On 6 March 2018 at 00:48, Russell Coker via luv-main <luv-main@luv.asn.au> wrote:

If you are worried about data loss then latent sector errors is what you
should worry about. I've replaced lots of disks in production due to them
returning bat data and claiming it to be good. I can't remember the last time
I replaced a disk in production due to it giving read errors. The vast
majority of disk problems I've had in the last 10 years were only discovered
because of using ZFS or BTRFS and would have given silent data corruption on
any other filesystem.

I've had experience of this with my media server at home. I was running 2 x mirrored pairs with soft raid (mdadm) and it was happily mirroring corrupt data across a couple of TV series.

I switched to ZFS to manages the mirrored pairs and haven't had any issues since. When it came time to increase the disk pool size (both the physical disk size and pool size) ZFS made the job simple.

And luckily I was able to recover the corrupt data from the source DVDs.

Colin Fee
tfeccles@gmail.com