2025年08月08日
destructive method to swap files in a partition
today I realized that i fucked up my cachyos install. my root partition uses 512G space while my home partition uses 128G. plus i was on XFS file system… yikes indeed.
welp what i need to do is just back my files up to another storage and restore them. luckily i had enough storage for that otherwise i am doomed…
# rsync --archive --numeric-ids --hard-links --sparse --human-readable --progress --acls --xattrs --verbose /mnt/home/ /isekai/backup_home/ 2> /isekai/rsync_home_errors.log # rsync --archive --numeric-ids --hard-links --sparse --human-readable --progress --acls --xattrs --verbose /mnt/ /isekai/backup_root/ 2> /isekai/rsync_root_errors.log
i fucked up once again by not adding --numeric-ids to rsync but luckily i was still able to boot.
otherwise i’d be fixing the uids
then I deleted the volume groups. i forgot the commands though
then i recreated them. but it’ll ask you to wipe an existing XFS partition, it’ll be fine since that’s wasn’t my backup partition.
i noticed that my usage of the / partition was quite small so i adjust it to 80GiB instead. gave free space to my home partition as well.
then i restored the back up thru rsync.
next was fix /etc/fstab to point to the UUIDS (use blkid) of my partitions.
fixed the systemd-boot of /boot to point to proper UUIDS again.
unmounted it liveusb.
and i am done.
success!