HP Understanding HBA Mode and Smart Array Advanced Pack License Key Management

CAUTION: Specifying the write-back cache write policy could result in data loss in the event of failure of the cache volume. When using a RAID 0 cache volume, a single SSD failure might result in data loss.

IMPORTANT: If a demo license key expires, all SmartCache volumes configured with write-back cache write policy are converted to write -through. When this happens, the logical drive details show different values for Cache Write Policy and Cache Write Policy Requested. If the license is reinstalled, the SmartCache volumes are restored to their original write-back cache write policy.

Syntax:

<target> create [type=ldcache][drives=#:#:#][datald]=# [writepolicy=readonlywritethroughwriteback?]

where <target> is any valid SSD drive and existing non-cached logical drive for the datald.

Example command:

ctrl slot=1 create type=ldcache drives=1i:1:1,1i:1:2 datald=1 ctrl slot=1 create type=ldcache drives=1i:1:1,1i:1:2 datald=1 writepolicy=writethrough

ctrl slot=1 create type=ldcache

drives=1i:1:1,1i:1:2 datald=1 writepolicy=writethrough raid=1 ctrl slot=1 create type=ldcache drives=1i:1:1,1i:1:2 datald=1 writepolicy=writeback

Managing FLS

IMPORTANT: Setting a higher level of FLS can result in a loss of throughput for some request patterns.

This setting controls the flexible latency scheduler.

Syntax:

<target> modify [latency=lowhighdisable?]

Where the <target> is any valid individual controller target that supports the flexible latency scheduler feature.

Example command:

<controller slot=5 modify latency=low>

Managing modes

HBA mode

IMPORTANT: Enabling HBA Mode exposes the physical drives to the operating system. Smart Array configuration is not allowed.

Syntax:

<target> modify [hbamode=onoff?]

Where <target> is any valid controller supporting this feature.

Example command:

controller slot=1 modify hbamode=on ctrl slot=1 modify hbamode=off

Operations 79