disk scrubber for Linux?

[Bill McGonigle]

On Dec 8, 2005, at 16:35, Michael ODonnell wrote:

> to detect bad blocks with
> the hope that you can do something about them before the
> situation becomes critical.

Somebody recently wrote (here, I think) that modern disks allocate 
spare blocks for every sector, spare sectors on each track, and 
automatically remap bad blocks while there are spares left, so by the 
time you see a bad block, you're in pretty deep.  Which is why Tom 
pointed to SMART tools.  I suppose once this starts to happen is when 
you see "drive failure imminent warnings".

>  This is of particular interest
> with mirrored disks because bad blocks can silently render
> your supposedly fault-tolerant kit, um, less so...

What happened?  This is exactly why you have a mirror.  Linux RAID 
handles this fine, in my experience.

-Bill

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