Hp StorageWorks 2000 Family Modular Smart Array CLI reference guide (481600-002, May 2008)

Chapter 3 Command Descriptions 157
show cache-parameters
Description
Shows cache settings for the storage system and optionally for a specified volume.
Input
Output
show cache-parameters [volume]
Parameter Description
volume Optional. Specifies the volume by its name or serial number. For the
syntax to use, see “Volume Syntax” on page 26. If this parameter is not
specified, the volume-specific data is not displayed.
Field Description
Operation Mode The operation mode, also called the “redundancy mode.”
• Active-Active ULP: SAS only. Both controllers are
active using ULP (Unified LUN Provisioning), which
means 128 LUNs are available for mapping volumes.
• Active-Active: FC and iSCSI only. Both controllers
are active, and each has 128 LUNs for mapping volumes
owned by that controller only.
• Independent Cache Performance Mode: Cache
mirroring and failover between controllers is disabled,
which results in improved write performance but at a risk
of loss of unwritten data if a controller failure occurs while
there is data in the controller’s cache memory.
• Single-Controller: There is only a single controller
in the enclosure.
Controller ID
Write-back
Status
For each controller, shows whether write-back caching is
enabled or disabled
Volume Serial If a volume is specified, its serial number
Volume Name If a volume is specified, its name