HP NetRAID-4M Controller - Manual (Page 229)

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Modifying Containers
To work with enabling a container’s volatile read-ahead cache, you
must understand:
■ The container set cache attributes you can specify
■ How to enable a container’s volatile read-ahead cache
The following sections discuss each of these topics.
Understanding the Read-ahead Cache Attributes You can Specify
You use the container set cache command to enable a
container’s volatile read-ahead cache. Before enabling a container’s
volatile read-ahead cache, consider the following attribute you can
specify:
■ enable read cache
The enable read cache attribute indicates whether to enable
the volatile read-ahead cache. Note that if you disable the read-
ahead cache, no other characteristics can be set.
In the following example, the container set cache command
with the /read_cache_enable switch enables the volatile read-ahead
cache on container 0.
HPN0> container set cache /read_cache_enable=TRUE 0
Executing: container set cache /read_cache_enable=TRUE 0
Understanding How to Enable a Container’s Volatile Read-ahead
Cache
This section provides an example that describes how to enable a
container’s volatile read-ahead cache.
Before enabling a container’s volatile read-ahead cache, use the
container list command to display information about your
containers, as in the following example. In the example, the Type
column indicates a Volume set on container 0, and the Usage
column indicates None, which means no file system resides on
container 0.
HPN0> container list
Executing: container list
Cluster Num Total Oth Stripe Scsi Partition
Dr Partner Label Type Size Ctr Size Usage C:ID:L Offset:Size
-- ------- ----- ------ ------ --- ------ ------- ------ -------------
0 0 Volume 100MB None 2:01:0 64.0KB: 100MB