On Fri, Oct 26, 2012 at 12:57:21PM +0200, Lluís Batlle i Rossell wrote: > I had a raid1 btrfs (540GB) on vanilla 3.6.3, a disk failed, and removed it at > power off, plugged in a new one, partitioned it (to 110GB, by error), and > added > it to btrfs. > > I tried to remove the missing device, and it said "Input/output error" after a > while. Next attempts simply gave "Invalid argument". > > Some data: > > # btrfs fi df / > Data, RAID1: total=507.62GB, used=417.08GB > Data: total=25.32GB, used=22.48GB > System, RAID1: total=32.00MB, used=92.00KB > System: total=4.00MB, used=0.00 > Metadata, RAID1: total=19.97GB, used=5.50GB
For the sake of mail archiving and future searches, problem solved; there is some 'single' data there (22.48GB). Removing the files containing that data allowed "btrfs device delete missing /" to work. For what I know, at 3.6 there were no error messages indicating about that. Then, scrub does not check anything related to missing disks, so it reports that all works. And I think that btrfsck also does not report anything related to missing disks. The way to get what files had the missing data was to run "tar c /", and wait for the errors report on EIO. Then I removed those files. Thanks a lot to Josef, who sent me patches adding error reports, to get closer to the source the errors, and the rest of the helpful people at the #btrfs @ freenode Regards, Lluís. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
