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ManualsBrandsSeagate Bulk ManualsSeagate Bulk Hard Drives & Storage4TB ENT CAP 3.5 HDD SATA 7200 RPM 128MB 3.5IN
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SCSI Commands Reference Manual, Rev. J 476
www.seagate.com Parameters for direct access devices
PERIPHERAL QUALIFIER field and the PERIPHERAL DEVICE TYPE field
The PERIPHERAL QUALIFIER field and the PERIPHERAL DEVICE TYPE field are defined in SPC-5.
PAGE CODE field and PAGE LENGTH field
The PAGE CODE field and PAGE LENGTH field are defined in SPC-5 and shall be set to the values shown in table 450 for the Block Limits VPD
page.
WSNZ bit
1 A write same non-zero (WSNZ) bit set to one indicates that the device server does not support a value of zero in the NUMBER OF LOGI-
CAL BLOCKS field in the WRITE SAME command CDBs (see 3.73, 3.74, and 3.75).
0 A WSNZ bit set to zero indicates that the device server may or may not support a value of zero in the NUMBER OF LOGICAL BLOCKS field
of the WRITE SAME commands.
MAXIMUM COMPARE AND WRITE LENGTH field
A MAXIMUM COMPARE AND WRITE LENGTH field set to a non-zero value indicates the maximum value that the device server accepts in the
NUMBER OF LOGICAL BLOCKS field in the COMPARE AND WRITE command (see SBC-4). A MAXIMUM COMPARE AND WRITE LENGTH field set to
zero indicates that the device server does not support the COMPARE AND WRITE command. The device server shall set the MAXIMUM COM
-
PARE AND WRITE LENGTH field to a value less than or equal to the value in the MAXIMUM TRANSFER LENGTH field.
OPTIMAL TRANSFER LENGTH GRANULARITY field
The OPTIMAL TRANSFER LENGTH GRANULARITY field set to a non-zero value indicates the optimal transfer length granularity size in logical
blocks for a single command shown in the command column of
table 451. If a device server receives one of these commands with a transfer
size that is not equal to a multiple of this value, then the device server may incur significant delays in processing the command. An OPTIMAL
TRANSFER LENGTH GRANULARITY field set to 0000_0000h indicates that the device server does not report optimal transfer length granularity.
56 (MSB)
MAXIMUM ATOMIC TRANSFER LENGTH WITH ATOMIC BOUNDARY. . .
59 (LSB)
60 (MSB)
MAXIMUM ATOMIC BOUNDARY SIZE. . .
63 (LSB)
Table 450 Block Limits VPD page (Sheet 2 of 2)
Bit
Byte
7 6 5 4 3 2 1 0