Re: Whooda belived this?

["Tim Shepherd" <tims009@xxxxxxxxxxx>]

I'd also check your power supply, i.e. the source. We had a machine on a UPS
and had three crashes in 5 days. They were 9332 drives, which crashed if you
sneezed in the next office. They were over 5 years old and initially we just
put it down to wear and tear. It turned out that the cause was the local
electricity distribution for the area had a "floating earth" which was
spiking the disks through the earth. It only became apparent as another
AS400 customer down the road was having the same problem. We installed a
separate earth from the rest of the building and had no other problems
since.

Tim Shepherd

>From: "Neil Palmer" <neilp@dpslink.com>
>Reply-To: midrange-l@midrange.com
>To: midrange-l@midrange.com
>Subject: Re: Whooda belived this?
>Date: Tue, 18 Jun 2002 14:28:08 -0400
>
>Hmmm - wonder if these were the Seagate drives IBM is supposedly using in
>iSeries now ?
>Still, sounds like it was something other than the disks themselves that
>caused it if both appear to have failed at exactly same time.
>Have a customer with a new 270 in April (2248, V5R1, 5 x 8.58GB, RAID-5)
>been having a lot of problems - system crashing (but no apparent loss of
>data or drive damage).  They were blaming the twinax controller or wiring
>(customer previously had an F10, which started life as a B10 or B20 and
>was upgraded, so it was using teh older slower twinax controllers).  IBM
>replaced the backplane about 2 weeks ago.  Haven;t heard if that solved
>the problem.
>
>...Neil
>



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