AMCC 3WARE 9590SE Betriebsanweisung PDF herunterladen (Seite 78)

Chapter 2. CLI Syntax Reference

72 3ware Serial ATA RAID Controller User Guide

set qpolicy=on|off

This feature only applies to 9000 series SX/SE/SA model controllers.

This command sets the queue policy of the firmware. If the queue policy is

on, the firmware utilizes the drive’s queueing policy. If any drives do not

support a queueing policy, this policy will have no effect on those drives.

For a spare unit, drive queuing is not meaningful or applicable. When a spare

becomes part of a true unit during a rebuild, it adopts the queue policy of the

''new'' parent unit. Thus, this command does not set the queue policy for the

spare unit type.

Note: Queing is only applicable for SATA drives.

By default, qpolicy is

on.

Example:

//localhost> /c0/u5 set qpolicy = on

Setting Command Queuing Policy for unit /c0/u5 to [on] ... Done.

set storsave=protect|balance|perform [quiet]

This feature only applies to 9000 series SX/SE/SA model controllers.

This command sets the storsave policy to be either protect, balance, or

perform when the unit write cache is enabled. The default setting is protect.

The storsave policy adjusts several factors that control the balance between

protection and performance on a unit. There is a trade-off among the available

settings. The following description about the settings should help you to

decide which one is suitable to you and your application. You will find further

discussion of this setting in the 3ware Serial ATA RAID Controller User

Guide, under “About StorSave Profile Levels” on page 106.

protect provides the maximum data protection among the controller settings.

When storsave is set to protect mode, it means:

• When the unit becomes degraded, the write cache will be disabled.

• Write journaling is enabled. All data flushing from controller cache will

be flushed to media.

• Incoming FUA (Force Unit Access) host requests will be honored unless

a BBU is installed and enabled, in which case, they will be ignored.

perform provides the maximum performance and least data protection of the

three controller settings. When storsave is set to perform mode, it means:

• When the unit becomes degraded, the write cache will not be disabled.

• Write journaling is disabled. All data flushing from controller cache will

be flushed to disk. If a BBU is present, this essentially disables the BBU

for this unit.

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AMCC 3WARE 9590SE Betriebsanweisung Seite 78