I think I have some failing hard drives, they are disconnected for now.
stan {~} root# btrfs filesystem show
Label: none uuid: d71404d4-468e-47d5-8f06-3b65fa7776aa
Total devices 2 FS bytes used 6.27GB
devid 1 size 9.31GB used 8.16GB path /dev/sde6
*** Some devices missing
Label: none uuid: b142f575-df1c-4a57-8846-a43b979e2e09
Total devices 8 FS bytes used 1.35TB
devid 3 size 149.05GB used 119.01GB path /dev/sdf
devid 6 size 920.34GB used 408.00GB path /dev/sde7
devid 7 size 1.36TB used 885.00GB path /dev/sdd
devid 4 size 149.05GB used 119.01GB path /dev/sdc
devid 2 size 465.76GB used 435.00GB path /dev/sdb
devid 8 size 1.36TB used 885.00GB path /dev/sda
*** Some devices missing
stan {~} root# btrfs scrub status /storage
Killed
May 4 07:07:12 stan kernel: btrfs: allowing degraded mounts
May 4 07:07:12 stan kernel: btrfs: disk space caching is enabled
May 4 07:07:12 stan kernel: warning devid 5 missing
May 4 07:07:33 stan kernel: BUG: unable to handle kernel NULL pointer
dereference at (null)
May 4 07:07:33 stan kernel: IP: [<ffffffff812b21f0>] strncpy+0x10/0x30
May 4 07:07:33 stan kernel: PGD 76a1f067 PUD 76a21067 PMD 0
May 4 07:07:33 stan kernel: Oops: 0000 [#1] PREEMPT SMP
May 4 07:07:33 stan kernel: CPU 0
May 4 07:07:33 stan kernel: Modules linked in:
May 4 07:07:33 stan kernel:
May 4 07:07:33 stan kernel: Pid: 3283, comm: btrfs Not tainted 3.3.0
#10 To Be Filled By O.E.M. To Be Filled By O.E.M./A770DE+
May 4 07:07:33 stan kernel: RIP: 0010:[<ffffffff812b21f0>]
[<ffffffff812b21f0>] strncpy+0x10/0x30
May 4 07:07:33 stan kernel: RSP: 0018:ffff88007d2e7e10 EFLAGS: 00010206
May 4 07:07:33 stan kernel: RAX: ffff88007c243c00 RBX: ffff88007bef0600
RCX: ffff88007c243c00
May 4 07:07:33 stan kernel: RDX: 0000000000000400 RSI: 0000000000000000
RDI: ffff88007c243c00
May 4 07:07:33 stan kernel: RBP: 000000000062e920 R08: 0000000000000000
R09: 0000000000000000
May 4 07:07:33 stan kernel: R10: 0000000000000000 R11: 0000000000000246
R12: ffff88007c243000
May 4 07:07:33 stan kernel: R13: ffff88007b8fc7d8 R14: ffff88007c243008
R15: ffffffffffffffed
May 4 07:07:33 stan kernel: FS: 00007fa9d7ac7760(0000)
GS:ffff88007fc00000(0000) knlGS:0000000000000000
May 4 07:07:33 stan kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
May 4 07:07:33 stan kernel: CR2: 0000000000000000 CR3: 0000000076a28000
CR4: 00000000000006f0
May 4 07:07:33 stan kernel: DR0: 0000000000000000 DR1: 0000000000000000
DR2: 0000000000000000
May 4 07:07:33 stan kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0
DR7: 0000000000000400
May 4 07:07:33 stan kernel: Process btrfs (pid: 3283, threadinfo
ffff88007d2e6000, task ffff88007c83d6a0)
May 4 07:07:33 stan kernel: Stack:
May 4 07:07:33 stan kernel: ffffffff8125c3e0 0000000738e62f87
000000000040504c 0000000000000028
May 4 07:07:33 stan kernel: 0000000000000014 ffff88007bc82700
ffff88007b25a930 ffff88007c83d6a0
May 4 07:07:33 stan kernel: ffffffff81020eb9 00ff88007bc82760
0000000000000000 ff00000000000000
May 4 07:07:33 stan kernel: Call Trace:
May 4 07:07:33 stan kernel: [<ffffffff8125c3e0>] ?
btrfs_ioctl+0x1000/0x11e0
May 4 07:07:33 stan kernel: [<ffffffff81020eb9>] ?
do_page_fault+0x199/0x420
May 4 07:07:33 stan kernel: [<ffffffff810d3cce>] ? do_vfs_ioctl+0x8e/0x4f0
May 4 07:07:33 stan kernel: [<ffffffff810c0f6c>] ? fd_install+0x3c/0x80
May 4 07:07:33 stan kernel: [<ffffffff810d4179>] ? sys_ioctl+0x49/0x90
May 4 07:07:33 stan kernel: [<ffffffff816b4f22>] ?
system_call_fastpath+0x16/0x1b
May 4 07:07:33 stan kernel: Code: 0f 1f 00 0f b6 0c 16 88 0c 10 48 ff
c2 84 c9 75 f2 f3 c3 0f 1f 84 00 00 00 00 00 48 85 d2 48 89 f8 74 1e 48
89 f9 0f 1f 44 00 00 <0f> b6 3e 40 80 ff 01 40 88 39 48 83 de ff 48 ff
c1 48 ff ca 75
May 4 07:07:33 stan kernel: RIP [<ffffffff812b21f0>] strncpy+0x10/0x30
May 4 07:07:33 stan kernel: RSP <ffff88007d2e7e10>
May 4 07:07:33 stan kernel: CR2: 0000000000000000
May 4 07:07:33 stan kernel: ---[ end trace 64dfc95061520f57 ]---
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