2008/12/29 Chris Samuel <chris@xxxxxxxxxxx>: > Hello Yan, > > On Mon, 29 Dec 2008 11:33:18 pm Yan Zheng wrote: > >> 2008/12/29 Chris Samuel <chris@xxxxxxxxxxx>: >> >> > The rebalancing code does appear (from a naive read of the code) to be >> > able to rebalance over stripes, but I have no idea if the disk format >> > currently supports changing that on the fly. >> >> The rebalancing moves data/metadata to newly created chunks. If there >> are two devices, the new chunks will be set up as RAID-1 by default. > > Very interesting! I didn't realise that - I was presuming that the > BTRFS_BLOCK_GROUP_RAID1 ioctl needed to be passed through (as at mkfs time) to > change it into a RAID1 array. > See __btrfs_reserve_extent and __btrfs_alloc_chunk. There is a mistake in my previous reply. Only metadata chunks are set up as RAID-1 by default when there are two devices. Regards Yan Zheng -- 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
