>> 30 devices is really not that much, heck you get 90 disks top load JBOD >> storage chassis these days and BTRFS does sound like an attractive choice >> for things like that.
> So Mike's case is, that both metadata and data are configured as > raid6, and the operations, balance and scrub, that he tried, need to > set the existing block group as readonly (in order to avoid any > further changes being applied during operations are running), then we > got into the place where another system chunk is needed. > However, I think it'd be better to have some warnings about this when > doing a) mkfs.btrfs -mraid6, b) btrfs device add. > David, any idea? I'll certainly vote for a warning, I would have set this up differently had I been aware. My filesystem check seems to have returned successfully: [root@auswscs9903] ~ # btrfs check --readonly /dev/sdb Checking filesystem on /dev/sdb UUID: 77afc2bb-f7a8-4ce9-9047-c031f7571150 checking extents checking free space cache checking fs roots checking csums checking root refs found 97926270238720 bytes used err is 0 total csum bytes: 95395030288 total tree bytes: 201223503872 total fs tree bytes: 84484636672 total extent tree bytes: 7195869184 btree space waste bytes: 29627784154 file data blocks allocated: 97756261568512 I've remounted the filesystem and I can at least touch a file. I'm restarting the rsync that was running when it originally went read only. What is the next step if it drops back to r/o? ________________________________________________________________________ The information contained in this e-mail is for the exclusive use of the intended recipient(s) and may be confidential, proprietary, and/or legally privileged. Inadvertent disclosure of this message does not constitute a waiver of any privilege. If you receive this message in error, please do not directly or indirectly use, print, copy, forward, or disclose any part of this message. Please also delete this e-mail and all copies and notify the sender. Thank you. ________________________________________________________________________
