[mythtv-users] Raid configurations

Stephen Tait tait at digitallaw.co.uk
Fri Aug 13 18:28:38 EDT 2004

RAID6 is pretty CPU-intensive (more so than RAID5 IIRC, but I could be 
wrong), as there's lots of parities to calculate 

Personally, I'd go RAID10 (striped mirrors, and can sustain the loss of up 
to two drives in a four drive setup) which would give you 500GB worth of 
stripe, but if you need the space, personally I'd stick with RAID5 
(possibly sacrificing one of the discs as a hot spare) which would give you 
~750GB (can't remember the exact formula).

My usual advice for complex RAID setups is to splash out on a 3ware :) The 
only problem with this at the moment is that support for the new 9000 
series isn't in any mainstream kernels yet. I'm personally going to be 
throwing my backend onto a RAID10 over four 250GB (or more) drives.

At 16:52 13/08/2004 -0500, you wrote:
>Anyone see any performance problems if I used four WD2500JD drives hung
>off a Promise SATA150 TX4 in software RAID6 for video storage? Of
>course, XFS on top of that.
>I just really don't want a single failure on a huge RAID0 video volume
>to destroy ALL my video.
>I figure that'd satisfy my storage cravings for a while, and be
>virtually free of worry for me, barring some form of corruption.
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