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

Create filesystems (SLES 12)

For 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, Lenovo DE_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, Lenovo DE_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,Lenovo DE_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