Quantum 10K II - Manual (Page 140)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–73
MODE SELECT (6) Command (15h) (continued)
5.14.3.6 Caching Page (08h)
The Caching Page controls the drive’s cache management policy.
Bit
Byte
7 6 5 4 3 2 1 0
0 PS Rsvd Page Code (08h)
1 Page Length (12h)
2 Reserved WCE MF RCD
3 Demand Read Retention Priority Demand Write Retention Priority
4 – 5 Disable Pre-Fetch Transfer Length
6 – 7 Minimum Pre-Fetch
8 – 9 Maximum Pre-Fetch
10 – 11 Maximum Pre-Fetch Ceiling
12 FSW LBCSS DRA VS VS Reserved
13 Number of Cache Segments
14 – 15 Cache Segment Size
16 Reserved
17 – 19 Non-Cache Segment Size
NOTES: 1. Fully supported and temporary fields are underlined. Informational fields are
not underlined. The PS bit is underlined, meaning it will be set on a MODE
SENSE command, since the page is savable
2. Bytes 12 to 19 are returned only if the device operating definition is SCSI-3.
Figure 5–32 Caching Page — Data Format