[CentOS] problem with swap and upgrade to 4 from 3.3

[Joshua Baker-LePain]

On Fri, 6 May 2005 at 9:03am, Daniel J. Cody wrote

> Hey Peter,

> > I guess I could set the swap back to an unmirrored set, run the upgrade 
> > from the CDs then mirror it again, but this is not ideal, does anyone 
> > have any suggestions as to how to fix this little RAID niggle with the 
> > swap caused by not RAIDing the swap parition originally on install?
> 
> I wouldn't personally recommend using software raid on swap partitions 
> since it causes all sorts of problems like you're describing. If you 
> want to get raid type performance from your swap partitions, I'd suggest 
> just letting the kernel itself handle that.

The main purpose of putting swap on a mirrored array is not performance.  
It allows the system to stay up and running should a disk fail.  Mirroring 
the system disk is pretty much pointless if the system is going to die 
upon losing a disk anyway b/c half the swap is now gone.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University