Re: no space left on device.

[Kenneth Johansson <kenneth@southpole.se>]

On 11/02/2012 04:54 PM, Kyle Gates wrote:
>> So I have ended up in a state where I can't delete files with rm.
>>
>> the error I get is no space on device. however I'm not even close to empty.
>> /dev/sdb1 38G 27G 9.5G 75%
>> there is about 800k files/dirs in this filesystem
>>
>> extra strange is that I can in another directory create and delete files.
>>
>> So I tried pretty much all I could google my way to but problem
>> persisted. So I decided to do a backup and a format. But when the backup
>> was done I tried one more time and now it was possible to delete the
>> directory and all content?
>>
>> using the 3.5 kernel in ubuntu 12.10. Is this a known issue ? is it
>> fixed in later kernels?
>>
>> fsck /btrfs scrub and kernel log. nothing indicate any problem of any kind.
>>
> First let's see the output of:
> btrfs fi df /mountpoint
>
> You're probably way over allocated in metadata so a balance should help:
> btrfs bal start -m /mountpoint
> or omit the -m option to run a full balance. 		
I had to use the disk for work so I could not be stuck in that situation 
and thus had to nuke the disk.
maybe I can recreate the state I put back mostly the same data again 
minus some stuff I did not really need.

So under what circumstance can this actually happen ? why could I 
remove/add files in one directory and not another? its the same 
partition. And also the filesystem was just a few days old and no 
snapshots or anything, well I do use lzo compression but other than that 
default values was used to create it.