Re: RAID question

[Larry Bolhuis <lbolhui@xxxxxxx>]

Al Barsa, Jr. wrote:
> 
> I respectfully disagree.  I originally purchased an S10 with 5 4 GB drives.
>  The parity was equally spread over all 5 drives.  I then purchased another
> 5 4GB drives, and it set up another parity set!  (So I was now wasting two
> full drives for redundancy.)  When I meekly and mildly expressed my
> disappointment to Rochester (No, not the man that used to polish Mr.
> Benny's car.) I was informed that if I added less than four drives at a
> time, they would have been added to the same parity set, but four or more
> went into their own parity set.  To recoup the lost space, I had to end
> RAID and restart it.  The system then put the parity on the first eight
> drives, so I only lost one for redundancy.
> 
> Al

  Al,

  I just installed an S20 Wednesday with 20 drives.  (Configured for
another 10 to be migrated in from the machine it is replacing.)  The
drives came from Rochester in a set of 10 (8 striped plus 2) a set of 6
(4 striped plus 2) and a set of 4 (striped). I think this to be a wierd
setup but it was explained to me by the CE that there would be three
raid sets with 10 each when done. (Why not 10(8+2) for each set I don't
know). I don't believe there has ever been the capability to have other
than 4 or 8 drives containing the RAID striping.

  Larry Bolhuis
  Arbor Solutions, Inc
  lbolhui@ibm.net
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