[CentOS] New install RAID 1+0

Craig White craigwhite at azapple.com
Thu Nov 19 18:50:41 UTC 2009

On Thu, 2009-11-19 at 10:42 -0800, John R Pierce wrote:
> Craig White wrote:
> > I have a new server to setup. 4 hard drives and I had intended it to be
> > hardware raid but that's a long story.
> >
> > Does it make sense to set up the first two hard drives with RAID-0
> > partitions and then get through the install and then go back later and
> > then create identically sized RAID-0 partitions on the other two drives
> > and finally create the RAID-1 mirror from the first to the second?
> >   
> are we to assume that your 'long story' involves this *not* being 
> hardware raid?  so you're setting this up with mdraid?  or what?
> if mdraid, I'd probably boot the CD (or PXE) to rescue mode, use fdisk 
> and mdadm to partition and raid the drives as you like, then reboot the 
> CD/PXE into normal install mode, and install onto the md devices you 
> pre-created.
> oh, and you normally build two mirrors (raid1) then stripe them together 
> (raid0) rather than the other way around.
yes, mdraid

OK, noted... make them in raid-1 first - I gather all of the mdadm
commands will have to be done in the shell prior to install.



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