Create filesystems (RHEL 7 and SLES 12)

09/09/2021 Contributors

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

Steps

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

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

Create a folder to mount the new device.
```
# mkdir /mnt/ext4
```

Mount the device.

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

Create filesystems (RHEL 7 and SLES 12)

Creating your file...