Hp Smart Storage Administrator Manual do Utilizador descarregar pdf (Página 66)

Operations 66

• If you do not specify a stripe size, the CLI uses the default stripe size value for the RAID level that you

specify.

Example commands:

=> ctrl slot=3 ld 1 modify raid=1

=> ctrl slot=4 ld 2 modify ss=16

=> ctrl slot=2 ld 3 modify raid=5 ss=16

Setting the preferred path mode

The preferred path mode determines how I/O traffic to the logical drives is managed on controllers that are

in an active/active configuration.

• In Automatic mode, the storage system automatically selects a suitable path for I/O traffic to each

logical drive depending on the host I/O patterns at the time. Because the optimum path can vary with

time, I/O traffic for any given logical drive can be directed through either controller.

• In Manual mode, all I/O traffic to a given logical drive is directed through a designated controller. In

this case, you must also specify the preferred controller for each logical drive ("Assigning a redundant

controller to a logical drive" on page 66).

Syntax:

<target> modify [preferredpathmode=automatic|manual|?]

where <target> is a redundant controller.

Example command:

controller ch="lab 3" modify ppm=manual

Assigning a redundant controller to a logical drive

When you have set the preferred path mode ("Setting the preferred path mode" on page 66) in a redundant

system to Manual, you must use the chassisslot command to assign each logical drive in the system to

one of the redundant controllers.

Syntax:

<target> modify [chassisslot=#|?]

where <target> is a valid logical drive on a controller that is in an active/active configuration and #

denotes the chassis slot number of the redundant controller. (To obtain the chassis slot number, use the show

command on the controller.)

Example command:

controller ch="lab 3" ld 1 modify chs=2

Disabling a redundant controller

This command disables a redundant controller that is in an Active-Standby configuration.

IMPORTANT: The redundant controller cannot be re-enabled after you have disabled it.

Syntax:

<target> modify redundantcontroller=disable

where <target> is a controller that has an enabled redundant controller.

Example command:

=> ctrl ch="redundant Lab4" modify rc=disable

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Hp Smart Storage Administrator Manual do Utilizador Página 66