Hi, (Resending as it looks like the first attempt didn't get through, probably too large, so logs are now in dropbox)
I have a btrfs volume which is raid1 across two spinning rust disks, each 2TB. When trying to access some files from a another machine using sshfs the server machine has crashed twice resulting in a hard lock up, i.e. power off required to restart the machine. There are no crash dumps in /var/log/syslog, or anything that looks like an associated error message to me, however on the second occasion I was able to see the following message flash up the console (in addition to some stack dumps): Fixing recursive fault, but reboot is needed I've ran btrfs scrub and btrfsck on the drives, with the output included below. Based on what I've found on the web, I assume that a btrfs-zero-log is required. * Is this the recommended path? * Is there a way to find out which files will be affected by the loss of the transactions? I do have a backup of the drive (which I believe is completely up to date, the btrfs volume is used for archiving media and documents, and single person use of git repositories, i.e. only very light writing and reading). Some basic details: OS: Ubuntu 15.10 Kernel: Ubuntu 4.2.0-19-generic (which is based on mainline 4.2.6) > sudo btrfs fi df /srv/d2root ============================== Data, RAID1: total=250.00GiB, used=248.86GiB Data, single: total=8.00MiB, used=0.00B System, RAID1: total=8.00MiB, used=64.00KiB System, single: total=4.00MiB, used=0.00B Metadata, RAID1: total=1.00GiB, used=466.77MiB Metadata, single: total=8.00MiB, used=0.00B GlobalReserve, single: total=160.00MiB, used=0.00B > sudo btrfs fi usage /srv/d2root ================================= Overall: Device size: 3.64TiB Device allocated: 502.04GiB Device unallocated: 3.15TiB Device missing: 0.00B Used: 498.62GiB Free (estimated): 1.58TiB (min: 1.58TiB) Data ratio: 2.00 Metadata ratio: 1.99 Global reserve: 160.00MiB (used: 0.00B) Data,single: Size:8.00MiB, Used:0.00B /dev/sdc 8.00MiB Data,RAID1: Size:250.00GiB, Used:248.86GiB /dev/sdb 250.00GiB /dev/sdc 250.00GiB Metadata,single: Size:8.00MiB, Used:0.00B /dev/sdc 8.00MiB Metadata,RAID1: Size:1.00GiB, Used:466.77MiB /dev/sdb 1.00GiB /dev/sdc 1.00GiB System,single: Size:4.00MiB, Used:0.00B /dev/sdc 4.00MiB System,RAID1: Size:8.00MiB, Used:64.00KiB /dev/sdb 8.00MiB /dev/sdc 8.00MiB Unallocated: /dev/sdb 1.57TiB /dev/sdc 1.57TiB btrfs scrub output: https://www.dropbox.com/s/blqvopa1lhkghe5/scrub.log?dl=0 btrfsck sdb output: https://www.dropbox.com/s/hw6w6cupuu1rny4/btrfsck.sdb.log?dl=0 btrfsck sdc output: https://www.dropbox.com/s/mijz492mjr76p8z/btrfsck.sdc.log?dl=0 Thanks very much, Alistair -- 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