Why can't I mount my Amazon EBS volume?

Resolution

When you're mounting your Amazon EBS volume, you can get this error because of a UUID conflict issue with the XFS file system.

Check if it's a UUID conflict issue

To determine if it's a UUID conflict issue, complete the following steps:

1.    Run the blkid command to check the UUID of the file system:

root@:~# blkid
/dev/nvme0n1p1: LABEL="cloudimg-rootfs" UUID="ce780dbf-6f70-412d-87dd-61654730a231" TYPE="ext4" PARTUUID="bf0d338c-01"
.......
/dev/nvme1n1: UUID="2ddd89c4-415a-4aee-8431-abecdd8c79b8" TYPE="xfs"
/dev/nvme2n1: UUID="2ddd89c4-415a-4aee-8431-abecdd8c79b8" TYPE="xfs"

2.    Check the Linux kernel ring buffer to confirm that it's a UUID conflict issue.

root@:~# blkid
..........
[ 5444.389157] XFS (nvme2n1): Filesystem has duplicate UUID 2ddd89c4-415a-4aee-8431-abecdd8c79b8 - can't mount

Ignore the UUID check, or change the UUID of one of the file systems

If you don't want to change either of the file systems, then you can use the nouuid option to ignore the UUID check:

root@:~# mount -o nouuid /dev/nvme2n1  /lv2

root@:~# df -h |grep lv2
/dev/nvme2n1   1014M   40M  975M   4% /lv2

Or, you can change the UUID of one of the file systems:

root@:~# xfs_admin -U generate /dev/nvme2n1
Clearing log and setting UUID
writing all SBs
new UUID = 02f8750a-c482-4ed1-949c-4088f2ecc04a
root@:~#  blkid
/dev/nvme0n1p1: LABEL="cloudimg-rootfs" UUID="ce780dbf-6f70-412d-87dd-61654730a231"
        TYPE="ext4" PARTUUID="bf0d338c-01"
/dev/nvme1n1: UUID="2ddd89c4-415a-4aee-8431-abecdd8c79b8" TYPE="xfs"
/dev/nvme2n1: UUID="02f8750a-c482-4ed1-949c-4088f2ecc04a" TYPE="xfs"
root@:~# mount /dev/nvme2n1 /lv2