On Fri, Dec 15, 2017 at 6:34 AM, Roman Mamedov <r...@romanrm.net> wrote:
> On Fri, 15 Dec 2017 01:39:03 +0100
> Ian Kumlien <ian.kuml...@gmail.com> wrote:
>
>> Hi,
>>
>> Running a 4.14.3 kernel, this just happened, but there should have
>> been another 20 gigs or so available.
>>
>> The filesystem seems fine after a reboot though
>
> What are your mount options, and can you show the output of "btrfs fi
> df" and "btrfs fi us" for the filesystem? And what does
> "cat /sys/block/sdb/queue/rotational" return.
It's a btrfs raid1 mirror of two ssd:s
mount options was:
defaults,acl,noatime,space_cache,autodefrag,compress=lzo
btrfs fi df /
Data, RAID1: total=459.25GiB, used=372.42GiB
Data, single: total=8.00MiB, used=0.00B
System, RAID1: total=8.00MiB, used=80.00KiB
System, single: total=4.00MiB, used=0.00B
Metadata, RAID1: total=6.00GiB, used=3.69GiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=0.00B
btrfs fi us /
Overall:
Device size: 930.54GiB
Device allocated: 930.53GiB
Device unallocated: 20.05MiB
Device missing: 0.00B
Used: 752.22GiB
Free (estimated): 86.84GiB (min: 86.84GiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:8.00MiB, Used:0.00B
/dev/sdb2 8.00MiB
Data,RAID1: Size:459.25GiB, Used:372.42GiB
/dev/sdb2 459.25GiB
/dev/sdc2 459.25GiB
Metadata,single: Size:8.00MiB, Used:0.00B
/dev/sdb2 8.00MiB
Metadata,RAID1: Size:6.00GiB, Used:3.69GiB
/dev/sdb2 6.00GiB
/dev/sdc2 6.00GiB
System,single: Size:4.00MiB, Used:0.00B
/dev/sdb2 4.00MiB
System,RAID1: Size:8.00MiB, Used:80.00KiB
/dev/sdb2 8.00MiB
/dev/sdc2 8.00MiB
Unallocated:
/dev/sdb2 24.00KiB
/dev/sdc2 20.02MiB
And as expected:
cat /sys/block/sdb/queue/rotational
0
> I wonder if it's the same old "ssd allocation scheme" problem, and no
> balancing done in a long time or at all.
I had something similar happen on a laptop a while ago - took a while
before i could get it back in order
(in that case i think it was actually a oops --- it kept saying "no
space left" and switched to read only even
if you removed a lot of data, invalidated the space cache and so on)
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