How are alternate superblocks repaired?

Theodore Tso tytso at
Wed Oct 3 18:44:36 UTC 2007

On Tue, Oct 02, 2007 at 05:59:11PM -0400, Theodore Tso wrote:
> I'm a bit dubious about how useful simply structure matching would be
> for modern Linux systems, since a large number of errors really are
    sorry, I meant to say "filesystems", not "systems" above
> silent bit flips in the data, that wouldn't be detected simply by
> checking the expected structure ID at the beginning of the on-disk
> object.  We are planning on adding checksum to metadata for ext4,
> which will help a lot in terms of detected bad metadata.

  	     	    	   	 - Ted

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