On Tue, Apr 04, 2017 at 09:29:11AM -0400, Brian B wrote: > On 04/04/2017 12:02 AM, Robert Krig wrote: > > My storage array is BTRFS Raid1 with 4x8TB Drives. > > Wouldn't it be possible to simply disconnect two of those drives, mount > > with -o degraded and still have access (even if read-only) to all my data? > Just jumping on this point: my understanding of BTRFS "RAID1" is that > each file (block?) is randomly assigned to two disks of the array (no Arbitrarily assigned, rather than randomly assigned (there is a deterministic algorithm for it, but it's wise not to rely on the exact behaviour of that algorithm, because there are a number of factors that can alter its behaviour). > matter how many disks are in the array). So if you remove two disks, > you will probably have files that were "assigned" to both of those > disks, and will be missing. > > In short, you can't remove more than one disk of a BTRFS RAID1 and still > have all of your data. Indeed. Hugo. -- Hugo Mills | Some days, it's just not worth gnawing through the hugo@... carfax.org.uk | straps http://carfax.org.uk/ | PGP: E2AB1DE4 |
Attachment:
signature.asc
Description: Digital signature
