On Fri, Nov 28, 2014 at 01:37:50AM +1100, Russell Coker wrote: > I had a RAID-1 filesystem with 2*3TB disks and 330G of disk space free > according to df -h. I replaced a 3TB disk with a 4TB disk and df reported no > change in the free space (as expected). Did you btrfs resize that 4TB disk? If not, btrfs still thinks the 4TB disk is a 3TB disk, and the rest follows from that. > I added a 1TB disk to the filesystem and there was still no change! I > expected that adding a 1TB disk would give 3TB+1TB on one side and 4TB on the > other so I would instantly get an extra 1TB of free space according to df -h. > > 1072 out of about 2734 chunks balanced (1073 considered), 61% left > > I ran btrfs balance for just over a day and a btrfs balance status reported > the above. But it still only showed 860G free according to df -h. I've > cancelled the balance because 860G of free space is enough for the moment and > I don't want that server running slowly and making noise any more. > > I think that the allocation of disk space needs to be improved. If I added a > 1TB disk to a pair of 3TB disks then it would be quite reasonably for some > serious reallocation to be required to make use of the extra space. But when > I added a 1TB disk to an array that had a 3TB and a 4TB then it should be able > to make use of the space quite easily. > > -- > My Main Blog http://etbe.coker.com.au/ > My Documents Blog http://doc.coker.com.au/ > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html
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