HP XP Array Manager Software - Manual (Page 49)

A Device Types Other Than OPEN-V
This appendix lists Cache Residency information for open system volumes other than OPEN-V:
OPEN-3, OPEN-8, OPEN-9, OPEN-E, and OPEN-L. To ensure product compatibility with your
device type, contact your HP service representative for the latest information.
Configuring Cache for Priority Mode
When configuring cache for device types other than OPEN-V, remember that the capacity per slot
is 66 KB.
Cache Residency Cache Extents
For open-systems volumes, Cache Residency cache extents must be defined in logical blocks using
logical block addresses (LBAs) with a minimum size of 96 LBAs (equivalent to 66 KB) for other
than OPEN-V. However, in most cases, users will assign an entire open-system volume for Cache
Residency. If the remaining cache memory is less than 256 MB, Cache Residency is not available.
“Cache Residency Specifications” (page 49) outlines cache residency specifications.
Table 8 Cache Residency Specifications
Specifications Item
OPEN-3, 8, 9, E, L Emulation Type
At least 96 LBAs , equivalent to 66 KB. Cache Area
Allocation
Normal volumes, LUSE volumes and Virtual LUN volumes. Supported
Volumes
4,096 per LDEV and per subsystem. Number of cache
areas
Logical Blocks
For device types other than OPEN-V, Cache Residency recognizes open-system logical blocks in
96-block increments. For example, if you enter a starting LBA as 1 and an ending LBA as less than
96, Cache Residency automatically changes the beginning LBA to 00 and the ending LBA to 95.
“Logical Block Addresses for Device Types Other Than OPEN-V” (page 49) shows the LBA blocks
for open systems other than OPEN-V.
Table 9 Logical Block Addresses for Device Types Other Than OPEN-V
Notes Ending LBA Starting LBA Ending LBA Starting LBA
192095 192000 95 0
288095 288000 191 96
384095 384000 287 192
480095 480000 383 288
576095 576000 479 384
672095 672000 575 480
768095 768000 671 576
864095 864000 767 672
960095 960000 863 768
1920095 1920000 959 864
Configuring Cache for Priority Mode 49