• Subject: Re: 9406-S30 RAID config question
  • From: Larry Bolhuis <lbolhuis@xxxxxxxxxx>
  • Date: Fri, 26 Jan 2001 23:15:44 -0500
  • Organization: Arbor Solutions, Inc

I think Neil is correct but: 
 a) Why not just stick 'em in and Mirror 'em? You'll still get 4G more
space just as you would with two RAID sets since you lose another drive
to the new set. AND it'll be MUCHO faster to do that than to end and
restart RAID. AND you won't be exposed to a disk failure while RAID is
stopped.  
 b) Even after you've ended RAID on all drives for that controller it
still knows which drives were in what set(s). I have seen (just weeks
ago) where the controller would not put new drives in a RAID set because
of this, it just put back what it knew and ignored the new drives. We
had to remove drives from the system ASP, remove them from the system
physically (Forcing the controller to re-evaluate it's RAID sets), then
re-start RAID and it did just what we wanted. (Then put the removed
drives back in....)

 HTH

  - Larry

Neil Palmer wrote:
> 
> I believe if you stop/restart RAID it will configure a set of 8 and a set
> of 4.

> Hello all,
> another "what if" question:
> configuration is: 9406-S30 with 10x 4 GB (6907, two byte disks)
> and a 6532 SPD RAID-5 controller, currently configured as one RAID-set.
> Slots available for disks are 12 maximum in base unit.
> The 6532 is specified as capable of having 4 to 10 drives in one RAID-set
> and being able to have four RAID-sets attached.
> When adding another two 4GB drives of same type as above, do I have
> to form a second set, or just add them and they are running "side by side"
> ?
> When forming two sets of, lets say, 8 disks in set 1 and 4 disks in set 2,
> is it the right way to go to DST and stop RAID, select the first 8 disks
> to
> make up set 1, then start protection, then the same with the rest for set
> 2 ?

-- 
Larry Bolhuis
Arbor Solutions, Inc.
(616) 451-2500
(616) 451-2571 -fax
lbolhuis@arbsol.com
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