Cannot convert to raid1

Cannot convert to raid1

[Juan Orti Alcaine]

Hello, I'm experiencing problems while balancing a filesystem to 
raid1. The versions I'm using are: 
kernel-4.0.0-0.rc5.git1.3.fc22.x86_64
btrfs-progs-3.19.1-1.fc22.x86_64

The filesystem was created with one device, and I have added two more 
devices afterwards. To convert it to raid1, I have used:

# btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/btrfs_raid1

The balance process has finished, but if I check my filesystem, it 
shows up as single

# btrfs fi show /mnt/btrfs_raid1
Label: 'btrfs_raid1'  uuid: cd7d4b6d-fa6b-4e2e-8b53-116d25ccdf4e
        Total devices 3 FS bytes used 1.19TiB
        devid    1 size 1.81TiB used 410.06GiB path /dev/sdb2
        devid    2 size 1.81TiB used 410.00GiB path /dev/sdc2
        devid    3 size 1.81TiB used 410.00GiB path /dev/sdd2

btrfs-progs v3.19.1

# btrfs fi df /mnt/btrfs_raid1
Data, single: total=1.19TiB, used=1.19TiB
System, DUP: total=32.00MiB, used=176.00KiB
Metadata, DUP: total=5.00GiB, used=3.73GiB
GlobalReserve, single: total=512.00MiB, used=0.00B

# btrfs fi usage /mnt/btrfs_raid1
Overall:
    Device size:                   5.44TiB
    Device allocated:              1.20TiB
    Device unallocated:            4.24TiB
    Device missing:                  0.00B
    Used:                          1.20TiB
    Free (estimated):              4.24TiB      (min: 2.12TiB)
    Data ratio:                       1.00
    Metadata ratio:                   2.00
    Global reserve:              512.00MiB      (used: 0.00B)

Data,single: Size:1.19TiB, Used:1.19TiB
   /dev/sdb2     406.00GiB
   /dev/sdc2     405.00GiB
   /dev/sdd2     409.00GiB

Metadata,DUP: Size:5.00GiB, Used:3.73GiB
   /dev/sdb2       4.00GiB
   /dev/sdc2       5.00GiB
   /dev/sdd2       1.00GiB

System,DUP: Size:32.00MiB, Used:176.00KiB
   /dev/sdb2      64.00MiB

Unallocated:
   /dev/sdb2       1.41TiB
   /dev/sdc2       1.41TiB
   /dev/sdd2       1.41TiB


-- 
Juan Orti
https://miceliux.com

GPG key: https://miceliux.com/pub/pubkey.asc
GPG fingerprint: 61F0 8272 6882 BCA6 3A35  88F6 B630 4B72 DEEB D08B

Re: Cannot convert to raid1

[Chris Murphy]

On Sun, Mar 29, 2015 at 1:15 PM, Juan Orti Alcaine
<juan.orti@miceliux.com> wrote:

> The filesystem was created with one device, and I have added two more
> devices afterwards. To convert it to raid1, I have used:
>
> # btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/btrfs_raid1

> The balance process has finished, but if I check my filesystem, it
> shows up as single

Yeah, I'm kinda stumped. The only thing I'm thinking is if you're
absolutely sure it's mounted at /mnt/btrfs_raid1 – because I've made
this mistake before. (Oops.)

-- 
Chris Murphy

Re: Cannot convert to raid1

[Holger Hoffstätte]

On Sun, 29 Mar 2015 13:40:56 -0600, Chris Murphy wrote:

> On Sun, Mar 29, 2015 at 1:15 PM, Juan Orti Alcaine
> <juan.orti@miceliux.com> wrote:
> 
>> The filesystem was created with one device, and I have added two more
>> devices afterwards. To convert it to raid1, I have used:
>>
>> # btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/btrfs_raid1
> 
>> The balance process has finished, but if I check my filesystem, it
>> shows up as single
> 
> Yeah, I'm kinda stumped. The only thing I'm thinking is if you're
> absolutely sure it's mounted at /mnt/btrfs_raid1 – because I've made
> this mistake before. (Oops.)

Nope, known bug in 4.0-rc:
http://thread.gmane.org/gmane.comp.file-systems.btrfs/43117

..nag, nag..

-h

Re: Cannot convert to raid1

[Juan Orti Alcaine]

El 2015-03-29 22:04, Holger Hoffstätte escribió:
> On Sun, 29 Mar 2015 13:40:56 -0600, Chris Murphy wrote:
> 
>> On Sun, Mar 29, 2015 at 1:15 PM, Juan Orti Alcaine
>> <juan.orti@miceliux.com> wrote:
>> 
>>> The filesystem was created with one device, and I have added two more
>>> devices afterwards. To convert it to raid1, I have used:
>>> 
>>> # btrfs balance start -dconvert=raid1 -mconvert=raid1 
>>> /mnt/btrfs_raid1
>> 
>>> The balance process has finished, but if I check my filesystem, it
>>> shows up as single
>> 
>> Yeah, I'm kinda stumped. The only thing I'm thinking is if you're
>> absolutely sure it's mounted at /mnt/btrfs_raid1 – because I've made
>> this mistake before. (Oops.)
> 
> Nope, known bug in 4.0-rc:
> http://thread.gmane.org/gmane.comp.file-systems.btrfs/43117


Do you know if the fix is going to do it for 4.0 final?
Thank you.

-- 
Juan Orti
https://miceliux.com

GPG key: https://miceliux.com/pub/pubkey.asc
GPG fingerprint: 61F0 8272 6882 BCA6 3A35  88F6 B630 4B72 DEEB D08B

Re: Cannot convert to raid1

[Holger Hoffstätte]

On Mon, 30 Mar 2015 08:16:44 +0200, Juan Orti Alcaine wrote:

> El 2015-03-29 22:04, Holger Hoffstätte escribió:
>> On Sun, 29 Mar 2015 13:40:56 -0600, Chris Murphy wrote:
>> 
>>> On Sun, Mar 29, 2015 at 1:15 PM, Juan Orti Alcaine
>>> <juan.orti@miceliux.com> wrote:
>>> 
>>>> The filesystem was created with one device, and I have added two more
>>>> devices afterwards. To convert it to raid1, I have used:
>>>> 
>>>> # btrfs balance start -dconvert=raid1 -mconvert=raid1 
>>>> /mnt/btrfs_raid1
>>> 
>>>> The balance process has finished, but if I check my filesystem, it
>>>> shows up as single
>>> 
>>> Yeah, I'm kinda stumped. The only thing I'm thinking is if you're
>>> absolutely sure it's mounted at /mnt/btrfs_raid1 – because I've made
>>> this mistake before. (Oops.)
>> 
>> Nope, known bug in 4.0-rc:
>> http://thread.gmane.org/gmane.comp.file-systems.btrfs/43117
> 
> 
> Do you know if the fix is going to do it for 4.0 final?
> Thank you.

No idea, sorry. So far I don't see anything in Chris' trees.
I maintain my own kernel (for btrfs and some other extensions) and
just skipped that particular commit for now.

-h