[mythtv-users] thoughts on a combined backend/NAS box?

[Gary Buhrmaster]

On Tue, Jul 16, 2013 at 2:22 PM, Joseph Fry <joe at thefrys.com> wrote:
.....
> There is nothing wrong with RAID 5...

Actually, there is something wrong with RAID 5 with today's disks.
If the point of RAID 5 is ability to recover from one bad disk, there is
a fair chance that during the recovery, another drive will fail (or have
unreadable blocks), and your RAID reconstruction will then fail
(if you have hot spare designs, there are algorithms to use both
the good and bad drive(s) to reduce this exposure, but those are
not common (and some may be patent encumbered)).  If your goal
is recovery, you need to look at RAID 6.

And, as Joseph says, RAID is not a backup solution.  It is for
data availability.  Do not confuse the two, especially if the NAS
is for data you care about.

If you *truly* need to care about your data (say, you are a
bank with regulatory requirements), you run ZFS.  However,
if your goal is data availability, run RAID 6, not RAID 5.

Gary