WRPROTECT field and the drive format. Each logical block written includes user data and, if the drive is for-
matted with protection information enabled, protection information.
6 5 4
Command Code = 7Fh
Reserved = 0
Reserved = 0
Additional CDB Length = 18h
Service Action = 000Dh
Reserved = 0
Reserved = 0
Logical Block Address
Expected Initial Logical Block Reference Tag
Expected Logical Block Application Tag
Logical Block Application Tag Mask
Number of Blocks
Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
Bit
3 2
Group Number = 0
PBDATA LBDATA
=0
304
1 0
FLAG LINK
Reserved
=0 =0
(LSB)
(LSB)
(LSB)
(LSB)
(LSB)