HP NetRAID-4M Controller - Manual (Page 231)

9-23
Modifying Containers
Understanding the NVRAM Write-back Cache Attributes You can
Specify
You use the container set cache command to enable a
container’s NVRAM write-back cache. Before enabling a container’s
NVRAM write-back cache, consider the following attributes you can
specify:
■ Unprotected
■ Enable write cache
Setting a Container’s NVRAM Write-back Cache to Unprotected
The unprotected attribute indicates whether to set the container’s
NVRAM write-back cache to disable, enable when protected, or
enable always. You use the
unprotected attribute in conjunction
with the enable write cache attribute to accomplish the desired
setting.
In the following example, the container set cache command
with the /unprotected switch enables the NVRAM write-back cache
on container 0 only if a battery is present and its status is Ok. Note
that the affect of the /unprotected switch is determined by the
setting of the /write_cache_enable switch. See Enabling Write Cache
on page 9-23 for further information.
HPN0> container set cache /write_cache_enable=TRUE
/unprotected=FALSE 0
Executing: container set cache /write_cache_enable=TRUE
/unprotected=FALSE 0
Enabling Write Cache
The enable write cache attribute indicates whether to set the
container’s NVRAM write-back cache to disable, enable when
protected, or enable always. You use this attribute in conjunction
with the /unprotected switch to accomplish the desired setting. The