lsarrayrecommendation

Use the lsarrayrecommendation command to view a recommended configuration for the specified drive class and number of drives.

Syntax

lsarrayrecommendation -driveclassdrive_class_id -drivecountdrive_count [ -nohdr ] [ -filtervalue? ] [ -filtervalueattribute=value ] [ -delimdelimiter ] { mdiskgrp_id | mdiskgrp_name }

Parameters

-driveclassdrive_class_id

(Required) Specifies the drive class, or classes, for which the array recommendation is made. You must specify at least 1 drive_class_id value. You can specify a total of 32 drive_class_id values on a single command; however, you must separate each value with a colon character (:).

-drivecountdrive_count

(Required) Specifies the number of drives for which to make recommendation. You must specify at least 1 drive_count value. You can specify a total of 32 drive_count values on a single command; however, you must separate each value with a colon character (:).
Remember: Each drive_count value must be a numerical value between 2 and 128 (only redundant arrays are considered).

-nohdr

(Optional) By default, headings are displayed for each column of data in a concise style view, and for each item of data in a detailed style view. The -nohdr parameter suppresses the display of these headings.
Note: If there is no data to be displayed, headings are not displayed.

-filtervalueattribute=value

(Optional) Specifies a list of one or more filter attributes that match the specified values; see -filtervalue? for the supported attributes.

Note: Some filters allow the use of a wildcard; the following rules apply when using a wildcard character:

The wildcard character is an asterisk (*).

The command can contain a maximum of one wildcard, which must be the first or last character in the string.

You must enclose the filter entry within double quotation marks ("").

-filtervalue?

(Optional) Includes all of the valid filter attributes in the report. The following filter attributes are valid for the lsarrayrecommendation command:

raid_level

distributed

Any parameters that are specified with the -filtervalue? parameter are ignored.
For more information about filtering attributes, see Attributes of the -filtervalue parameters.

-delimdelimiter

(Optional) By default, in a concise view all columns of data are space-separated, with the width of each column set to the maximum width of each item of data. In a detailed view, each item of data is an individual row, and if you display headers, the data is separated from the header by a space. The -delim parameter overrides this behavior. Valid input for the -delim parameter is a 1-byte character. Enter -delim : on the command line. The colon character (:) separates all items of data in a concise view (for example, the spacing of columns does not occur). In a detailed view, the specified delimiter separates the data from its header.

mdiskgrp_id

mdiskgrp_name

(Required) The ID or name of the pool for which to make the recommendation.

Description
This command displays the system-recommended array configuration for a specific drive class and number of drives.

Encrypted pools are not recommended because distributed arrays do not support encryption. You cannot add an unencrypted array to a parent pool set (which means a parent pool and its child pools) that is encrypted.

Table 1 provides the attribute values that can be displayed as output view data.

Table 1. lsarrayrecommendation output

Attribute Possible Values

mdiskgrp_id Indicates the MDisk group ID

mdiskgrp_name Indicates the MDisk group name

drive_class_id Indicates the drive class ID for the recommendation.

raid_level Indicates the recommended RAID level.

distributed Indicates whether this is a distributed array recommendation.

min_stripe_width Indicates the stripe width minimum.

max_stripe_width Indicates the stripe width maximum.

stripe_width Indicates the recommended stripe size for this storage pool.

rebuild_areas Indicates the recommended number of rebuild areas.

strip_size Indicates the recommended strip size for this storage pool.

drive_count Indicates the number of drives to configure per array.

array_count Indicates the number of arrays that can be created at the recommended drive count.

capacity Indicates the expected usable capacity for virtualization for the array or arrays.

An invocation example
Making a recommendation for more rebuild areas and larger stripe width because there are other existing arrays in the MDisk group:

lsarrayrecommendation -driveclass 2 -drivecount 60 dist_pool

The detailed resulting output:

mdisk_grp_id mdisk_grp_name drive_class_id raid_level distributed min_stripe_width max_stripe_width stripe_width rebuild_areas strip_size drive_count array_count capacity 0 dist_pool 2 raid6 yes 5 16 12 3 256 60 1 255.2TB

An invocation example
Making a recommendation for a new (empty) storage pool and with a row for each raid level:

lsarrayrecommendation -driveclass 2 -drivecount 80 mdiskgrp0

The detailed resulting output:

mdisk_grp_id mdisk_grp_name drive_class_id raid_level distributed min_stripe_width max_stripe_width stripe_width rebuild_areas strip_size drive_count array_count capacity 0 mdiskgrp0 2 raid5 yes 3 16 6 2 256 40 2 410.1TB 0 mdiskgrp0 2 raid6 yes 5 16 12 3 256 40 2 400.1TB 0 mdiskgrp0 2 raid5 yes 2 16 8 2 256 40 2 380.1TB 0 mdiskgrp0 2 raid1 no 2 16 2 256 10 8 410.1TB 0 mdiskgrp0 2 raid5 no 3 16 10 256 10 7 410.1TB 0 mdiskgrp0 2 raid6 no 5 16 10 256 10 7 400.1TB 0 mdiskgrp0 2 raid5 no 2 16 8 256 8 9 380.1TB

An invocation example
Making a recommendation for multiple drive classes for a new (empty) storage pool:

lsarrayrecommendation -driveclass 3:5 -drivecount 80:24 mdiskgrp0

The detailed resulting output:

mdisk_grp_id mdisk_grp_name drive_class_id raid_level distributed min_stripe_width max_stripe_width stripe_width rebuild_areas strip_size drive_count array_count capacity 0 mdiskgrp0 3 raid5 yes 3 16 6 2 256 40 2 500.4TB 0 mdiskgrp0 3 raid6 yes 5 16 12 3 256 40 2 480.4TB 0 mdiskgrp0 3 raid5 yes 2 16 8 2 256 40 2 450.4TB 0 mdiskgrp0 3 raid1 no 2 16 2 256 10 8 400.6TB 0 mdiskgrp0 3 raid5 no 3 16 10 256 10 7 500.6TB 0 mdiskgrp0 3 raid6 no 5 16 10 256 10 7 480.6TB 0 mdiskgrp0 3 raid5 no 2 16 8 256 8 9 450.6TB 0 mdiskgrp0 5 raid5 yes 3 16 6 2 256 12 2 200.7TB 0 mdiskgrp0 5 raid6 yes 5 16 12 3 256 12 2 180.7TB 0 mdiskgrp0 5 raid5 yes 2 16 8 2 256 8 3 150.7TB 0 mdiskgrp0 5 raid1 no 2 16 2 256 8 3 100.2TB 0 mdiskgrp0 5 raid5 no 3 16 12 256 12 2 200.2TB 0 mdiskgrp0 5 raid6 no 5 16 12 256 12 2 180.2TB 0 mdiskgrp0 5 raid5 no 2 16 8 256 8 3 150.2TB

Attribute	Possible Values
mdiskgrp_id	Indicates the MDisk group ID
mdiskgrp_name	Indicates the MDisk group name
drive_class_id	Indicates the drive class ID for the recommendation.
raid_level	Indicates the recommended RAID level.
distributed	Indicates whether this is a distributed array recommendation.
min_stripe_width	Indicates the stripe width minimum.
max_stripe_width	Indicates the stripe width maximum.
stripe_width	Indicates the recommended stripe size for this storage pool.
rebuild_areas	Indicates the recommended number of rebuild areas.
strip_size	Indicates the recommended strip size for this storage pool.
drive_count	Indicates the number of drives to configure per array.
array_count	Indicates the number of arrays that can be created at the recommended drive count.
capacity	Indicates the expected usable capacity for virtualization for the array or arrays.