RE: Hard drive failures

Jeff,

I'd rethink that RAID-6 with the types of controller cards you have. My
guess is I/O is going to be problematic. As part of that decision make sure
you do some real accurate forecasting of disk performance. New higher end
controllers on the P7+ no problem with RAID-6, I have several customers
running it without so much as a whisper. Your business partner ( or many
of us on the list ) can do that work with the software from MPG.

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Crosby
Sent: Tuesday, February 25, 2014 7:30 PM
To: Midrange Systems Technical Discussion
Subject: Re: Hard drive failures

Back home now having a Barley Pop.

All good information in these posts. Keep them coming.

I have several quotes pending. Those involving IBM i are:

1) short term - going to Raid 6
2) longer term - power 7/8 or cloud



On Tue, Feb 25, 2014 at 8:02 PM, Steinmetz, Paul
<PSteinmetz@xxxxxxxxxx>wrote:

On our old Power5 9406-550
36 4328 drives - 1 failure from Nov 2005 to Feb 2013, and that drive
failed gradually over a 2 month period. 8/15/11, failed on 10/8/11.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Holger Scherer
Sent: Tuesday, February 25, 2014 7:20 PM
To: Midrange Systems Technical Discussion
Subject: RE: Hard drive failures

Depends...

our internal statistics on older boxes:

- 73 drives 6717 (!) on old boxes - no failure in the last 12 months
- 168 drives 6718 on old boxes - 1 failure in the last 12 months
- 40 drives 6719 on old boxes - 8 failures in the last 12 months
- 180 drives 4326 on aged boxes - 1 failure in the last 12 months
- 168 drives 4327 on i5 boxes - 9 failures in the last 12 months
- 84 drives 4328 on i5 boxes - 3 failures in the last 12 months

drives in Power6 boxes and newer: <1% of failing drives in 12 months.
Nothing to worry about.

The old 6717 are rock-solid unless you power them down. And yes - we
run a lot of old customer boxes for archive purposes. Old software
forces them to
:-)

-h

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Oberholtzer

Age. Your mean time between failure date on those drives has long
since passed.




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--
Jeff Crosby
VP Information Systems
UniPro FoodService/Dilgard
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531
www.dilgardfoods.com

The opinions expressed are my own and not necessarily the opinion of my
company. Unless I say so.
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