On 11/25/2014 11:21 PM, Zygo Blaxell wrote: >> > However I still doesn't understood why you want btrfs-w/multiple disk over LVM ? > I want to split a few disks into partitions, but I want to create, > move, and resize the partitions from time to time. Only LVM can do > that without taking the machine down, reducing RAID integrity levels, > hotplugging drives, or leaving installed drives idle most of the time. > > I want btrfs-raid1 because of its ability to replace corrupted or lost > data from one disk using the other. If I run a single-volume btrfs > on LVM-RAID1 (or dm-RAID1, or RAID1 at any other layer of the storage > stack), I can detect lost data, but not replace it automatically from > the other mirror. OK, now I have understood. Anyway as workaround, take in account that you can pass explicitly the devices as: mount -o device=/dev/sda,device=/dev/sdb,device=/dev/sdc /dev/sdd /mnt (supposing that the filesystem is on /dev/sda.../dev/sdd) I am working to a mount.btrfs helper. The aim of this helper is to manage the assembling of multiple devices; the main points will be: - wait until all the devices appeared - allow (if required) to mount in degraded mode after a timeout - at this point it could/should also skip the lvm-snapshotted devices (but before I have to know how recognize these) I hope to issue the patches in the next week BR G.Baroncelli -- gpg @keyserver.linux.it: Goffredo Baroncelli <kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- 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
