Re: >12 drives in a RAID?

From: Mr. James W. Laferriere (babydr@baby-dragons.com)
Date: Thu May 09 2002 - 19:25:58 EST


        Hello Roy & All , Mr. Neil Brown <neilb@cse.unsw.edu.au>
        Has come up with a (somewhat) complete tool for software raid
        maintenance . Also might try raising these questions & concerns
        on the linux-raid list . Please see below . Hth , JimL

        http://www.cse.unsw.edu.au/~neilb/source/mdadm/

On Thu, 9 May 2002, Michal Jaegermann wrote:
> On Thu, May 09, 2002 at 04:16:56PM +0200, Jakob Østergaard wrote:
> > On Thu, May 09, 2002 at 04:11:00PM +0200, Roy Sigurd Karlsbakk wrote:
> > > hi
> > > How can I use more than 12 drives in a RAID config? I need it!!!
> > > Please cc: to me as I'm not on the list(s)
> > Yes.
> >
> > Back in the "old days" with the old superblocks you couldn't.
> Hm, the last time I looked a header used by kernels had space
> for someting like 27 or 29 drives (I do not remember the exact
> number) but its variant in 'raidtools' sources allowed indeed
> only 12. Synchronizing those headers to kernel values raised
> a maximum number of disks in an array quite considerably.
> Michal

       +------------------------------------------------------------------+
       | James W. Laferriere | System Techniques | Give me VMS |
       | Network Engineer | P.O. Box 854 | Give me Linux |
       | babydr@baby-dragons.com | Coudersport PA 16915 | only on AXP |
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