umount, and SunOS 3.X

[David Robinson]

In article <13448 at mimsy.UUCP>, chris at mimsy.UUCP (Chris Torek) writes:
< In article <520 at cra2.apctrc.UUCP> zjat02 at apctrc.UUCP (Jon A. Tankersley)
< writes:
< >rc.boot trashes /etc/mtab before running /etc/umount -at nfs.  This leaves
< >potential garbage on remote systems /etc/rmtab (remote mtab).
< 
< It does more than just that.  rc.boot is always run, even on a single-
< user boot.  If your root file system gets corrupted---and as most of us
< know, anything that *can* go wrong *will* go wrong (someone at Sun
< seems to have forgotten)---the code that clobbers /etc/mtab will cause
< a continuous series of crashes and auto-reboots.  The only way to
< recover is to boot from another machine, or from the distribution
< tapes.  But if this is the first machine on your network, or the only
< one with source . . . ?  (Praise to Aule for mini-roots.)

Or you could use the totally undocumented "-b" option to cause the
Sun to boot without running /etc/rc.boot and hope you are not
too corrupted.

-- 
	David Robinson		elroy!david at csvax.caltech.edu     ARPA
				david at elroy.jpl.nasa.gov	  ARPA
				{cit-vax,ames}!elroy!david	  UUCP
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