How to check the filesystem type of a logical volume?
This is useful for determining the filesystem types of the data in raw disk partitions, which are block special files. This option also causes file to disregard the file size as reported by stat (2) since on some systems it reports a zero size for raw disk partitions. Use lsblk -f.
How to change UUID of logical LVM partitions?
how to change uuid of lvm partition: create a rescue vm (same CentOS version your vm is running/template, that used to work fine/tested) power down the vm with the broken filesystem clone the broken vm and name it “vmname-broken” (so you will get one consistent vdi virtualbox harddisk file, remove all the snapsnots)
How to change the UUID on a XFS file system?
Finallly, we can start digging into the content of the device mount on /mnt and do whatever was required. Perhaps, one note if this device will be moved back to the original EC2 instance do not forget to updat the /mnt/etc/fstab file with the updated UUID of this modified boot device.
Do you need to change the UUID of the boot device?
However, in case the volume is the boot device then the UUID is usually the same on the other EC2 instance so we need to change the UUID before we can mount it. In the next output you can see for yourself that the UUID of device /dev/nvme0n1p2 is the same of device /dev/nvme4n1p2:
How to move logical volumes from one disk?
Calling ioctl () to re-read partition table. Syncing disks. Physical volume “/dev/sdc1” successfully created. Logical volume rhel/lv1 successfully converted. Logical volume rhel/lv1 successfully converted. Everything looks perfect..
Is it OK to use-L on a regular file?
BTW, it’s OK to use -L on a regular file. Alternatively, you could run blkid /dev/vg1/lv1. That would report something like: Normally, file only attempts to read and determine the type of argument files which stat (2) reports are ordinary files.