Subject: Re: Superblock backups
To: None <>
From: Ignatios Souvatzis <>
List: current-users
Date: 08/14/1999 18:51:55
On Sat, Aug 14, 1999 at 10:22:08AM -0400, Bill Sommerfeld wrote:
> > Just to be sure - ffs won't do updates on all this blocks everytime the 
> > filesystem is unmounted? Or even at sync time? 
> Correct.  The backup superblocks just contain filesystem geometry
> information.
> > I understand this block is important, but are thousands of copies
> > realy necessary?
> No, but it's more an irritant than something really broken.

Actually, as each of them is at the start of a cylinder group, you can 
resurrect at least part of your data even if the original superblock and
all but one of the cylinder groups are damaged.

This might have been the idea when the copies where put there.