I have accidentally mounted 20GB disk under /usr. Due to which i'm unable to boot or even not able to enter single user mode. Is there any way?

Question

I have accidentally mounted 20GB disk under /usr. Due to which i'm unable to boot or even not able to enter single user mode. Is there any way?

Even I have removed the disk No 2 under VMware console. But still I'm unable to boot.

Answer 1

Boot into the rescue mode with the boot option rd.break=initqueue.

Run the following commands to initiate the volume manager and mount the system root

pvscan all
vgscan all
lvscan all
mkdir foo
mount -t xfs /dev/mapper/rootvg foo
vi foo/etc/fstab

Delete the entries of /usr mount point; save & Quit;

exit; reboot;

That is it. Now os loads successfully.