HP P2000 G3 Cli Reference Guide

HP P2000 G3 MSA System CLI Reference Guide 197
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 on page 22. If this parameter is not specified, only system-wide settings are
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.

HP P2000 G3 Specifications

General

Brand	HP
Model	P2000 G3
Category	Storage
Language	English