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Storage Management

Storage Management

Standard File Systems

  • Partitioning

  • fdisk/gdisk /dev/drive

    • Allows us to create a partition from the available indicated disk
    • Can set type of partition (GPT or MBT depending on use), list the partition types in the menu

  • Format the filesystem partition created:

  • mkfs -t ext4 /dev/disk1
  • Formats the disk partition disk1 as an ext4 partition
  • Mount the formatted partition:
  • mkdir /mnt/mount

  • mount -t ext4 /dev/disk1 /mnt/mount

    • Mounts the formatted drive, as an ext4 mount on the created directory

  • Persistently mounting the disk above

  • Obtain the UUID of the device:
    • ls -al /dev/disk/by-uuid

  • Add entry to /etc/fstab: UUID=UUDI_OBTAINED /mnt/mount ext4 defaults 0

  • Mount the defined entry automatically, if not mounted in current session:

    • mount -a
    • This will scan all defined mount points, and if not mounted, mount them using the definitions in /etc/fstab

Encrypted File Systems

  • System support encrypted file system query:
  • grep -I config_dm_crypt /boot/config-$(uname -r)
  • Determine if module is loaded:
  • lsmod | grep dm_crypt
  • Load module if needed:
  • modprobe dm_crypt
  • Partitioning : Handled the same way as a typical disk and drive as defined above in the “Standard File Systems” section
  • Install the cryptsetup utility:
  • yum install cryptsetup
  • Default encryption key setup
  • Luks – Linux Unified Key Setup
  • Set up the partitions with passphrase:
  • cryptsetup -y luksformat /dev/disk1
    • Prompts for passphrase for unencrypting drive during mount/use
    • Large drives will take a long time to encrypt
  • Open partition for use:
  • cryptsetup luksOpen /dev/disk1 reference_name
  • Format the filesystem partition created, using the mapper overlay created above
  • Handled the same way as a typical disk and drive as defined above in the “Standard File Systems” section
    • Example: mkfs-t ext4 /dev/mapper/reference_name
  • Mount the drive:
  • mount /dev/mapper/reference_name /mnt/mount
  • Close the partition once used and unmounted:
  • cryptsetup luksClose reference_name