RE: Data Corruption / 400

The only tiem I know of was on a 24x7 (hospital) S/38 that got hit hard
by lightning during a peak usage period.  After power restored system
took around 48 hrs to IPL (rebuilding access paths).  Once that was done
there were some (lee than 10 IIRC) damaged objects (user files) that had
to be srestored from tape.

Mark Allen
I.S. Manager
Wilkes Telephone & Electric
A Dycom Company
Phone: (706) 678-9565
Email: allenmark@nu-z.net
http://www.nu-z.net




:-----Original Message-----
:From: midrange-l-admin@midrange.com
:[mailto:midrange-l-admin@midrange.com] On Behalf Of MacWheel99@aol.com
:Sent: Monday, April 08, 2002 3:29 PM
:To: AS400 & iSeries & family discussion group;
:starbase_club@bigrivers.com
:Subject: Data Corruption / 400
:
:
:Has anyone EVER suffered data corruption on their 400 business
:data bases or ever heard of it happening for some reason other
:than failure of hard drives, damaged objects, human error,
:software bugs, PC user in middle of doing some update & the
:connection gets lost & the software was not written good
:enough to recover from that scenario, malicious activity like
:hacker or someone who lost their job & took improper action?
:
:Feel free to reply to me off list about this.
:
:I have a collegue who is in a heated discussion on in some
:list in the PC Windows Macintosh world.  They apparently take
:it for granted that reality is that there are operating system
:crashes all the time that scramble business data.  My friend
:says that in his many decades experience in the IBM world,
:this has NEVER happened there.
:
:These Microsoft enthusiasts are flatly disbelieving him ... it
:must be a fluke for him.  So he looking for a quick poll ...
:how many years experience someone in IBM 400 & its predecessor
:platforms & how many times has this happened to you?  So that
:he can then say to these guys ... well X people in the 400
:community who said they have Y aggregate years have only heard
:of this happening however many times.  So if it is a fluke,
:here is how many other people are having that fluke.
:
:In my personal over 40 years in this world, it has only happened once.
:
:We got our % disk space utilization significantly above 100 %
:by accident, during our Y2K conversion in 1998, primarily
:because our estimates for disk space needed for multiple
:Pilots & conversion efforts were too low, related to OS/400
:math being off on what the M36 was taking, a lot of stuff was
:weird.  We didn't care to spend any time figuring it out.  Our
:goal was to fix it & fast, which we did.  The problem was
:discovered one day.  We got it below 100% in less than 24
:hours, identified corrupted data & recovered it from our backups.
:
:I also remember a hard disk failure from old age ... it was a
:13 years old IBM hard drive & IBM's mean time to failure was
:10 years.  IBM helped us map the hole in the drive, so we
:could work around it, such as backups of everything except the
:software that straddled the hole.  No business data was lost.
:
:In 1984 at another employer there was a power outage that
:damaged some IBM OS objects on our hard drive, and damaged
:some parts of the hard drive.  This was on a S/34 at a 24x7
:company & it took a week for IBM to do the repairs. Basically
:the business continued running with us not doing some tasks
:like compresses, and 100% of the damaged objects were replaced.
:
:MacWheel99@aol.com (Alister Wm Macintyre) (Al Mac)
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