On Mon, Aug 10, 2015 at 6:52 PM, Chris Murphy <li...@colorremedies.com> wrote: > Four needed things: > - kernel version
4.1.0-gentoo-r1, although I have also tried 4.1.4. > - btrfs-progs version 4.1.2 > - complete dmesg for the failed mount It really doesn't say much. I have things like this: [ 8.643535] BTRFS info (device sdc): disk space caching is enabled [ 8.643789] BTRFS: failed to read the system array on sdc [ 8.706062] BTRFS: open_ctree failed [ 8.707124] BTRFS info (device sdc): disk space caching is enabled [ 8.710924] BTRFS: failed to read the system array on sdc [ 8.766080] BTRFS: open_ctree failed [ 8.766903] BTRFS info (device sdc): setting nodatacow, compression disabled [ 8.766905] BTRFS info (device sdc): disk space caching is enabled [ 8.767152] BTRFS: failed to read the system array on sdc [ 8.936019] BTRFS: open_ctree failed [ 8.936906] BTRFS info (device sdc): disk space caching is enabled [ 8.939922] BTRFS: failed to read the system array on sdc [ 8.995984] BTRFS: open_ctree failed [ 8.996796] BTRFS info (device sdc): disk space caching is enabled [ 8.997093] BTRFS: failed to read the system array on sdc [ 9.125936] BTRFS: open_ctree failed Also, when I manually try to mount, I get things like this: # mount /mnt/btrfs mount: wrong fs type, bad option, bad superblock on /dev/sdc, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. For this fstab entry: UUID=ecdff84d-b4a2-4286-a1c1-cd7e5396901c /mnt/btrfs btrfs compress=lzo,noatime,space_cache 0 2 # mount -t btrfs /dev/sdd /mnt/btrfs mount: wrong fs type, bad option, bad superblock on /dev/sdd, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so. > - complete btrfs check output (you mostly have this but since the > version isn't included, it's not clear this is the entire output) I pasted it all. > > The last two can be included as attachments in a bugzilla.kernel.org > bug report and the URL posted in this thread. Typically MUA wrapping > nerfs the dmesg making it hard to read, so attachments to a bug report > are better. Well, if I get something lengthy, I'll attach it to my bug report. Did the information I reported help at all? I think that btrfs just isn't being informative about the problem. Are there other commands I can run to get more detailed reports? BTW, I tried disconnecting the drive with the bad sector. I still get all the same errors and can't repair. > > Bugs get reported both in bugzilla and on the list. > https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#How_do_I_report_bugs_and_issues.3F > > Sometimes it takes a while for devs to respond, they also get worked > on even without responses just because there's so many improvements > each release. > > > -- > Chris Murphy > -- > 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 -- Timothy Normand Miller, PhD Assistant Professor of Computer Science, Binghamton University http://www.cs.binghamton.edu/~millerti/ Open Graphics Project -- 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