chmdisk

Use the chmdisk command to modify the name or IBM® Easy Tier® settings for a managed disk (MDisk).

Syntax

Read syntax diagramSkip visual syntax diagram
>>- chmdisk -- --+-------------------------+-- ----------------->
                 '- -name -- new_name_arg -'      

>--+--------------------------------+--------------------------->
   '- -tier --+- tier0_flash -----+-'   
              +- tier1_flash -----+     
              +- tier_enterprise -+     
              '- tier_nearline ---'     

>--+--------------------------------+--+- mdisk_id ---+--------><
   '- -easytierload --+-default---+-'  '- mdisk_name -'   
                      +-low-------+                       
                      +-medium----+                       
                      +-high------+                       
                      '-very_high-'                       

Parameters

-name new_name_arg
(Optional) Specifies the new name to be applied to the managed disk.
-tier tier0_flash | tier1_flash | tier_enterprise | tier_nearline
(Optional) Specifies the new tier of the MDisk. The values are:
tier0_flash
Specifies a tier0_flash hard disk drive or an external MDisk for the newly discovered or external volume.
tier1_flash
Specifies an tier1_flash (or flash drive) hard disk drive or an external MDisk for the newly discovered or external volume.
tier_enterprise
Specifies a tier_enterprise hard disk drive or an external MDisk for the newly discovered or external volume.
tier_nearline
Specifies a tier_nearline hard disk drive or an external MDisk for the newly discovered or external volume.
-easytierload default | low | medium | high | very_high
(Optional) Specifies the Easy Tier load (amount) to place on a non-array MDisk within its tier.
If Easy Tier is either overusing or under-utilizing a particular MDisk, modify the easy_tier_load value to change the load size.
Note: Specifying default returns the performance capability to the value used by the system. Specify very_high only if the MDisk tier is ssd.
mdisk_id | mdisk_name
(Required) Specifies the ID or name of the managed disk to modify.

Description

This command modifies the attributes of a managed disk.

An invocation example

chmdisk -tier tier0_flash mdisk13 

The resulting output:

No feedback

An invocation example

chmdisk -tier tier_nearline mdisk0

The resulting output:

MDisk Group, id [13], successfully created

An invocation example

chmdisk -easytierload high mdisk0

The resulting output:

MDisk Group, id [13], successfully created