Re: RAID: identical disks?

Previously Peter <peterfoxghost@xxxxxxxx> wrote:
>> Where does one find an "expected service life" rating?

> Manufacturer's website.

> WD - search for "component design life" for IDE, "service life" for SCSI.
> Maxtor - search for "component design life"

Generally it is 5 years for electronics. The design lifetime is
the time when the failure rate starts to increase significantly.
Before that it is directly related to the MTBF.

> In general, I'm sure that "average service life" of deployed hard drives
> exceeds those numbers, but I'm not aware of anyone publishing those results.
> Businesses should not run hard drives longer than warranty states.

I do not agree. You cretainly can run any drive up to the
design lifetime, since only afterwards will you get an increased
risk. Businesses should however have a current backup and likely
should use RAID1 or RAID5 on all disks where a disk failure
would cause significant recovery effort.

Arno

.

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