lsdriveclass

Use the lsdriveclass command to display all drive classes in the system.

Syntax

Parameters

-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.

-filtervalue attribute=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 when you specify the command. The following rules apply to the use of wildcards when you use the CLI:

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.
When you specify a wildcard character, you must enclose the filter entry within double quotation marks (""), as follows:
```
lsdriveclass -filtervalue  "IO_group_name=md*"
```

-filtervalue?

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

id
RPM
capacity
IO_group_id
IO_group_name
tech_type
block_size
candidate_count
superior_count
total_count

Any parameters that are specified with the -filtervalue? parameter are ignored.

For more information about filtering attributes, see Attributes of the -filtervalue parameters.

-delim delimiter

(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. Specify -delim : on the command line, and 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.

drive_class_id

(Optional) The identity of the drive class.

Description

This command displays all drive classes in a system. Drives are displayed if they are managed.

This table provides the attribute values that can be displayed as output view data.

Table 1. lsdriveclass output
Attribute	Possible Values
id	Indicates the drive class ID.
RPM	Indicates the speed of the drive class.
capacity	Indicates the capacity of the drive class.
IO_group_id	Indicates the I/O group ID associated with the drive class.
IO_group_name	Indicates the I/O group name that is associated with the drive class.
tech_type	Indicates the technology type of the drive class. tier0_flash tier1_flash tier_enterprise tier_nearline tier_scm
block_size	Indicates the block size of the drive class.
candidate_count	Indicates the number of drives in the drive class that are in `candidate` state.
superior_count	Indicates the total number of drives in this class and the drives that count as superior. (This value applies to distributed arrays created by using mkdistributedarray.)
total_count	Indicates the total number of drives in the drive class. The drive state is irrelevant.
transport_protocol	Indicates the transport protocol of the drive. Blank for Flashsystem V9000 AE1 and AE2 enclosures. The possible values are: sas nvme
compressed	Indicates whether the drive is compressed.
physical_capacity	For compressed drives, this output represents the total amount of physical storage on the drive. This value can be smaller than the logical capacity presented by the capacity value. For non-compressed drives, the physical_capacity is the same as the logical capacity.

A concise invocation example

lsdriveclass -filtervalue block_size=4096

The detailed resulting output:

 id  RPM    capacity   IO_group_id  IO_group_name  tech_type  block_size  candidate_count  superior_count  total_count
 3   15000  600.5GB    2            io_group2      tier0_flash    4096        0                0                24

A concise invocation example

lsdriveclass -filtervalue io_group_ID=0:tech_type=tier_enterprise

The detailed resulting output:

id  RPM    capacity   IO_group_id  IO_group_name  tech_type  block_size  candidate_count  superior_count total_count
0   10000  300.9GB    0            io_group0      tier0_flash    512         30               3              30

A concise invocation example

lsdriveclass -delim ! -nohdr

The detailed resulting output:

0!10000!300.9GB!0!io_group0!tier_nearline!512!30!30
1!!600.5GB!0!io_group0!tier_nearline!512!10!50
2!15000!900.1GB!1!io_group1!tier_enterprise!512!60!60
3!15000!600.5GB!2!io_group2!tier_enterprise!4096!0!24

A detailed invocation example

lsdriveclass 2

The detailed resulting output:

id 2
RPM 15000   
capacity 900.1GB
IO_group_id 1
IO_group_name io_group1
tech_type tier0_flash
block_size 512
candidate_count 60
superior_count 5
total_count 60