Btrfs can't read superblock

Devon_Warren · July 10, 2017, 2:14am

One of my subvolumes stopped mounting and after trying a bunch of different things I’ve hit a point where I’m not sure what else to try.

The subvolume “Movies” still shows up in the subvolume list but when I try to mount it I get “can’t read superblock”. I have run btrfs scrub, balance, zero-log, chunk-recover, super-recover and btrfsck --repair which keeps saying “incorrect offsets 10488 10520”

For reference I have 4x 4TB in a raid10 btrfs configuration running Rockstor 3.9.0-16. Any suggestions would be appreciated. More info below.

[root@nas ~]# ls /mnt2/data/Movies
ls: cannot access /mnt2/data/Movies: Input/output error
[root@nas ~]# mount -t btrfs -o subvol=Movies,recovery,nospace_cache,clear_cache /dev/sde /mnt2/data/Movies
mount: /dev/sde: can’t read superblock
[root@nas ~]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,size=8029856k,nr_inodes=2007464,mode=755)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/sdd3 on / type btrfs (rw,noatime,ssd,space_cache,subvolid=258,subvol=/root)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=34,pgrp=1,timeout=300,minproto=5,maxproto=5,direct,pipe_ino=15334)
mqueue on /dev/mqueue type mqueue (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
tmpfs on /tmp type tmpfs (rw)
/dev/sdd3 on /home type btrfs (rw,noatime,ssd,space_cache,subvolid=257,subvol=/home)
/dev/sdd1 on /boot type ext4 (rw,noatime,data=ordered)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
/dev/sdd3 on /mnt2/rockstor_rockstor type btrfs (rw,relatime,ssd,space_cache,subvolid=5,subvol=/)
/dev/sda on /mnt2/data type btrfs (ro,relatime,nospace_cache,subvolid=5,subvol=/)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=1608216k,mode=700)
[root@nas ~]# btrfs filesystem show data
Label: ‘data’ uuid: 9ebe2f54-f322-4f2b-847c-d245b3593486
Total devices 4 FS bytes used 672.00KiB
devid 1 size 3.64TiB used 2.14TiB path /dev/sda
devid 2 size 3.64TiB used 2.14TiB path /dev/sdb
devid 3 size 3.64TiB used 2.14TiB path /dev/sdc
devid 4 size 3.64TiB used 2.14TiB path /dev/sde

[root@nas ~]# btrfs subvolume list /mnt2/data/
ID 258 gen 543698 top level 5 path Movies
ID 259 gen 544414 top level 5 path TV_Shows
ID 260 gen 543662 top level 5 path Share
ID 1832 gen 369265 top level 5 path Backup
ID 1833 gen 544322 top level 5 path Misc
ID 7963 gen 369429 top level 5 path Code
ID 11592 gen 369429 top level 5 path Addons
ID 11593 gen 369429 top level 11592 path Addons/btrfs/subvolumes/e1cb63aa63e63728c561af75a5fdf97323d89d9c3130c0ffc59e6c98529ce4bf
ID 11594 gen 369429 top level 11592 path Addons/btrfs/subvolumes/3a4ac39acdc9516332f99f28925f1721a0be0d8f544fc36fcc7dd77a99d40b87
ID 11595 gen 369429 top level 11592 path Addons/btrfs/subvolumes/f2e71848528926e78abc8d04b9f0d0a7d5d8725022d737abb3cd900366a67051
ID 11596 gen 369429 top level 11592 path Addons/btrfs/subvolumes/4c4dddd4ee846363daec7bb80925e0a00150ec704e29a061d2a6704300af43c2
ID 11597 gen 369429 top level 11592 path Addons/btrfs/subvolumes/1fd0c7c1f4a6546a4ac267a7e31342aac4ad040c902d8549426e0b1fc2903215
ID 11598 gen 369429 top level 11592 path Addons/btrfs/subvolumes/4ed1badc0ba368a5d44873fb8fdc9c36204dab6ad417089bdc8116657ef07bd3
ID 11599 gen 369429 top level 11592 path Addons/btrfs/subvolumes/2e99eef960f44b60342a4ecddbc443e0f22d1abf552132cc15bb248ae278af55
ID 11600 gen 369429 top level 11592 path Addons/btrfs/subvolumes/fee9ee72919171751405f04e62802432b447132b5b8c3dc439c6cabfa014820a
ID 11601 gen 369429 top level 11592 path Addons/btrfs/subvolumes/31434584137a059a2222bffa40bae1dfd1e780797ccf8a06ed32e442ee0025b7
ID 11602 gen 369429 top level 11592 path Addons/btrfs/subvolumes/b6583366ffa3986770c5f35a12dfc0cb76b97e6c38dd5e27c25225b77798db6c
ID 11603 gen 369429 top level 11592 path Addons/btrfs/subvolumes/4299a06a8a61662625d5f990202eb1c95f3dab14409384c98ebfc4e19ec84866
ID 11604 gen 369429 top level 11592 path Addons/btrfs/subvolumes/40211c515ddcc8261f382a415598ba5a42e6cef2855146eeda9af3a94ef5a64b
ID 11605 gen 369429 top level 11592 path Addons/btrfs/subvolumes/de66163e82e96183624a26ef148f1b054af2aad6c449bb8cd7f7227a38bcee66
ID 11606 gen 369429 top level 11592 path Addons/btrfs/subvolumes/41d069c2038ae0147b4c760a6222f481fe7e3d977553d346592375b3247d3232
ID 11607 gen 369429 top level 11592 path Addons/btrfs/subvolumes/e4074616817c6eec99a907f109dd4e57ed35d8b75ff22aa686ce844fdb02aae4
ID 11612 gen 369411 top level 11592 path Addons/btrfs/subvolumes/4b51ded9aed1607365d12758fa63fd011891a3f25249d3cd8783a56b8529d197
ID 11613 gen 369411 top level 11592 path Addons/btrfs/subvolumes/307ac631f1b53c62d39e9c9e81bdbdbb50a2295c35fb0ec672d168a0b129a623
ID 11636 gen 369429 top level 11592 path Addons/btrfs/subvolumes/00f7d2b44350aaca390824cda078000eec9c58f2a2e042918c078191f2273bda
ID 11637 gen 369429 top level 11592 path Addons/btrfs/subvolumes/b90a77336fe4551452aa4cdf796196ec95b4590cdf0c090fbd265818bccc3d5e
ID 11638 gen 369429 top level 11592 path Addons/btrfs/subvolumes/3c1b9f450611ab6453b173488fc683e914353564cc9c0dc5c47d07894bfa2209
ID 11639 gen 369429 top level 11592 path Addons/btrfs/subvolumes/c5e8279543be3d88f727a04e65f85b379ad006107f43881d9f50a2e63d7bbd8f
ID 11640 gen 369429 top level 11592 path Addons/btrfs/subvolumes/dd6c65f4cd212ae279f5312528239b78310a14242e8cc6305591a27c5035b203
ID 11641 gen 369429 top level 11592 path Addons/btrfs/subvolumes/f1187c625303d7cd75f4c7155e34ce31c949cbfb3cc43b1358a35d0a58596fd4
ID 11642 gen 369429 top level 11592 path Addons/btrfs/subvolumes/ebedd27c9b763c1cbd269d94af1f2e237ebad728a9d20e248a4e5754c8a5f8fd
ID 11643 gen 369429 top level 11592 path Addons/btrfs/subvolumes/6c52a40754193dc5ac6d65c767773066c769b706f3a3a103aca9bb19afdf6a38
ID 11644 gen 369429 top level 11592 path Addons/btrfs/subvolumes/a89b85f484862bafd80db72ac29868d041f264acdadc18e516da9ce9e179f131
ID 11645 gen 369429 top level 11592 path Addons/btrfs/subvolumes/d6abdac5ba9f2b88c47b131f3731346bc32467ad1e11f81953e399ae6db8353f
ID 11646 gen 369429 top level 11592 path Addons/btrfs/subvolumes/91f9b9169cabb82789d30634e04b582627a1de2427728e646980701f4c2319bb
ID 11647 gen 369429 top level 11592 path Addons/btrfs/subvolumes/5d58de59bfa070476891a1b9550db01a5617ad2872a2b041bd108dbb0122d452
ID 11648 gen 369429 top level 11592 path Addons/btrfs/subvolumes/efb6d74f0e4e9edec5cdbe364528119e60ae9d27153be8ed79e305a5fdaa6257
ID 11649 gen 369429 top level 11592 path Addons/btrfs/subvolumes/07e4cf311748e540678562eb8fb5ea0d06848cda5bd356d42c1662c87f04ce7b
ID 11650 gen 369429 top level 11592 path Addons/btrfs/subvolumes/e519bd1467212c3434a1101ffda89fe6139cc5ddae30659eaca1c78c828b2e28
ID 11651 gen 369429 top level 11592 path Addons/btrfs/subvolumes/f73c313e19e3c713ad2a4cbe235c634d93b32cfe07120afcddc0bbf203665669
ID 11652 gen 369429 top level 11592 path Addons/btrfs/subvolumes/5174d964cd4f634441da4e994eba2ea63a610401dd90e48c221b9025016b55b8
ID 11653 gen 369429 top level 11592 path Addons/btrfs/subvolumes/8826f04f4ba028a1b24248b9a952823393e28986b896cbc13360b4bff5704c3b
ID 11654 gen 369429 top level 11592 path Addons/btrfs/subvolumes/ee22ea6d013dfff4be25c5db4b996a55c3283cbe7fc70d75a2407d544e47b2c8
ID 11655 gen 369429 top level 11592 path Addons/btrfs/subvolumes/0a876f927d3481491bb241731fd1ddf16fd5b7206cb163200de3ce946c18b5b5
ID 11656 gen 369429 top level 11592 path Addons/btrfs/subvolumes/2d15c6e78f530943a44e9ca606c41abb3b5dad9ed20007fa772ec065058567f8
ID 11657 gen 369429 top level 11592 path Addons/btrfs/subvolumes/b66ee0806a130f58f5f644dff6afae4212eb3cd4702c88b8453528f4a49f67df
ID 11658 gen 369429 top level 11592 path Addons/btrfs/subvolumes/bbe33b872682b02943f13035007ecb664c2b0bd97db8d39cc721026e85cfc76b
ID 11659 gen 369429 top level 11592 path Addons/btrfs/subvolumes/f7449bd23df5169aed9ff7c6ac62a06aa15c730b530e94173ea57637a81db853
ID 11660 gen 369429 top level 11592 path Addons/btrfs/subvolumes/2d45cc575b8513824ab7d589189445f0a85ab935574bf8db16a5fdb84b1b2544
ID 11685 gen 369429 top level 11592 path Addons/btrfs/subvolumes/712684b4f3107f58a14bbca18ec2501fee638ed577d8075ec238b0d6ceb09176-init
ID 11686 gen 369429 top level 11592 path Addons/btrfs/subvolumes/712684b4f3107f58a14bbca18ec2501fee638ed577d8075ec238b0d6ceb09176
ID 11691 gen 544436 top level 5 path Rockons
ID 11692 gen 375522 top level 11691 path Rockons/btrfs/subvolumes/00f7d2b44350aaca390824cda078000eec9c58f2a2e042918c078191f2273bda
ID 11693 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/b90a77336fe4551452aa4cdf796196ec95b4590cdf0c090fbd265818bccc3d5e
ID 11694 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/3c1b9f450611ab6453b173488fc683e914353564cc9c0dc5c47d07894bfa2209
ID 11695 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/c5e8279543be3d88f727a04e65f85b379ad006107f43881d9f50a2e63d7bbd8f
ID 11696 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/dd6c65f4cd212ae279f5312528239b78310a14242e8cc6305591a27c5035b203
ID 11697 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/f1187c625303d7cd75f4c7155e34ce31c949cbfb3cc43b1358a35d0a58596fd4
ID 11698 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/ebedd27c9b763c1cbd269d94af1f2e237ebad728a9d20e248a4e5754c8a5f8fd
ID 11699 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/6c52a40754193dc5ac6d65c767773066c769b706f3a3a103aca9bb19afdf6a38
ID 11700 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/a89b85f484862bafd80db72ac29868d041f264acdadc18e516da9ce9e179f131
ID 11701 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/d6abdac5ba9f2b88c47b131f3731346bc32467ad1e11f81953e399ae6db8353f
ID 11702 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/91f9b9169cabb82789d30634e04b582627a1de2427728e646980701f4c2319bb
ID 11703 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/5d58de59bfa070476891a1b9550db01a5617ad2872a2b041bd108dbb0122d452
ID 11704 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/efb6d74f0e4e9edec5cdbe364528119e60ae9d27153be8ed79e305a5fdaa6257
ID 11705 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/07e4cf311748e540678562eb8fb5ea0d06848cda5bd356d42c1662c87f04ce7b
ID 11706 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/e519bd1467212c3434a1101ffda89fe6139cc5ddae30659eaca1c78c828b2e28
ID 11707 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/f73c313e19e3c713ad2a4cbe235c634d93b32cfe07120afcddc0bbf203665669
ID 11708 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/5174d964cd4f634441da4e994eba2ea63a610401dd90e48c221b9025016b55b8
ID 11709 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/8826f04f4ba028a1b24248b9a952823393e28986b896cbc13360b4bff5704c3b
ID 11710 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/ee22ea6d013dfff4be25c5db4b996a55c3283cbe7fc70d75a2407d544e47b2c8
ID 11711 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/0a876f927d3481491bb241731fd1ddf16fd5b7206cb163200de3ce946c18b5b5
ID 11712 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/2d15c6e78f530943a44e9ca606c41abb3b5dad9ed20007fa772ec065058567f8
ID 11713 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/b66ee0806a130f58f5f644dff6afae4212eb3cd4702c88b8453528f4a49f67df
ID 11714 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/bbe33b872682b02943f13035007ecb664c2b0bd97db8d39cc721026e85cfc76b
ID 11715 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/f7449bd23df5169aed9ff7c6ac62a06aa15c730b530e94173ea57637a81db853
ID 11716 gen 369429 top level 11691 path Rockons/btrfs/subvolumes/2d45cc575b8513824ab7d589189445f0a85ab935574bf8db16a5fdb84b1b2544
ID 11789 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/17bd2058e0c6500de157d98d3acd24c2033a5e235334f6c722f27de9726f24b5
ID 11790 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/3f0d3d140ce1aca1e2877e6efded1031f015be66bb82add6dece45230022abe1
ID 11791 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/c28cbef85c399931a42eb6dd1b69557b81e9bb471055bbd1296759740307d259
ID 11792 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/0d3e866c82f3f509525a893cc8999c2da3d0fb9c955ffbd0154297614a805593
ID 11793 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/13598900855e39bb30411f8a20c33d0ae7572bee6b75df611bbf5dd5ada598a5
ID 11794 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/cf1a1b59084ce35d8b34ef414c23c84448e23c3f120c6105205c91a1b515adbc
ID 11795 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/e6bedb5a969f5b4ee6bfbd5c17686ff38a16462a3be8d8c9a00f6088f208a7fb
ID 11796 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/a7d219e5a6906267fa22ac579aabc371b25008ebc1fab053111aa0b75d2cf80a
ID 11797 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/82741c0d3ce77a1ab63955aa1f08198895b2724bdb292714ca8b7ccc697df993
ID 11798 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/b55606bc8804256a3ea1c60e2cc77bc07120224524f0b59ac4678c052e14fa3d
ID 11799 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/567f0a015228c23c47c335f8f1195f62dd9d1115f6509bc50d77bcf8743fcf17
ID 11800 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/d3d156e668330bef2c6120deb6557601ee3a4b30c50285a4b3d108ade4003748
ID 11801 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/6ffc4d09c455d9f58841c3f2fbac36c95bfd3224cddb54e9c9bf6225fe8f7eaa
ID 11802 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/cdb3e89d965353b655b2c640b65af61cc20b8c9f4582be5e3dbe217ac8bc0522
ID 11803 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/10b6257d6fa60b9e77f5b9cbbd50b35e096dfa417f5af272d43005d70328896a
ID 11804 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/6c471371f94c004bd26819bbb790d1eb2213603ef28c384eea41bc6645f13b5c
ID 11805 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/2cd14959fe7f588e4353fe488f743c719dc55fde1e0719d1767481a7181acc3a
ID 11806 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/ef806b0cb1627989483f13b6e92f8c50e222243082f640fb5bd920cb00a8a9dc
ID 11807 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/d9bd192f958c3de64a7e550462fb309199e0fb9a0e2325ba518a2347b5a5690e
ID 11808 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/e27072f60451f271cf09094bdd8892810787e18e64501a5a63cf7b07e5aabb9b
ID 11809 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/f12295ce7c9314f04168a4e1600ec81f5ee2fbd4931c7ae18c7d1e8e2a32c805
ID 11810 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/66c757960b9caeb6312040117be60d8fcc95794e416c89dd33b6cc31084703c5
ID 11811 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/24166504b77b373ac40737757e411848b9c0fee96cd1c540a9e566748fc9f0a4
ID 11812 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/402d1b6f0d7163efc8aab431ec328f713ad8a3016003a2532d8e4413d2950861
ID 11813 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/bd5e2c58475d51c452e5aecfb666c727cabb24502994903c73971c75daf7b3e4
ID 11814 gen 369365 top level 11691 path Rockons/btrfs/subvolumes/acb1c325ec253207745f7b051490b34a0a628beeb03ae132665477dd5aec875f-init
ID 11815 gen 544434 top level 11691 path Rockons/btrfs/subvolumes/acb1c325ec253207745f7b051490b34a0a628beeb03ae132665477dd5aec875f
ID 11897 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/1f2a121fc3e47c2a96bbb719774b1ba01560ff7294dc2fb12dfd9db0381d0b98
ID 11898 gen 369328 top level 11691 path Rockons/btrfs/subvolumes/8d8b679a55bc4cde7d7f104d3fd993d860c22accd3d7c094baa0c7f68d6c1373
ID 11899 gen 375520 top level 11691 path Rockons/btrfs/subvolumes/d2ae089daf4f5706ca64221e821f720c76401dabd09e1e8829df4658aa967943
ID 11900 gen 369328 top level 11691 path Rockons/btrfs/subvolumes/59f6faa97c6d835ca9bc4f94aaea148afece67f6aa2564932a56fd2fb93df0a1
ID 11901 gen 375521 top level 11691 path Rockons/btrfs/subvolumes/1b65df78bb3d60ae531be49a14155d5c118a22d7ce9cf9bb04b443f81950442c
ID 11902 gen 369328 top level 11691 path Rockons/btrfs/subvolumes/7e0adff951970285ddc8b51bf7231b48e9000f4f81f7eebc67fc9f4c3d94f372
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ID 14048 gen 544328 top level 5 path VMs

Devon_Warren · July 10, 2017, 1:38pm

Actually realized I was getting the errors below in dmesg. I’m hoping I can RMA the drive and recover that way but if anyone has any suggestions to try let me know

[33334.203735] BTRFS error (device sdc): Remounting read-write after error is not allowed
[33345.015782] BTRFS info (device sdc): disk space caching is enabled
[33345.015784] BTRFS error (device sdc): Remounting read-write after error is not allowed
[33345.548789] BTRFS info (device sdc): disk space caching is enabled
[33345.548791] BTRFS error (device sdc): Remounting read-write after error is not allowed

phillxnet · July 10, 2017, 3:09pm

@Devon_Warren I don’t think that error:

means the drive itself, I think it’s just using the last drive scanned as an indicator of underlying devices.
Normally if it’s a drive read write issue it looks different. Here I think it’s just indicating refusal to mount rw. Unless you can find more specific errors further back of course.

You might find that after another power cycle, assuming drive names change, that the same message appears against a different drive.

I think drive specific read / write errors are more like:

BTRFS info (device sdf): bdev /dev/sde errs: wr 402545, ...

Hope that helps.