A few issues today with a machine that had been left to boot with its swap space on the SAN. So I wanted to tell the machine to use the swap space on the local disk so I could refer to it in /etc/fstab by its label. So I tried:
e2label /dev/sdf3 SWAP-local
which didn’t work as e2label is specifically for ext2/ext3. So:
mkswap -L SWAP-local /dev/sdf3
Created the swap space and assigned the label. But I didn’t want to reboot until I was sure the correct swap space would be used so I checked with:
swapon LABEL=SWAP-local
Which informed me the device was busy – must have been started with the mkswap command! So I checked again with:
swapon -s
Which gives a summary of the swap being used and this showed my partition sdf3 being used. Happy days and a reboot showed things back to normal. For reference swapon -a will read from /etc/fstab for swap and the /etc/fstab now uses:
LABEL=SWAP-local swap swap defaults 0 0
