Ok, here's what's happening. A few years ago, I took my old WD green drives and put them in a box as backups to a new array of Seagate drives. When one of those seagate drives failed (just out of warranty, of course), I replaced it with one of the WD's. That was cooking along just fine until just a few days ago when it started throwing bad sectors and for some reason caused btrfs to have lots of problems with the system block on the other three drives. I tried to add the other spare and remove the old spare, but for whatever reason, this second spare (which had been fine when I boxed it in an anti-static bag), is now failing catastrophically. Now that that has happened, the btrfs volume is stuck in a funny state where it won't mount in degraded mode, because it thinks there should be five devices, but there are only the original three.
I'm going to go ahead and order a new drive. Meanwhile, is there a way to add and remove drives from volumes that can't be mounted? On Wed, Aug 12, 2015 at 4:48 PM, Timothy Normand Miller <theo...@gmail.com> wrote: > Actually, it didn't resume. The "btrfs delete missing" was using 100% > of the I/O bandwidth but wasn't actually doing any disk reads of > writes. I tried to reboot, but the system wouldn't go down, so after > waiting 10 minutes, I power-cycled. Now I can't mount at all and > here's what dmesg says about that: > > [ 236.118419] BTRFS info (device sdb): allowing degraded mounts > [ 236.118421] BTRFS info (device sdb): disk space caching is enabled > [ 236.165470] BTRFS: bdev (null) errs: wr 1724, rd 305, flush 45, > corrupt 0, gen 2 > [ 245.883595] BTRFS: too many missing devices, writeable mount is not allowed > [ 245.946570] BTRFS: open_ctree failed > > It thinks now that there should be five devices, and since there are > only three available, it won't let me mount. > > # btrfs filesystem show > Label: none uuid: 49ac9ad2-b529-4e6e-aef9-1c5b9e8a72f8 > Total devices 1 FS bytes used 28.26GiB > devid 1 size 79.69GiB used 41.03GiB path /dev/sda3 > > warning, device 1 is missing > warning, device 1 is missing > warning devid 1 not found already > warning devid 5 not found already > Label: none uuid: ecdff84d-b4a2-4286-a1c1-cd7e5396901c > Total devices 5 FS bytes used 1.46TiB > devid 2 size 931.51GiB used 767.00GiB path /dev/sdd > devid 3 size 931.51GiB used 745.03GiB path /dev/sdc > devid 4 size 931.51GiB used 767.00GiB path /dev/sdb > *** Some devices missing > > btrfs-progs v4.1.2 > > > > On Wed, Aug 12, 2015 at 4:27 PM, Timothy Normand Miller > <theo...@gmail.com> wrote: >> It resumed on its own. Weird. >> >> On Wed, Aug 12, 2015 at 4:23 PM, Timothy Normand Miller >> <theo...@gmail.com> wrote: >>> On Wed, Aug 12, 2015 at 2:10 PM, Chris Murphy <li...@colorremedies.com> >>> wrote: >>> >>>> >>>> Anyway it looks like it's hardware related, but I don't know what >>>> device ata4.00 is, so maybe this helps: >>>> http://superuser.com/questions/617192/mapping-ata-device-number-to-logical-device-name >>> >>> # ata=4; ls -l /sys/block/sd* | grep $(grep $ata >>> /sys/class/scsi_host/host*/unique_id | awk -F'/' '{print $5}') >>> lrwxrwxrwx 1 root root 0 Aug 12 16:21 /sys/block/sde -> >>> ../devices/pci0000:00/0000:00:1f.5/ata4/host3/target3:0:0/3:0:0:0/block/sde >>> >>> sde is the newly attached drive, replacing the one that had appeared >>> to have bad sectors. So it looks like either this new motherboard has >>> a bad connector, or the cable is bad. I'm going to swap it out for a >>> different SATA cable. How do I resume the failed operation? And >>> should I reboot because of the OOPSes? >>> >>> -- >>> Timothy Normand Miller, PhD >>> Assistant Professor of Computer Science, Binghamton University >>> http://www.cs.binghamton.edu/~millerti/ >>> Open Graphics Project >> >> >> >> -- >> Timothy Normand Miller, PhD >> Assistant Professor of Computer Science, Binghamton University >> http://www.cs.binghamton.edu/~millerti/ >> Open Graphics Project > > > > -- > Timothy Normand Miller, PhD > Assistant Professor of Computer Science, Binghamton University > http://www.cs.binghamton.edu/~millerti/ > Open Graphics Project -- 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
