Re: Sharing disks amoung multiple software RAIDs

["Keld Jørn Simonsen" <keld@dkuug.dk>]

On Sun, May 04, 2008 at 04:06:44PM -0600, Maurice Hilarius wrote:
> Keld Jørn Simonsen wrote:
> >..
> >Hmm, would raid10,n2, or raid10,f2 then have these flaws too?
> >  
> I do not know.
> I am, however, about to do some testing to find out.
> Our company routinely was using RAID1 on systems, until we discovered this.
> With no ability to boot from RAID5 and similar this leaves us in a bit 
> of a bind.

As raid10,n2 is data wise equivalent to RAID1, then grub/lilo should be
able to boot from raid10,n2. 

raid10,n2 should have better performance than RAID10, but raid10,f2
actually should have better performance than both of the others. 
See http://linux-raid.osdl.org/index.php/Performance (which I wrote).
That is why I advocated raid10,f2 for the system partitions, as far as
possible, only having /boot as a RAID1. 
I have a setup which implements this and it runs fine.

I look forward to hear about your tests on this.

Best regards
keld
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