Re: disk bad block checking post-install / ext2

From: Peter T. Breuer (ptb_at_lab.it.uc3m.es)
Date: 01/12/05 

Date: Wed, 12 Jan 2005 00:37:43 +0100

mjt <mjtobler@removethis_mail.ru> wrote:
> Jean-David Beyer wrote:
>
> > But seriously, what maintenance are you supposed to do to a hard drive?
>
>
> ... it's probably not AS critical as it used to be.
> alot depends on the environment, ie, protecting the
> item containing the drive.

There is a factor of 10 in mtbf between 20C and 60C ambient. That's all
I can think of.

Of course it's a poisson distribution, so about 2/3 of disks will have
died by the time you get to the mtbf. The distro is asymmetric, with a
long tail, so the few long-lived drives count for a lot in the mean.
The geometric mean would be a little fairer. Think of the mtbf just
as the inverse of the probability of failure per unit time - that's
really what it is, not what you think of it as.

> maintenance. personally, i've been using the spinrite
> product for my maintenance chores in a proactive stance,

Eh? There is no such thing as disk maintenance - disk monitoring, yes.
But these things are sealed units.

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