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From: briand@tekig4.TEK.COM (Brian Diehm)
Newsgroups: comp.sys.mac
Subject: Re: Hard disk problem
Message-ID: <2003@tekig4.TEK.COM>
Date: Mon, 5-Oct-87 15:12:29 EDT
Article-I.D.: tekig4.2003
Posted: Mon Oct  5 15:12:29 1987
Date-Received: Thu, 8-Oct-87 06:46:54 EDT
References: <450@aucs.UUCP>
Reply-To: briand@tekig4.UUCP (Brian Diehm)
Distribution: na
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 32

>I am having a strange hard disk problem.  A program I was running crashed
>with an ID=02 just as I was quitting.  After rebooting, the hard disk
>was no longer visible and I had to boot from floppy.  Disk First Aid
>repaired the problem and all the files seem intact.  However, the mac
>SE will no longer boot from the hard disk.  I've replaced the system
>folder but no change.  Any ideas?  I don't want to reformat :-(

This happened to me once.  While you now have a hard disk with a proper system
and finder on it, your boot block 0 on the hard disk has been trashed.  Ergo,
the system does not recognize it at boot time, and your disk is not a start-up
disk.

Not to worry.

Whenever a system is copied onto a disk THAT DOES NOT ALREADY HAVE A SYSTEM on
it, it recreates the boot block.  Simply remove the system and finder from that
hard disk (saving it elsewhere if you wish).  Reboot to be sure, but I'm not
sure this matters.  Then, copy the system back onto the hard disk, and make the
finder the start-up application on that disk (also probably not necessary).

Now, I'm not 100% certain of that sequence.  The point is, the problem descrip-
tion is accurate, and there exists a methodology short of reinitializing the
entire disk.

If your disk is a DataFrame, then SuperMac's help phone will probably be able
to walk you through this - they did for me and I was VERY appreciative.


-- 
-Brian Diehm     (SDA - Standard Disclaimers Apply)
Tektronix, Inc.
briand@tekig4.TEK.COM   or  {decvax,cae780,uw-beaver}!tektronix!tekig4!briand