7.2 Viewing a List of Devices

You can use the nlvm list devices command to view information about each of the active devices on the system. For command usage information, see List Devices in the OES 2023: NLVM Reference.

The command returns the following information:

Parameter

Description

Sample Values

Device name

Displays the node name of the device in the /dev directory.

sde

Size

Displays the total amount of space on the device.

11.0GB

Free

Displays the amount of free unpartitioned space on the device.

0KB

199.50GB

Format

Displays the partitioning scheme used to format the device. MSDOS supports devices up to 2 TB in size. GPT supports devices of any size.

MSDOS

GPT

Shared

Displays whether the Shareable for Clustering setting is enabled or disabled. The Shareable for Clustering setting should be enabled for devices used in clustered NSS pools and for SBD partitions.

Yes, enabled

No, disabled

RAID

Displays whether the device is used as a segment in an NSS software RAID device.

Yes or No

If the more option is specified, the information returned for each device is the same as for the nlvm list device command.

  1. Log in to the server as the root user, then open a terminal console.

  2. View a list of active devices by entering

    nlvm list devices [more|all] [exclude=<raid|nonraid|shared|nonshared|lvm|nonlvm>]

    For example:

    nlvm list devices
 Name            Size     Used     Free   Format Shared RAID Enabled
 sda           11.00GB   9.29GB   1.70GB   MSDOS   No    No
 sdb          102.00MB 102.00MB      0KB   MSDOS  Yes    No
 sdc          102.00MB 102.00MB      0KB   MSDOS  Yes    No
 sdd          512.00MB      0KB      0KB    None   No    No
 sde          512.00MB      0KB      0KB    None   No    No
 clus1.sbd     99.57MB  99.57MB      0KB    None  Yes     1   Yes
    nlvm list devices more
 Name            Size     Used     Free   Format Shared RAID Sync  Maj:Min
 sda           11.00GB   9.29GB   1.70GB   MSDOS   No    No          8:0
 sdb          102.00MB 102.00MB      0KB   MSDOS  Yes    No          8:16
 sdc          102.00MB 102.00MB      0KB   MSDOS  Yes    No          8:32
 sdd          512.00MB      0KB      0KB    None   No    No          8:48
 sde          512.00MB      0KB      0KB    None   No    No          8:64
 clus1.sbd     99.57MB  99.57MB      0KB    None  Yes     1   Yes  253:0
    nlvm list devices all
 Name=sda
  Size=11.00GB(23068672) Used=9.29GB(19486720) Free=1.70GB(3581952)
  Format=MSDOS Shared=No RAID=No M:M=8:0 H:S=255:32
  Partitions on the device:
   Part Type                Size   Sectors  Pool
   sda1 Linux            297.00MB   608256  
   sda2 Linux Swap         1.00GB  2105344  
   sda3 Linux              7.99GB 16771072  

 Name=sdb
  Size=102.00MB(208896) Used=102.00MB(208896) Free=0KB(0)
  Format=MSDOS Shared=Yes RAID=No M:M=8:16 H:S=255:32
  Partitions on the device:
   Part          Type                Size  Sectors  Pool
   clus134.msbd0 Cluster           99.59MB  203968  

 Name=sdc
  Size=102.00MB(208896) Used=102.00MB(208896) Free=0KB(0)
  Format=MSDOS Shared=Yes RAID=No M:M=8:32 H:S=255:32
  Partitions on the device:
   Part          Type                Size  Sectors  Pool
   clus134.msbd1 Cluster           99.59MB  203968  

 Name=sdd
  Size=512.00MB(1048576) Used=512.00MB(1048576) Free=0KB(0)
  Format=MSDOS Shared=No RAID=No M:M=8:48 H:S=255:32
  Partitions on the device:
   Part Type                Size  Sectors  Pool
   sdd1 Linux LVM        509.98MB 1044448  

 Name=sde
  Size=512.00MB(1048576) Used=16KB(32) Free=511.98MB(1048544)
  Format=MSDOS Shared=No RAID=No M:M=8:64 H:S=255:32

 Name=sdf
  Size=512.00MB(1048576) Used=16KB(32) Free=511.98MB(1048544)
  Format=MSDOS Shared=No RAID=No M:M=8:80 H:S=255:32

 Name=sdg
  Size=716.00MB(1466368) Used=32KB(64) Free=715.95MB(1466271)
  Format=GPT Shared=No RAID=No M:M=8:96 H:S=255:32

 Name=clus134.sbd
  Size=99.57MB(203936) Used=99.57MB(203936) Free=0KB(0)
  Format=None Shared=Yes RAID=1 Sync=Yes M:M=253:0 H:S=255:32
  Segs=2 Enbl=Yes
  Segments of the RAID:
   Segment Name          Device     Size  Sectors  Sync
      0    clus134.msbd0 sdb      99.59MB  203968   Yes
      1    clus134.msbd1 sdc      99.59MB  203968   Yes