Hi Chao. Good news!
It appears that by some miracle, @uplinkr managed to dodge all odds: 1. gparted did not perform shrink as they didn't write the fool-proof shrink size calculation code yet 2. The new location within the partition table did not overlap with the old partition 3. The faulty fsck run did not touch the old partition's area We managed to get the older partition's location via testdisk (which looks for f2fs magic code) and restore the entire partition. I insisted that he use this opportunity to reproduce the issue in a safe fashion, communicate with upstream and make sure no one else has to go through the same thing (after a full backup, obviously). I'll walk him through setting up a dm-snapshot and gather the initial/proper resize, mount, fsck log after the backup. One thing to note here is that he said that the utilization was very full: only 8G left. Maybe this is the corner case that we need to look out for? Thanks, On Thu, Apr 10, 2025 at 12:17 AM Chao Yu <c...@kernel.org> wrote: > > On 4/10/25 14:19, upli...@airmail.cc wrote: > > On 2025-04-10 08:52, Chao Yu wrote: > >> I checked the log, I guess it actually seems pretty bad... I guess we > >> need to find out those file which has not been migrated correctly, and > >> try to correct them, may be w/ a new tool. > > > > Hello, > > > > The issue is the corrupt partition in question contains a lot of > > unbackupped, valuable data for me. I wasn't aware or informed of the > > potential issues resizing on F2FS has (the ArchWiki listed none) > > and as such recovery of this partition is a lifeline for me. > > Sorry about this, we should give a explicit caution about resize tool > use. > > But still I didn't get why we can run into this situation, since as you > said, resize went through successfully. Could you please provide more > details about process of resize? Parameters for resize? Logs you kept > during resize? etc. > > > > > Could you please write this tool or a patch that I can try in fsck? > > I will try my best. > > > > > Thanks. > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
