Hello, backup harddisk connected via eSATA. Hard kernel hang, mouse pointer freezing two times seemingly after finishing /home backup and creating new snapshot on source BTRFS SSD RAID 1 for / in order to backup it. I did scrubbed / and it appears to be okay, but I didn´t run btrfs check on it. Anyway deleting that subvolume works and I as I suspected an issue with the backup disk I started with that one.
I got merkaba:~> btrfs --version btrfs-progs v4.9.1 merkaba:~> cat /proc/version Linux version 4.9.20-tp520-btrfstrim+ (martin@merkaba) (gcc version 6.3.0 20170321 (Debian 6.3.0-11) ) #6 SMP PREEMPT Mon Apr 3 11:42:17 CEST 2017 merkaba:~> btrfs fi sh feenwald Label: 'feenwald' uuid: […] Total devices 1 FS bytes used 1.26TiB devid 1 size 2.73TiB used 1.27TiB path /dev/sdc1 on Debian unstable on ThinkPad T520 connected via eSATA port on Minidock. I am now running btrfs check --repair on it after without --repair the command reported file extent discount errors and it appears to loop on the same file extent discount errors for ages. Any advice? I do have another backup harddisk with BTRFS that worked fine today, so I do not need to recover that drive immediately. I may let it run for a little more time, but then will abort the repair process as I really think its looping just over and over and over the same issues again. At some time I may just copy all the stuff that is on that harddisk, but not on the other one over to the other one and mkfs.btrfs the filesystem again, but I´d rather like to know whats happening here. Here is output: merkaba:~> btrfs check --repair /dev/sdc1 enabling repair mode Checking filesystem on /dev/sdc1 [… UUID ommited …] checking extents Fixed 0 roots. checking free space cache cache and super generation don't match, space cache will be invalidated checking fs roots root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 [… hours later …] root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 root 257 inode 4979842 errors 100, file extent discount Found file extent holes: start: 0, len: 78798848 root 257 inode 4980212 errors 100, file extent discount Found file extent holes: start: 0, len: 143360 root 257 inode 4980214 errors 100, file extent discount Found file extent holes: start: 0, len: 4227072 This basically seems to go on like this forever. Thanks, -- Martin -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html