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Fatal Disk Error urgency 
Date: Wed, 6 Jun 90 00:25 EDT
From: RWK@FUJI.ILA.Dialnet.Symbolics.COM (Robert W. Kerns)
How do I do that?
Unfortunately, Symbolics doesn't seem to distribute the source for
SI:FIX-FEP-FILE and SI:FIX-FEP-BLOCK, and I don't seem to have access
to *ANY* Rel-8 documentation (online or paper), so I can't tell you
what they are documented as doing, but disassembly suggests that
SI:FIX-FEP-BLOCK does exactly what you want, including testing and
analysis, and prompting you for the suitable recovery strategies.
These functions are documented in 8.0. They were not in 7.0. I have no
easy way to verify whether they were documented in 7.2, 7.3, etc.
SI:FIX-FEP-BLOCK does do exactly what PAN wants; I generally endorse
But I suggest reading its documentation first. (I couldn't find any
documentation in the 7.2 set, although I know SI:FIX-FEP-FILE existed
then, and I think it was even documented. I think SI:FIX-FEP-BLOCK
may be new to 8.0).
Nope. It's history has been completely parallel to SI:FIX-FEP-FILE, to
I don't know if SI:FIX-FEP-BLOCK performs the proper actions to
minimize damage to the file in which the block appears, but hopefully
the documentation will enlighten you. In general, world-load files which
get a bad block should be replaced, LMFS files should have a block of zeros
substituted, and paging files can just have the block removed (while the
file is not in use!)
The documentation states, and I agree, that for safety, you should never
use SI:FIX-FEP-BLOCK or SI:FIX-FEP-FILE on LMFS partitions. Instead,
use LMFS:FIX-FILE, which gives you the right pathname-based handles on
the file, and limits the options to those that are safe for the
integrity of LMFS partitions.