hard disk failure

Matt Graham danceswithcrows at usa.net
Tue Feb 21 11:21:04 MST 2012


From: Michael Havens <bmike1 at gmail.com>
> If e2fs is saying that the first backup superblock is at 32768, why do
> you multiply it by 4 to get the real superblock backup location?

Because ext23 filesystems can have block sizes other than 4K.  In the old
days, when disks and files were smaller, there were some advantages sometimes
to having 2K or 1K blocks.  These advantages are mostly irrelevant now, but
the lowlevel filesystem code and tools MUST be able to deal with block sizes
that are not 4K for obvious reasons.

> Is that a bug?

Closer to "obsolete feature".

-- 
Matt G / Dances With Crows
The Crow202 Blog:  http://crow202.org/wordpress/
There is no Darkness in Eternity/But only Light too dim for us to see



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