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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 syntax, see Command

syntax. If this parameter is not specified, only system-wide settings are shown.

Output System/controller cache parameters:

Operation Mode

The operation mode, also called the redundancy mode.

• Active-Active ULP: Both controllers are active using ULP (Unified LUN Provisioning).

• 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.

Write Back Status

Shows whether write-back caching is enabled for the controller

CompactFlash Status

Shows whether whether the controller’s CompactFlash card is installed

Cache Flush

Shows whether cache flush is enabled for the controller

Volume cache parameters:

Serial Number

If a volume is specified, its serial number

Name

If a volume is specified, its name

Cache Write Policy

If a volume is specified, its cache policy, either write-back or write-through

Cache Optimization

If a volume is specified, its cache optimization mode, either standard (random) or super-sequential

Read Ahead Size

If a volume is specified, its read-ahead cache setting

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HP Modular Smart Array 500 Starter Kit Guía de usuario Pagina 112