On Fri, May 10, 2013 at 11:43:34PM +0200, Marcus Lövgren wrote: > Yes, you were right! Adding another drive to the array made it continue > without errors. Is this already reported as a bug?
I believe it has been, yes. I think we've even had a patch out for it. I haven't looked to see if it's got into 3.10. Hugo. > Thanks for the help, > Marcus > > > 2013/5/10 Remco Hosman - Yerf IT <re...@yerf-it.nl> > > > On May 10, 2013, at 10:21 PM, Hugo Mills <h...@carfax.org.uk> wrote: > > > > > On Fri, May 10, 2013 at 10:07:56PM +0200, Marcus Lövgren wrote: > > >> Hi list, > > >> > > >> I am using kernel 3.9.0, btrfs-progs 0.20-rc1-253-g7854c8b. > > >> > > >> I have a three disk array of level single: > > >> > > >> # btrfs fi sh > > >> Label: none uuid: 2e905f8f-e525-4114-afa6-cce48f77b629 > > >> Total devices 3 FS bytes used 3.80TB > > >> devid 1 size 2.73TB used 2.25TB path /dev/sdd > > >> devid 2 size 2.73TB used 1.55TB path /dev/sdc > > >> devid 3 size 2.73TB used 0.00 path /dev/sdb > > >> > > >> Btrfs v0.20-rc1-253-g7854c8b > > >> > > >> # btrfs fi df /mnt/data > > >> Data: total=3.79TB, used=3.79TB > > >> System: total=4.00MB, used=420.00KB > > >> Metadata: total=6.01GB, used=4.87GB > > >> > > >> > > >> When running > > >> # btrfs balance start -dconvert=raid5 -mconvert=raid5 /mnt/data > > >> > > >> I get > > >> > > >> ERROR: error during balancing '/mnt/data' - Invalid argument > > >> There may be more info in syslog - try dmesg | tail > > >> > > >> dmesg | tail says: > > >> > > >> btrfs: unable to start balance with target data profile 128 > > >> > > >> Isn't it possible to convert raid level to raid5? > > > > > > Yes, it should be possible. It looks like the kernel's got a > > > problem with it, which is odd because 3.9 should know about RAID-5. > > > > > > > Wasn't there some issues that the kernel or tools wanted 4 disks when > > converting to raid5? > > > > Remco > > > > > Hugo. > > > -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Strive for apathy! ---
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