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

[John Drescher]

> My understanding is that raid5 and raid6 write performance is sensitive
> to the size of writes compared to the stripe size. Assuming that is true
> what would be the optimal stripe size for a mythtv raid5 for recording
> HDTV? Can the size of mythtv read and write sizes be adjusted to improve
> performance for a storage group on a raid5 array?
>

I used to make this big (ie 256K or larger) but now I go for 64K and
increase the size of the stripe cache if necessary.

Here is a link to some of my testing with different stripe cache settings:

http://forums.gentoo.org/viewtopic-t-709075-highlight-.html

John