Hi, How does btrfs handle raid1 on a bunch of uneven sized disks? Can I just keep adding arbitrarily sized disks to an existing raid1 and expect the file system to continue to keep two copies of everything, so I could survive the loss of any single disk without data loss? Does btrfs work this way?
For backing up several machines at home, I use an old Debian machine which is equipped with some spare disks I could get my hands on. Currently that would be 2 x 2TB, 1 x 1.5TB , 3 x 1TB disks. Traditionally I'm using rsync to create hardlinked backups on ext3/4 on md-raid1. This setup has been working reliably for many years now, including the survival of two disk failures. But it is quite cumbersome to reshape the structure of the raids when I get a new disk, an old one fails, or space requirements change. A single btrfs with snapshots would be much easier to handle. I'm not aiming for absolute reliability here -- all the really important stuff is backed up in a third place as well. But I would rather not like my file system to be the weakest link in the backup chain. Regards, Jim -- 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
