---- Jameson Pugh schrieb ----
On Sat, Feb 20, 2016 at 8:04 AM, Alistair Grant <akgrant0710@gmail.com> wrote:
On 20 February 2016 at 02:38, Jameson Pugh <imntreal@gmail.com> wrote:
I have a raid6 btrfs filesystem which I filled up, and added a disk to:
sudo btrfs fi show /dev/sdb Label: 'raid' uuid: 96c75e11-ab60-44b6-a450-4cd2831f86f0 Total devices 5 FS bytes used 917.77GiB devid 1 size 465.76GiB used 465.76GiB path /dev/sdb devid 2 size 465.76GiB used 465.76GiB path /dev/sdc devid 3 size 465.76GiB used 465.76GiB path /dev/sdd devid 4 size 931.51GiB used 465.76GiB path /dev/sde devid 5 size 1.82TiB used 0.00B path /dev/sdf
Despite having removed files, and added the new device, I still can't balance the filesystem:
...
Did you do it in that order? How about attempting to remove files after adding the new device.
As Guus said, removing a snapshot is more likely to help than removing files.
If you haven't already done so, I'd also suggest posting this to the linux-btrfs mailing list (see https://btrfs.wiki.kernel.org/index.php/Btrfs_mailing_list)
Yes. I've tried removing files after adding the device. Unfortunately, there are no snapshots. I could try removing subvolumes. I'll try the btrfs list.
As mentioned before, removing files doesn't solve the problem, and yes, ZFS suffers from the same problem (first hand experience...) As soon as the disk is full the Filesystem is paralysed. The only method that can help is nuking a big file, e.g. an HD movie you don't need or have a backup of. Try this: echo > /path/to/bloodyhugefile This reduces the file size to zero and should free enough space for new metadata. Greets Sebastian
Thanks, Jameson