[mythtv-users] Why RAID 5 stops working in 2009

[Another Sillyname]

2008/10/25 Steve Heistand <steve at heistand.org>:
> On Thu, 23 Oct 2008 11:34:56 +0100, Ian Clark wrote
>> 2008/10/23 Another Sillyname <anothersname at googlemail.com>
>>
>> > 2008/10/23 Mache Creeger <mache at creeger.com>:
>> > > From Slashdot
>> > >
>> > [snip]
>> >
>> > >
>> > >
>> >
>> > Given the amount of time it would take even a hardware controller to
>> > reconstruct a 2TB drive you'd be unwise to use them.
>> >
>> > 750GB drives using a decent hardware controller take about 30 hours to
>> > reconstruct a failed drive under raid 6.....this means you have a
>> > 'failure window' of those 30 hours when a 2nd failure kills you.  I
>> > can't imagine I'd even want this 'failure window' to be in the 72+
>> > hour timeframe.
>
> as a data point I had a drive get marked as failed last night, the raid volume got
> marked as "degraded".  I had stuff recording so it continued to add data
> for a few hours. once I felt it was save to tinker I pulled out the drive and
> reseated it. raid card saw the drive go back in and started rebuiding.
>
> 2008-10-25 6:10:48      volume_1        Complete Rebuild        009:11:57
> 9 hours on a 12T filesystem, hardware raid card of course to get those speeds.
>
>
> "Why is it so hot inside this handbasket?"
> --
> Steve Heistand
> steve at heistand.org
>
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Slightly OT

One thing to add to those of you thinking of going RAID and is touched
on in an earlier comment is that it's heat that kills drives.  If
you're serious about your raid can i recommend using something like
this...

http://www.supermicro.com/products/accessories/mobilerack/CSE-M35T-1.cfm

It has built in fans and temp sensors and i've seen them for about
$140, they also support hot swap.