Create partitions and filesystems

You can create a partition on the multipath device, optionally create a file system on the namespace, and mount the partition.

Steps

  1. Run the multipath -ll command to get a list of/dev/mapper/dm devices.
    # multipath -ll

    The result of this command shows two devices, dm-19 and dm-16 :

    eui.00001ffe5a94ff8500a0980000af4444 dm-19 NVME,NetApp E-Series
    size=10G features='1 queue_if_no_path' hwhandler='0' wp=rw
    |-+- policy='service-time 0' prio=50 status=active
    | |- #:#:#:# nvme0n19 259:19  active ready running
    | `- #:#:#:# nvme1n19 259:115 active ready running
    `-+- policy='service-time 0' prio=10 status=enabled
      |- #:#:#:# nvme2n19 259:51  active ready running
      `- #:#:#:# nvme3n19 259:83  active ready running
    eui.00001fd25a94fef000a0980000af4444 dm-16 NVME,NetApp E-Series
    size=16G features='1 queue_if_no_path' hwhandler='0' wp=rw
    |-+- policy='service-time 0' prio=50 status=active
    | |- #:#:#:# nvme0n16 259:16  active ready running
    | `- #:#:#:# nvme1n16 259:112 active ready running
    `-+- policy='service-time 0' prio=10 status=enabled
      |- #:#:#:# nvme2n16 259:48  active ready running
      `- #:#:#:# nvme3n16 259:80  active ready running
  2. Create a file system on the partition for each /dev/mapper/dm device.
    The method for creating a file system varies depending on the file system chosen. This example shows creating an ext4 file system.
    Example
    # mkfs.ext4 /dev/mapper/dm-19
    mke2fs 1.42.11 (09-Jul-2014)
    Creating filesystem with 2620928 4k blocks and 655360 inodes
    Filesystem UUID: 97f987e9-47b8-47f7-b434-bf3ebbe826d0
    Superblock backups stored on blocks:
            32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
    
    Allocating group tables: done
    Writing inode tables: done
    Creating journal (32768 blocks): done
    Writing superblocks and filesystem accounting information: done
    
    
  3. Create a folder to mount the new partition.
    Example
    # mkdir /mnt/ext4
    
  4. Mount the partition.
    Example
    # mount /dev/mapper/dm-19 /mnt/ext4