Ubuntu_mount_disk.md

Mount New Disk to Ubuntu 18.04

• Check the attached disks by using below command, verify the space df -h

Filesystem      Size  Used Avail Use% Mounted on
udev            491M     0  491M   0% /dev
tmpfs           103M  771k  102M   1% /run
/dev/xvda1      8.3G  1.2G  7.1G  15% /
tmpfs           514M     0  514M   0% /dev/shm
tmpfs           5.3M     0  5.3M   0% /run/lock
tmpfs           514M     0  514M   0% /sys/fs/cgroup
/dev/loop0      102M  102M     0 100% /snap/core/9289
/dev/loop1       19M   19M     0 100% /snap/amazon-ssm-agent/1566
tmpfs           103M     0  103M   0% /run/user/1000

• Run the below to list all the available disks sudo fdisk -l

Disk /dev/loop0: 97 MiB, 101724160 bytes, 198680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop1: 18 MiB, 18857984 bytes, 36832 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/xvda: 8 GiB, 8589934592 bytes, 16777216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xb93804ca

Device     Boot Start      End  Sectors Size Id Type
/dev/xvda1 *     2048 16777182 16775135   8G 83 Linux


Disk /dev/xvdb: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

In the above /dev/xvdb is not used.

• Run the below to make the drive ready sudo mkfs.ext4 /dev/xvdb

• Create directory to mount sudo mkdir -p /var/data

• Mount the disk sudo mount /dev/xvdb /var/data

To keep the disk mounted upon reboot

• Add the entry to filesystem table (fstab) Example: /dev/xvdb /var/data ext4 errors=remount-ro 0 2

/dev/xvdb is our disk.

/var/data is the folder we mount to attach or ‘mount’ the drive to – called a mountpoint.

ext4 is the file system we chose for the drive.

errors=remount-ro means if any disk errors are detected the file system will be mounted as read-only

0 or the fifth parameter is called the fs_freq and is used to determine which files need to be dumpted. 0 signified no dump required.

1 or the sixth paramter is called the fs_passno and is used to determin the in file system checkers are carried out at boot time.

• Add the above line in fstab file sudo vim /etc/fstab