Re: anoconda

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On Thu, Jan 02, 2003 at 12:11:36PM -0800, Jesse Keating wrote:
> On Thu, 2 Jan 2003 14:06:39 -0600
> Ed Wilts <ewilts@ewilts.org> wrote:
> 
> > Secondly, you don't really want to mark out bad blocks, you want to
> > replace the drive. I have yet to see a drive that has lasted for any
> > period of time with bad blocks marked - all have been indicative of a
> > pending hard failure, and I've been mananging systems for 20+ years.
> 
> This is pretty misleading, since every harddisk made comes from the
> factory w/ bad blocks.  Yes, if you start seeing more bad blocks show
> up, you've got problems, but the the very fact that bad blocks exist
> doesn't mean that your disk is bad.

Given the experience level of the poster, the very fact that he's 
*seeing* bad blocks means that he's seeing bad blocks that have appeared
since the drive was certified at the factory.  

I remember when disks actually came from the factory certified
error-free and *any* bad blocks rendered the platters bad.  Later on,
manufacturers started shipping disks with a piece of paper listing all
the known bad blocks.  We then saw disks that allocated some spare
blocks and automatically revectored bad blocks to a spare block so that
all disks always looked contiguously perfect.  Today, if you're seeing
bad blocks, that means that new blocks have appeared since it was
shipped from the factory.  If you can actually see the factory bad
blocks, then you're likely smart enough to know how to deal with them.
What the original poster saw was new bad blocks, and I stand by my
comment that he's only delaying the failure of his drive (and it could
by days or weeks).  If he reintializes his file system later and forgets
to rerun the badblocks utility, he'll very likely lose data.

-- 
Ed Wilts, Mounds View, MN, USA
mailto:ewilts@ewilts.org
Member #1, Red Hat Community Ambassador Program



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