User Manual

SCSI Commands Reference Manual, Rev. J 475
www.seagate.com Parameters for direct access devices
5.4.5 Block Limits VPD page (B0h)
The Block Limits VPD page (see table 450) provides the application client with the means to obtain certain operating parameters
of the logical unit.
Table 450 Block Limits VPD page (Sheet 1 of 2)
Bit
Byte
7 6 5 4 3 2 1 0
0 PERIPHERAL QUALIFIER PERIPHERAL DEVICE TYPE
1 PAGE CODE (B0h)
2 (MSB)
PAGE LENGTH (003Ch)
3 (LSB)
4 Reserved WSNZ
5 MAXIMUM COMPARE AND WRITE LENGTH
6 (MSB)
OPTIMAL TRANSFER LENGTH GRANULARITY
7 (LSB)
8 (MSB)
MAXIMUM TRANSFER LENGTH. . .
11 (LSB)
12 (MSB)
OPTIMAL TRANSFER LENGTH. . .
15 (LSB)
16 (MSB)
MAXIMUM PREFETCH LENGTH. . .
19 (LSB)
20 (MSB)
MAXIMUM UNMAP LBA COUNT. . .
23 (LSB)
24 (MSB)
MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT. . .
27 (LSB)
28 (MSB)
OPTIMAL UNMAP GRANULARITY. . .
31 (LSB)
32 UGAVALID (MSB)
UNMAP GRANULARITY ALIGNMENT. . .
35 (LSB)
36 (MSB)
MAXIMUM WRITE SAME LENGTH. . .
43 (LSB)
44 (MSB)
MAXIMUM ATOMIC TRANSFER LENGTH. . .
47 (LSB)
48 (MSB)
ATOMIC ALIGNMENT. . .
51 (LSB)
52 (MSB)
ATOMIC TRANSFER LENGTH GRANULARITY. . .
55 (LSB)