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Re: Software RAID5

On Sun, 28 May 2006 13:00:19 +0200, Jean-Luc Coulon (f5ibh) wrote:

> Hi,
> I've a system with a software raid1 on 2 sata drive 80 GB
> I've all my system on LVM on this underlying raid.
> For performances reasons (video editing), I'm thinking if a RAID5.
> Is there somebody with some experience with raid5:
> - performances
> - behaviour in case of a crash
> Is there an easy process to migrate from raid1 to raid5 without  
> reinstalling everything?
> Regards
> Jean-Luc

I managed to switch from a 2x200Gb RAID-0 to a 3x200Gb RAID-5 without
reinstalling using raidreconf <http://unthought.net/raidreconf/> on my

I'm still amazed it work flawlessly, as latest raidreconf dates from 2001!
Obviously I backed-up everything before, but I didn't need used it.

Although I ran in a Amd64, I compiled raidreconf as a 32-bit application,
since I was afraid it wasn't 64-bit clean.

Then it's a matter of writing two raidtabs -- one describing the
current raid setup, and another describing the desired setup -- and run

José Fonseca

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