HP3000-L Archives

March 1995, Week 5

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
"Rudderow, Evan" <[log in to unmask]>
Reply To:
Rudderow, Evan
Date:
Fri, 31 Mar 1995 16:17:00 EST
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Doug <[log in to unmask]> wrote:
 
>Does anyone know the Mean Time Between Failure (MTBF) for
>Eagle(7937) drives. I lost a system drive Feb 18 and lost another one
>last tuesday. A year ago I lost two on the same day. I have nine
>Eagles and three old 7933s that just keep shaking along without any
>problems. I don't if I should feel good or bad about being able
>to install and reinit the system with a single reference to the System
>Manager books. (It is a warm feeling to recover from a crash during
>production without losing any data).
 
Some years ago I worked at a site which acquired an additional, brokered,
7933 just about every month.  The truly wonderful thing was that, in the
space of 19 months we had 26 drive failures.  It got so tired of dealing
with the failures that I called up the CE DM to ask him what  the MTBF was
for 7933s; he replied, "17,000 hours".  Well, I added up the number of 7933s
I had and, sure enough, they were failing about every 17,000 hours.
 
That was so reassuring...
 
 -- Evan

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