Use the chmdiskgrp command to modify
the name that is assigned to a storage pool or to set the warning
threshold for the storage pool.
Syntax
chmdiskgrp [ -namenew_name_arg ] [ -sizenew_size ] [ -warning { disk_size_percentage% } disk_size [ -unit { b | kb | mb | gb | tb | pb } ] ] [ -easytier { auto | on | off | measure } ] { mdisk_group_name | mdisk_group_id }
Parameters
- -namenew_name_arg
- Specifies the new name of the storage pool.
- -warningdisk_size | disk_size_percentage%
- (Optional) Sets a threshold at which a warning is generated. The
warning is generated the first time that the threshold is exceeded
by the used-disk capacity in the storage pool. You can specify a disk_size integer,
which defaults to megabytes (MB) unless the -unit parameter
is specified; or you can specify a disk_size%,
which is a percentage of the storage pool size. To disable warnings,
specify 0 or 0%.
- -sizenew_size
- (Optional) Specifies the new size of a child pool.
Note: This parameter cannot be used with parent pools. Use addmdisk or rmmdisk to
change storage pool capacity.
- -unitb | kb | mb | gb |
tb | pb
- (Optional) Specifies the data units for the -warning parameter.
- mdisk_group_id | mdisk_group_name
- (Required) Specifies the ID or name of the storage pool
to modify.
- -easytierauto | on | off
| measure
- Specifies if the Easy Tier function
is on or off for this storage pool, or if it is automatically determined. -easytier is active in
storage pools with multiple tiers and is balance with
single tiers.
Note: -easytier must
be followed by one of the following:
- If -easytier is
set to auto, Lenovo Storage V7000 automatically
enables Easy Tier ® functions when
the storage pool contains MDisks from more than one tier, and enables
automatic rebalancing when the storage pool contains MDisks from only
one tier.
- If -easytier is set to on,
then Easy Tier functions are
active.
- If -easytier is set to off,
then Easy Tier functions are
inactive.
- If -easytier is
set to measureEasy Tier statistics
are collected but Easy Tier management
is disabled. (No extents are moved by Easy Tier.)
auto equates
to:
- on if Easy Tier is
licensed or no license is required
- off if Easy Tier is
not licensed and a license is required
Specifying
-easytier on enables
Easy Tier :
- Management of both single-tier and multi-tier pools
- Auto rebalance
Extents are moved to balance the I/O load on the MDisks in the
pool.
Description
Table 1. Parameter
differences for child pools and parent pools| Parameter |
Child pool usage |
Storage pool usage |
|---|
| -name |
Optional |
Optional |
| -easytier |
Cannot be used with child pools |
Optional |
| -size |
Optional |
Cannot be used with parent pools |
| -unit |
Optional |
Optional |
| -warning |
Optional |
Optional |
This command modifies the name, or label, assigned to a
given storage pool. You can use the new name to refer to the storage
pool.
The command can also be used to set the warning threshold
for the storage pool. The warning threshold is the threshold at which
a warning is generated when it is exceeded by the used-disk capacity
in the storage pool.
You can also use this command
to change other settings for parent pools and child pools.
An invocation example
chmdiskgrp -name testmdiskgrp -easytier on Group0
The
resulting output:
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An
invocation example
chmdiskgrp -size 100 -unit tb mypool
The
resulting output:
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