Ultrastar C10K600 OEM Specification

18.61 WRITE SAME (41)

Table 212: WRITE SAME (41)

Byte

0

7 6 5

Bit

4 3

Command Code = 41h

2 1 0

1 WRPROTECT Reserved = 0

PBDA

TA=0

LBDA

TA=0

Obsolete

(MSB)

2-5 Logical Block Address

(LSB)

6 Reserved = 0

(MSB)

7-8 Number of Blocks

9 VU = 0 Reserved = 0 FLAG

(LSB)

LINK

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 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.

HGST Ultrastar C10K600 (SAS) Hard Disk Drive Specification

257