Cannot resize filesystem: not enough free space

Cannot resize filesystem: not enough free space

[Jakob Schöttl]

Help please, increasing the filesystem size doesn't work.

When mounting my btrfs filesystem, I had errors saying, "no space 
left
on device". Now I managed to mount the filesystem with -o 
skip_balance but:

# btrfs fi df /mnt
Data, RAID1: total=147.04GiB, used=147.02GiB
System, RAID1: total=8.00MiB, used=48.00KiB
Metadata, RAID1: total=1.00GiB, used=458.84MiB
GlobalReserve, single: total=181.53MiB, used=0.00B

It is full and resize doesn't work although both block devices sda 
and
sdb have more 250 GB and more nominal capacity (I don't have 
partitions,
btrfs is directly on sda and sdb):

# fdisk -l /dev/sd{a,b}*
Disk /dev/sda: 232.89 GiB, 250059350016 bytes, 488397168 sectors
[...]
Disk /dev/sdb: 465.76 GiB, 500107862016 bytes, 976773168 sectors
[...]

I tried:

# btrfs fi resize 230G /mnt
runs without errors but has no effect

# btrfs fi resize max /mnt
runs without errors but has no effect

# btrfs fi resize +1G /mnt
ERROR: unable to resize '/mnt': no enough free space

Any ideas? Thank you!

Re: Cannot resize filesystem: not enough free space

[Hugo Mills]

On Sun, Jan 24, 2021 at 07:23:21PM +0100, Jakob Schöttl wrote:
> 
> Help please, increasing the filesystem size doesn't work.
> 
> When mounting my btrfs filesystem, I had errors saying, "no space left
> on device". Now I managed to mount the filesystem with -o skip_balance but:
> 
> # btrfs fi df /mnt
> Data, RAID1: total=147.04GiB, used=147.02GiB
> System, RAID1: total=8.00MiB, used=48.00KiB
> Metadata, RAID1: total=1.00GiB, used=458.84MiB
> GlobalReserve, single: total=181.53MiB, used=0.00B

   Can you show the output of "sudo btrfs fi show" as well?

   Hugo.
 
> It is full and resize doesn't work although both block devices sda and
> sdb have more 250 GB and more nominal capacity (I don't have partitions,
> btrfs is directly on sda and sdb):
> 
> # fdisk -l /dev/sd{a,b}*
> Disk /dev/sda: 232.89 GiB, 250059350016 bytes, 488397168 sectors
> [...]
> Disk /dev/sdb: 465.76 GiB, 500107862016 bytes, 976773168 sectors
> [...]
> 
> I tried:
> 
> # btrfs fi resize 230G /mnt
> runs without errors but has no effect
> 
> # btrfs fi resize max /mnt
> runs without errors but has no effect
> 
> # btrfs fi resize +1G /mnt
> ERROR: unable to resize '/mnt': no enough free space
> 
> Any ideas? Thank you!

-- 
Hugo Mills             | Attempted murder, now honestly, what is that? Do
hugo@... carfax.org.uk | they give a Nobel Prize for attempted chemistry?
http://carfax.org.uk/  |
PGP: E2AB1DE4          |                                          Sideshow Bob

Re: Cannot resize filesystem: not enough free space

[Jakob Schöttl]

Hugo Mills <hugo@carfax.org.uk> writes:

> On Sun, Jan 24, 2021 at 07:23:21PM +0100, Jakob Schöttl wrote:
>> 
>> Help please, increasing the filesystem size doesn't work.
>> 
>> When mounting my btrfs filesystem, I had errors saying, "no 
>> space left
>> on device". Now I managed to mount the filesystem with -o 
>> skip_balance but:
>> 
>> # btrfs fi df /mnt
>> Data, RAID1: total=147.04GiB, used=147.02GiB
>> System, RAID1: total=8.00MiB, used=48.00KiB
>> Metadata, RAID1: total=1.00GiB, used=458.84MiB
>> GlobalReserve, single: total=181.53MiB, used=0.00B
>
>    Can you show the output of "sudo btrfs fi show" as well?
>
>    Hugo.
>  

Thanks, Hugo, for the quick response.

# btrfs fi show /mnt/
Label: 'data'  uuid: fc991007-6ef3-4c2c-9ca7-b4d637fccafb
        Total devices 2 FS bytes used 148.43GiB
        devid    1 size 232.89GiB used 149.05GiB path /dev/sda
        devid    2 size 149.05GiB used 149.05GiB path /dev/sdb

Oh, now I see! Resize only worked for one sda!

# btrfs fi resize 1:max /mnt/
# btrfs fi resize 2:max /mnt/
# btrfs fi show /mnt/
Label: 'data'  uuid: fc991007-6ef3-4c2c-9ca7-b4d637fccafb
        Total devices 2 FS bytes used 150.05GiB
        devid    1 size 232.89GiB used 151.05GiB path /dev/sda
        devid    2 size 465.76GiB used 151.05GiB path /dev/sdb

Now it works. Thank you!

>> It is full and resize doesn't work although both block devices 
>> sda and
>> sdb have more 250 GB and more nominal capacity (I don't have 
>> partitions,
>> btrfs is directly on sda and sdb):
>> 
>> # fdisk -l /dev/sd{a,b}*
>> Disk /dev/sda: 232.89 GiB, 250059350016 bytes, 488397168 
>> sectors
>> [...]
>> Disk /dev/sdb: 465.76 GiB, 500107862016 bytes, 976773168 
>> sectors
>> [...]
>> 
>> I tried:
>> 
>> # btrfs fi resize 230G /mnt
>> runs without errors but has no effect
>> 
>> # btrfs fi resize max /mnt
>> runs without errors but has no effect
>> 
>> # btrfs fi resize +1G /mnt
>> ERROR: unable to resize '/mnt': no enough free space
>> 
>> Any ideas? Thank you!


-- 
Jakob Schöttl
Phone: 0176 45762916
E-mail: jschoett@gmail.com
PGP-key: 0x25055C7F

Re: Cannot resize filesystem: not enough free space

[Hugo Mills]

On Sun, Jan 24, 2021 at 08:11:37PM +0100, Jakob Schöttl wrote:
> 
> Hugo Mills <hugo@carfax.org.uk> writes:
> 
> > On Sun, Jan 24, 2021 at 07:23:21PM +0100, Jakob Schöttl wrote:
> > > 
> > > Help please, increasing the filesystem size doesn't work.
> > > 
> > > When mounting my btrfs filesystem, I had errors saying, "no space
> > > left
> > > on device". Now I managed to mount the filesystem with -o
> > > skip_balance but:
> > > 
> > > # btrfs fi df /mnt
> > > Data, RAID1: total=147.04GiB, used=147.02GiB
> > > System, RAID1: total=8.00MiB, used=48.00KiB
> > > Metadata, RAID1: total=1.00GiB, used=458.84MiB
> > > GlobalReserve, single: total=181.53MiB, used=0.00B
> > 
> >    Can you show the output of "sudo btrfs fi show" as well?
> > 
> >    Hugo.
> 
> Thanks, Hugo, for the quick response.
> 
> # btrfs fi show /mnt/
> Label: 'data'  uuid: fc991007-6ef3-4c2c-9ca7-b4d637fccafb
>        Total devices 2 FS bytes used 148.43GiB
>        devid    1 size 232.89GiB used 149.05GiB path /dev/sda
>        devid    2 size 149.05GiB used 149.05GiB path /dev/sdb
> 
> Oh, now I see! Resize only worked for one sda!
> 
> # btrfs fi resize 1:max /mnt/
> # btrfs fi resize 2:max /mnt/
> # btrfs fi show /mnt/
> Label: 'data'  uuid: fc991007-6ef3-4c2c-9ca7-b4d637fccafb
>        Total devices 2 FS bytes used 150.05GiB
>        devid    1 size 232.89GiB used 151.05GiB path /dev/sda
>        devid    2 size 465.76GiB used 151.05GiB path /dev/sdb
> 
> Now it works. Thank you!

   Note that the new configuration is going to waste about 232 GiB of
/dev/sdb, because you've got RAID-1, and there won't be spare space to
mirror anything onto once /dev/sda fills up.

   You can add a third device of 232 GiB (250 GB) or more to the FS
and that'll allow the use of the remaining space on /dev/sdb.

   Hugo.

> > > It is full and resize doesn't work although both block devices sda
> > > and
> > > sdb have more 250 GB and more nominal capacity (I don't have
> > > partitions,
> > > btrfs is directly on sda and sdb):
> > > 
> > > # fdisk -l /dev/sd{a,b}*
> > > Disk /dev/sda: 232.89 GiB, 250059350016 bytes, 488397168 sectors
> > > [...]
> > > Disk /dev/sdb: 465.76 GiB, 500107862016 bytes, 976773168 sectors
> > > [...]
> > > 
> > > I tried:
> > > 
> > > # btrfs fi resize 230G /mnt
> > > runs without errors but has no effect
> > > 
> > > # btrfs fi resize max /mnt
> > > runs without errors but has no effect
> > > 
> > > # btrfs fi resize +1G /mnt
> > > ERROR: unable to resize '/mnt': no enough free space
> > > 
> > > Any ideas? Thank you!
> 
> 

-- 
Hugo Mills             | Have found Lost City of Atlantis. High Priest is
hugo@... carfax.org.uk | winning at quoits.
http://carfax.org.uk/  |
PGP: E2AB1DE4          |                                       Terry Pratchett