After adding a new drive to a btrfs raid1 array I cannot remount it.
One thing that went wrong for me after having successfully done this
many times before over the last five years is that in this case I failed
to format the partition as btrfs and just left it unformatted assuming
the btrfs command would format it or give me a warning. But I am not
sure that is what caused the problem.
So far I have tried physically disconnecting the added drive and trying
to mount read only but that has been unsuccessful.
I could forge ahead attempting to recover but I prefer to gather any
advice or suggestions I can get before making some foolish mistake. I
appreciate any comments you might have.
Here is what I am seeing:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[root@localhost ghmitch]# btrfs filesystem show
Label: 'COMMON' uuid: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
Total devices 7 FS bytes used 473.83GiB
devid 1 size 385.78GiB used 96.00GiB path /dev/sde4
devid 4 size 385.78GiB used 84.00GiB path /dev/sdc4
devid 5 size 385.78GiB used 85.00GiB path /dev/sdd4
devid 6 size 385.76GiB used 109.03GiB path /dev/sdf4
devid 7 size 385.76GiB used 110.00GiB path /dev/sdg4
devid 8 size 781.12GiB used 480.03GiB path /dev/sdb4
devid 9 size 458.98GiB used 0.00B path /dev/sda4
[root@localhost ghmitch]# btrfs check /dev/sda4
Checking filesystem on /dev/sda4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdb4
Checking filesystem on /dev/sdb4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdc4
Checking filesystem on /dev/sdc4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdd4
Checking filesystem on /dev/sdd4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sde4
Checking filesystem on /dev/sde4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdf4
Checking filesystem on /dev/sdf4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdg4
Checking filesystem on /dev/sdg4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728
should be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for
newer kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# mount LABEL=common /common
mount: can't find LABEL=common
[root@localhost ghmitch]# mount LABEL=COMMON /common
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@localhost ghmitch]# mount LABEL=COMMON /common
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@localhost ghmitch]#
I am attaching the output from journalctl for this.
[root@localhost ghmitch]# btrfs filesystem show
Label: 'COMMON' uuid: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
Total devices 7 FS bytes used 473.83GiB
devid 1 size 385.78GiB used 96.00GiB path /dev/sde4
devid 4 size 385.78GiB used 84.00GiB path /dev/sdc4
devid 5 size 385.78GiB used 85.00GiB path /dev/sdd4
devid 6 size 385.76GiB used 109.03GiB path /dev/sdf4
devid 7 size 385.76GiB used 110.00GiB path /dev/sdg4
devid 8 size 781.12GiB used 480.03GiB path /dev/sdb4
devid 9 size 458.98GiB used 0.00B path /dev/sda4
[root@localhost ghmitch]# btrfs check /dev/sda4
Checking filesystem on /dev/sda4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdb4
Checking filesystem on /dev/sdb4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdc4
Checking filesystem on /dev/sdc4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdd4
Checking filesystem on /dev/sdd4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sde4
Checking filesystem on /dev/sde4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdf4
Checking filesystem on /dev/sdf4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# btrfs check /dev/sdg4
Checking filesystem on /dev/sdg4
UUID: 4b0983d7-8d85-463d-85c1-c20aa3b4fa3b
checking extents
WARNING: unaligned total_bytes detected for devid 4, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
WARNING: unaligned total_bytes detected for devid 5, have 414224777728 should
be aligned to 4096
WARNING: this is OK for older kernel, but may cause kernel warning for newer
kernels
WARNING: this can be fixed by 'btrfs rescue fix-device-size'
ERROR: super total bytes 3402637811712 smaller than real device(s) size
3402637812736
ERROR: mounting this fs may fail for newer kernels
ERROR: this can be fixed by 'btrfs rescue fix-device-size'
checking free space cache
checking fs roots
checking csums
checking root refs
found 508766167040 bytes used, error(s) found
total csum bytes: 495196304
total tree bytes: 1548525568
total fs tree bytes: 891138048
total extent tree bytes: 111878144
btree space waste bytes: 305303118
file data blocks allocated: 1035580137472
referenced 506530619392
[root@localhost ghmitch]# mount LABEL=common /common
mount: can't find LABEL=common
[root@localhost ghmitch]# mount LABEL=COMMON /common
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@localhost ghmitch]# mount LABEL=COMMON /common
mount: wrong fs type, bad option, bad superblock on /dev/sdb4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@localhost ghmitch]#
