Create filesystems

Contributors NetAppZacharyWambold netapp-driley

You can create a file system on the namespace or native NVMe device and mount the filesystem.

Create filesystems (RHEL 7 and SLES 12)

For RHEL 7 and SLES 12, you create a file system on the desired dm device and mount the filesystem.

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/eui- device.

    The method for creating a file system varies depending on the file system chosen. This example shows creating an ext4 file system.

    # 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 device.

    # mkdir /mnt/ext4
  4. Mount the device.

    # mount /dev/mapper/eui.00001ffe5a94ff8500a0980000af4444 /mnt/ext4

Create filesystems (RHEL 8 and SLES 15)

For RHEL 8 and SLES 15, you create a filesystem on the native nvme device and mount the filesystem.

Steps
  1. Run the multipath -ll command to get a list of /dev/nvme devices.

    # multipath -ll

    The result of this command shows device nvme0n6.

    eui.000082dd5c05d39300a0980000a52225 [nvme]:nvme0n6 NVMe,NetApp E-Series,08520000
    size=4194304 features='n/a' hwhandler='ANA' wp=rw
    |-+- policy='n/a' prio=50 status=optimized
    | `- 0:0:1 nvme0c0n1 0:0 n/a optimized     live
    |-+- policy='n/a' prio=50 status=optimized
    | `- 0:1:1 nvme0c1n1 0:0 n/a optimized     live
    |-+- policy='n/a' prio=10 status=non-optimized
    | `- 0:2:1 nvme0c2n1 0:0 n/a non-optimized live
    `-+- policy='n/a' prio=10 status=non-optimized
      `- 0:3:1 nvme0c3n1 0:0 n/a non-optimized live
  2. Create a file system on the partition for each /dev/nvme0n# device.

    The method for creating a file system varies depending on the file system chosen. This example shows creating an ext4 file system.

    # mkfs.ext4 /dev/disk/by-id/nvme-eui.000082dd5c05d39300a0980000a52225
    mke2fs 1.42.11 (22-Oct-2019)
    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 device.

    # mkdir /mnt/ext4
  4. Mount the device.

    # mount /dev/disk/by-id/nvme-eui.000082dd5c05d39300a0980000a52225 /mnt/ext4