[mythtv-users] Seagate Lockups (was libraries over 8TB)

[Raymond Wagner]

On 7/7/2012 13:33, Travis Tabbal wrote:
>
>
> On Sat, Jul 7, 2012 at 11:28 AM, Jay Ashworth <jra at baylink.com
> <mailto:jra at baylink.com>> wrote:
>
>     ----- Original Message -----
>      > From: "Alexander Fisher" <alex at alexfisher.me.uk
>     <mailto:alex at alexfisher.me.uk>>
>
>      > I've also had some odd behavior from one of my non-enterprise Seagate
>      > drives. It's firmware locked up the other day, the drive not coming
>      > back without a power cycle.
>
>     I believe you had the same problem that I've had on 5 different Seagates
>     over the last 4 years:
>
>     There's a black hole somewhere on the drive.  If you never touch it,
>     the drive
>     works just fine.  But the second you even read one of those sectors, the
>     drive adapter falls off line, and Linux can't touch it anymore, and
>     it doesn't
>     recover until you power the drive off.  Once you do, everything's
>     fine until
>     you hit that spot again.
>
>
>
> My test for new drives is now to put them in a ZFS mirror, and fill them
> to 100% capacity, then to a zpool scrub on them to make sure they are
> holding the data properly.

No need to use a mirror, just do single drives.  ZFS checksums 
everything and will detect an error on a scrub even if you don't have 
another copy of the data to compare against.