Show Cache-Parameters - HP P2000 G3 Cli Reference Manual

show cache-parameters

Description Shows cache settings and status for the system and optionally for a volume.
Syntax
show cache-parameters [volume]
Parameters volume
Optional. Name or serial number of the volume to show settings for. For volume syntax, see
Command syntax
shown.
Output System/controller cache parameters:
Operation Mode
Shows the system's operating mode, also called the cache redundancy mode:
• Active-Active ULP: Both controllers are active using ULP (Unified LUN Presentation). Data
for volumes configured to use write-back cache is automatically mirrored between the two
controllers to provide fault tolerance.
• Single Controller: There is only a single controller in the enclosure.
• Fail Over: Operation has failed over to one controller because its partner is not operational.
The system has lost redundancy.
• Down: Both controllers are not operational.
Write Back Status
Shows the current, system-wide cache policy as determined by auto-write-through (AWT) logic. This
value is not settable by users. If an AWT trigger condition (such as a CompactFlash failure) is met,
the cache policy for all volumes changes to write-through, overriding the volume-specific settings.
When the problem is corrected, the cache policy reverts to the value configured for each individual
volume.
• Enabled: Write-back. This is the normal state.
• Disabled: Write-through.
• Not up: The controller is not up.
CompactFlash Status
• Not Installed: The CompactFlash card is not installed.
• Installed: The CompactFlash card is installed.
• Unknown: The CompactFlash card's status is unknown.
Cache Flush
• Enabled: If the controller loses power, it will automatically write cache data to the
CompactFlash card. Cache flush is normally enabled, but is temporarily disabled during
controller shut down.
• Disabled: Cache flush is disabled.
Volume cache parameters:
Serial Number
If a volume is specified, its serial number.
Name
If a volume is specified, its name.
on page 22. If this parameter is not specified, only system-wide settings are
HP P2000 G3 MSA System CLI Reference Guide 197