Hp NetRAID-4M Controller Uživatelský manuál stáhnout pdf (Strana 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

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Hp NetRAID-4M Controller Uživatelský manuál Strana 231