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Now, for very unexpected things and bad corruption, obviously you have backups right?but if you'd like to know what was corrupted and whether a restore from backup recovery is needed, or recover new data since your last backup, read on.
In real life, due to how btrfs is layed out, it's not succeptible to corruption issues or things that are out of sync between locations like ext2-3-4 are, so you'll find that in normal operation you would need fsck for ext2/3/4 to clean up a few things from time to time, but this is just not needed with btrfs.
Maybe a log file that tells how may boots are left, which could be grepped? /bin/bash # this directory must exist to execute the script if [ -d /dev/disk/by-id/ ]; then :; else echo 'ERROR: /dev/disk/by-id/ does not exist'; exit 1; fi # root user is necessary if [ $UID -gt 0 ]; then echo 'ERROR: You have to be root'; exit 1; fi # list ALL partitions and exclude the SWAP ones declare -a SWAPS=( $(cat /proc/swaps | grep /dev/ | awk '') ) ls Parts="ls -l /dev/disk/by-id/ | grep --regexp=-part[0-9] | awk ''" declare -a PARTITIONS=(`eval $ls Parts`) # format TEMP file for i in $(seq 0 $(($ - 1))); do PARTITION=$ if [ -n $PARTITION ]; then # first line, device name echo $PARTITION $$ fi done # show and delete TEMP file clear cat $$ rm -f $$ # TUNE help echo echo 'HOWTO' echo -e "- Change Filesystem volume name:\n\tsudo tune2fs -L New Label /dev/hda1\n\tsudo e2label /dev/hda1 New Label" echo echo -e "- Change Maximum mount count:\n\tsudo tune2fs -c 50 /dev/hda1" echo echo -e "- Modify reserved space:\n\tsudo tune2fs -m 1 /dev/hda1" echo exit 0Hi, Nearly all Ubuntu users know, that every 30 boots their system performs what is know as an "fsck" to make sure your hard drive has no errors.
With init, skipping a scheduled fsck during boot was easy, you just pressed Ctrl c, it was obvious! I got home, turned on my computer, and systemd decided it was time to run fsck on my 1TB hard drive. Well, Ctrl c does not work, ESC does not work, nothing seems to work. So, is there a mysterious set of commands they came up with to skip an fsck or is it yet another flaw?
Maybe a log file that tells how may boots are left, which could be grepped?
Short of turning it off completely (not recommended) it's still going to happen by surprise and on the computer's timetable.