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Date:      Tue, 5 May 1998 23:00:25 -0700 (PDT)
From:      Tom <tom@sdf.com>
To:        Terry Lambert <tlambert@primenet.com>
Cc:        beng@lcs.mit.edu, freebsd-hackers@FreeBSD.ORG
Subject:   Re: Network problem with 2.2.6-STABLE
Message-ID:  <Pine.BSF.3.95q.980505225338.24411B-100000@misery.sdf.com>
In-Reply-To: <199805060123.SAA20824@usr02.primenet.com>

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On Wed, 6 May 1998, Terry Lambert wrote:

> >   Anyhow, basically any kind of restore operation (restore -t, or
> > restore -r) results in an immediate "hole in map" response, with a "abort?
> > [yn]" prompt, and then about three seconds later, a segmentation fault.
> 
> 
> I think you need to read the man pages.

  In what man page is "hole in map" mentioned?

> A hole in a map won't happen unless you have bad media.  If you
> traceback the panic in the source code, you'll see that the problem
> is a zero-valued block map.

  Question:  why does it segfault several seconds after producing the
"abort?" prompt?  It had already detected the "hole in map" problem?
Regardless this is still a bug, even assuming that the media is bad (it
isn't, as I did a full backup and restore to the media with tar).

...
> You can ignore your damaged media using the "-y" option to restore:

  Doesn't do anything in this case.  A "restore -t -v -y" tells me that
every file (at least those I bother to let it read) had CRC errors.  That
isn't right, as I can use the same tape to do a full tar and untar with no
problems.

> 	-y      Do not ask the user whether to abort the restore in
> 		the event of an error.  Always try to skip over the
> 		bad block(s) and continue.
> 
> It is recommended that you, instead, fix the underlying problem.

  What is that?  The only thing you've said, is bad tape.  But it isn't.
Next.

> 					Terry Lambert
> 					terry@lambert.org
> ---
> Any opinions in this posting are my own and not those of my present
> or previous employers.

Tom


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