In article <[log in to unmask]> [log in to unmask]
writes:
 
> 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).
 
From memory, the life expectancy was somewhere about 30-50K Hours -
but this figure is only a guide.
 
From experience (and this is why we read the group isn't it) our
Eagles were at the end of their operational life when we migrated to
the 937 (and it's SCSI disks) 6 years after the Eagles were installed.
 
Power Cycling (when we lost a XP controller only to find the nearest
spare was a next day delivery) and Air Conditioning malfunctions tended
to shorten their life somewhat from the norm.
 
We actively replaced our 7933XP drives with Eagles in 1991 after a run
of track sparing on 2 of the drives - I'd rather plan my downtime...
 
Naturally, your requirements are different from mine,
 
Paul
 
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