Are you running ZFS and RAIDZ on Linux or BSD? On 10 Dec 2014 23:21, "Javier J" <jav...@advancedmachines.us> wrote:
> I'm just going to chime in here since I recently had to deal with bit-rot > affecting a 6TB linux raid5 setup using mdadm (6x 1TB disks) > > We couldn't rebuild because of 5 URE sectors on one of the other disks in > the array after a power / ups issue rebooted our storage box. > > We are now using ZFS RAIDZ and the question I ask myself is, why wasn't I > using ZFS years ago? > > +1 for ZFS and RAIDZ > > > > On Wed, Dec 10, 2014 at 8:40 AM, Rob Seastrom <r...@seastrom.com> wrote: > > > > > The subject is drifting a bit but I'm going with the flow here: > > > > Seth Mos <seth....@dds.nl> writes: > > > > > Raid10 is the only valid raid format these days. With the disks as big > > > as they get these days it's possible for silent corruption. > > > > How do you detect it? A man with two watches is never sure what time it > > is. > > > > Unless you have a filesystem that detects and corrects silent > > corruption, you're still hosed, you just don't know it yet. RAID10 > > between the disks in and of itself doesn't help. > > > > > And with 4TB+ disks that is a real thing. Raid 6 is ok, if you accept > > > rebuilds that take a week, literally. Although the rebuild rate on our > > > 11 disk raid 6 SSD array (2TB) is less then a day. > > > > I did a rebuild on a RAIDZ2 vdev recently (made out of 4tb WD reds). > > It took nowhere near a day let alone a week. Theoretically takes 8-11 > > hours if the vdev is completely full, proportionately less if it's > > not, and I was at about 2/3 in use. > > > > -r > > > > >
