Solution for pvcreate error: Device /dev/xyz not found (or ignored by filtering). Troubleshooting steps and resolution for this error.
Sometimes when adding new disk/LUN to Linux machine using pvcreate you may come across below error :
Device /dev/xyz not found (or ignored by filtering).
# pvcreate /dev/sdb Device /dev/sdb not found (or ignored by filtering).
This is due to disk was used in different volume managers (possibly Linux own
fdisk manager) and now you are trying to use it in LVM. To resolve this error, first, check if it has
fdisk partitions using
fdisk command :
# fdisk /dev/sdb WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p Disk /dev/sdb: 859.0 GB, 858993459200 bytes 255 heads, 63 sectors/track, 104433 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x62346fee6 Device Boot Start End Blocks Id System /dev/sdb1 1 104433 838858041 83 Linux
In the above example, you can print the current partition table of the disk using
p option under
You can see there is one primary partition detected using
fdisk. Because of this LVM command to initialize this disk (
To resolve this you need to remove this partition and re-initialize disk in LVM. To delete partition use
d option under
# fdisk /dev/sdb WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help):d Selected partition 1 Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
After issuing delete
d command under
fdisk menu, you need to write (w) changes on disk. This will remove your existing partition on the disk. Once again you can use print
p option to make sure that there is no
fdisk partition on the disk.
You can now use disk in LVM without any issue.
# pvcreate /dev/sdb Physical volume "/dev/sdb" successfully created
If this solution doesn’t work for you or there were no partitions on disk previously and still, if you get this error then you may want to look at your multipath configurations. The hint is to look at your verbose
pvcreate output to check where it’s failing. Use
pvcreate -vvv /dev/<name> command.
i have done the same but the pvcreate is still showing the same error
Device /dev/sdb not found (or ignored by filtering).
Shrikant Lavhate says
Look at the last para of this article. verbose output of command and multipathing are two areas you need to explore.