Re: multiple swap areas and RAID 1

[Georgi Naplatanov <gosho@oles.biz>]

On 08/08/2012 08:14 PM, � wrote:
> On Wed, 08 Aug 2012 16:25:01 +0300, Georgi Naplatanov wrote:
>
> > I'm going to configure Debian GNU/Linux with software RAID 1 and I think
> > to put swap area on RAID 1 (/dev/mdX), but someone told me that if the
> > computer have multiple swap partition (e.g. /dev/sda2, /dev/sdb2) with
> > equal priorities, linux kernel will mirror swap area between different
> > devices. Is that true ? I mean kernel 2.6.32 and 3.2.x.
>
> I guess you mean these two different approaches:
>
> 1. Swapping on RAID
> https://raid.wiki.kernel.org/index.php/Why_RAID%3F#Swapping_on_RAID
>
> 2. More on Linux RAID: Swap On RAID?
> http://blog.taggesell.de/index.php?/archives/53-More-on-Linux-RAID-Swap-On-RAID.html
>
> I'd go for the second: put swap under a raid-1 device; without going too
> much deep into the issue, it makes more sense to me.
>
> Greetings,

Hi Camaleón.

I did so - put swap on RAID 1.

I haven't found information about linux kernel possibility of mirroring 
swap automatically so this is probably misunderstanding or mistake.

Best regards
Georgi