Re: Master Directory Block Trashed

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Article #15035

#15035

From: mp1w#
Date: Fri, 13 Mar 1987 18:42

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Since I made my request for recovering an 800K HFS 
disk with trashed Master Dir Block I have gotten a few 
suggestions.  The disk is completely readable (ie no bad 
media) but evidently the format of the block is bad.  
Most have either suggested using MacTools or Disk 
1st Aid.  I tried MacTools (V6.2) and all it did was wipe 
the directory and declare the disk empty.  Big help.  Disk 
1st Aid (V1.0.1) Started to read the disk, and then said 
"Can't open the disk" or something similar.  I checked 
the tech note called 'HFS Ruminations' but it was of little 
help.  I could not bitcopy the disk, because Copy ][ gets 
its information on whether a disk is single or double sided
 from the Master Dir Block, and on the trashed disk, Copy 
][ thought it was singled sided, so all the copies I  made 
to work on were straight sector copies.  I'm still looking 
for help, and would really like to know what is contained 
in the Master Directory - is it the top level dir, or just a 
special empty dir that points to the real top level?

			Marc Pawliger
			mp1w@andrew.cmu.edu
			mp1w@cmuccvma.bitnet

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From: mp1w#@andrew.cmu.edu.UUCP
Newsgroups: comp.sys.mac
Subject: Re: Master Directory Block Trashed
Message-ID: <4UK5=sy00WE=1T80GY@andrew.cmu.edu>
Date: Fri, 13-Mar-87 13:42:00 EST
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Posted: Fri Mar 13 13:42:00 1987
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