Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!pasteur!ucbvax!ucsd!rutgers!mcnc!ecsvax!joeld
From: joeld@ecsvax.uncecs.edu (Joel Dunn)
Newsgroups: comp.sys.ibm.pc
Subject: Re: backup/restore
Summary: 3.3 Restore WILL process 3.1 backups
Keywords: backup restore xt at pc os dos mdos etc.
Message-ID: <5428@ecsvax.uncecs.edu>
Date: 19 Jul 88 12:18:11 GMT
References: <4808@killer.UUCP> <36362@linus.UUCP>
Distribution: na
Organization: UNC-Chapel Hill ADP
Lines: 35

In article <36362@linus.UUCP>, jcmorris@mitre-bedford.ARPA (Joseph C. Morris) writes:
> In article <4808@killer.UUCP> bobc@killer.UUCP (Bob Calbridge) writes:
- >           She repeatedly go an error message on the restore cycle stating
- >that the "source does not contain backup files."  Since the only files on
- >the disk were "backup.001" and "control.001" this seems to be incorrect.
- >Is there something inherently incompatible with the two systems?  Could it
- >be  a difference between the two versions of BACKUP and RESTORE? 
- 
- Exactly.  The DOS 3.3 BACKUP disk format changed; in previous versions one
- DOS file was written for each file being backed up; in the new format there
- is a data file (backup.nnn) and a control file.  Since you apparently
- generated the backup using DOS 3.3 you'll have to use the same level to
- do the restore.  I don't know if you can use a 3.3 RESTORE under an earlier
- version of DOS.
- 
- ... problems with old restore deleted ...
-
- Also...remember that the files are stored with not only the file name
- and extention, but also the path used to access them.  RESTORE will restore
- the files only on the identical path.  You cannot, for example, BACKUP a
- file 'c:\one\two\sample.dat' and RESTORE it to 'c:\three\sample.dat' since 
- paths aren't the same.

It is possible to use PCDOS 3.1 Backups with PCDOS 3.3 Restore.  I did this
myself just a couple of months ago.  It is important, though, to make sure that
the path agrees, as Mr. Morris suggests.  If the path does not agree, you will
receive a number of strange error messages.  I thought at first I would not be
able to use my backup, but I tried a few more times and finally realized that 
my problem was that since I was using a friend's machine, I was trying to put
my data into directories that did not correspond with the original names.

-- 
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Joel Dunn, UNC-CH ADP, 440 W. Franklin, Chapel Hill NC 27514
{backbone}!mcnc!ecsvax!joeld      Bitnet: RJD@UNC
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