[linux-lvm] LVM on Raid 5 Performance?

[Jason H. Smith]

I don't know if this answers your question, but maybe search the archives 
for my posts a few months ago.  On 2.4, there's a misfeature when using 
LVM with RAID5.  Basically, the two will cause your system not to cache 
any data, and to sync to disk immediately, once you create a snapshot 
volume.  Apparently, this will be addressed in 2.6.

So if you want RAID5 and LVM, consider hardware acceleration.

HTH

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