Re: Software RAID5
Goswin von Brederlow wrote:
> Jose Fonseca <email@example.com> writes:
>> On Sun, 28 May 2006 13:00:19 +0200, Jean-Luc Coulon (f5ibh) wrote:
>>> 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?
>> 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
> Recent kernels and mdadm have support for rebuilding a raid
> now. Better to use that where possible.
To say.. move from RAID1 to RAID6? I wasn't aware, seeing that the
number of devices changes, and the filesystem has to be modified. Cool
if true. I'll go rtfm.