Corrupted disk labels

[cjl@ai.mit.edu (Chris Lindblad)]

    Date: Wed, 21 Feb 90 09:35:15 EST
    From: ptw@edvac.scrc.symbolics.com (Tucker Withington)

	Date: 21 Feb 90  3:29
	From: razzell%cs.ubc.ca@Warbucks.AI.SRI.COM (Dan Razzell)

	How does one recover from a corrupted disk on a standalone machine?
	Assuming just a few blocks are corrupted, and one of them happens to
	be the label block, what can be done from the FEP to repair them? Or
	do I have to reformat the whole thing?

	In Genera 7.2, the only useful FEP command is Disk Format, and it looks
	like a big hammer. Might there be something more graceful?

    The FEP label is replicated a number (like ~ 32) of times, so you must
    have more than a few blocks corrupted if you cannot boot Lisp.
    Assuming that only some of the label copies are damaged, you can
    rewrite them from Lisp.  Look at SI:EDIT-FEP-LABEL in
    FEP-SALVAGE.LISP.  

Only if you bought optional sources. SYS:L-SYS;FEP-SALVAGE is an optional
source, not a basic source.