Uly.me

cloud engineer

Linux Format USB Drive

Here’s how to format a USB drive on Linux.

Plug in the USB drive to see mount point.

# scan for all drives
df -Th
Filesystem     Type     Size  Used Avail Use% Mounted on
/dev/sdc1      fuseblk   30G   66M   30G   1% /media/ulysses/451B99AF225B48EC

Unmount USB drive.

umount /dev/sdc1

Choose a file system type and run the appropriate format command.

# nfts format
mkfs.ntfs /dev/sdc1
# vfat format
mkfs.vfat /dev/sdc1
# ext4 format
mkfs.ext4 /dev/sdc1

AWS XFS Volume Setup

Here’s how to setup a XFS volume.

file -s /dev/nvme2n1
mkfs -t xfs /dev/nvme2n1

Mount to /data.

mkdir /data
mount /dev/nvme2n1 /data

Add to /etc/fstab.

vim /etc/fstab
#
#
UUID=xxxxxxxxxxxxxxxxxxxxxx /data  xfs  defaults 0 0

AWS EFS /etc/fstab

To automatically mount a EFS volume after each reboot, you’ll need to add the following format to /etc/fstab.

You can use the DNS name given by AWS.

fs-12345678:/ /mnt/efs efs defaults,_netdev 0 0

Or the IP address.

10.0.0.22:/ /mnt/efs efs defaults,_netdev 0 0

Mount all with fake and verbose.

mount -fav

AWS EFS Describe Mount Targets

Here’s how to display mount targets of an EFS system via AWS CLI.

 aws efs describe-mount-targets \
--file-system-id fs-xxxxxxxx \
--profile default \
--region us-east-1

XFS Filesystem has duplicate UUID

Here’s how to fix a duplicate UUID on a XFS file system. 

mount -o rw,nouuid /dev/sda1  /data

Mounting with nouuid will work, but not after a reboot.

To avoid a duplicate ID, run this command to generate a new UUID.

xfs_admin -U generate /dev/sda3
Clearing log and setting UUID
writing all SBs
new UUID = xxxxx-xxxx-xxxx-xxxxxxxxx