[Info-vax] INDEXF.SYS

[VAXman- at SendSpamHere.ORG]

In article <51eb1bfe-7583-4b10-a0ba-2ef162e333c1 at o14g2000vbo.googlegroups.com>, hb <becker.avd at gmail.com> writes:
>On Jan 28, 1:02=A0am, JF Mezei <jfmezei.spam... at vaxination.ca> wrote:
>
>> INDEXF doesn't know what directory the
>> file is in.
>
>Kirby McCoy (1990), VMS File System Internals, Digital Press, ISBN
>1-55558-056-4 page 28:
>FH2$W_BACKLINK - Back link file ID. ... It contains the file ID of the
>directory file ...
>
>dump/header shows it as
>    Back link file identification:        (131439,82,0)

It knows then the file is in a directory but this is NOT maintained
if ANALYZE/DISK/REPAIR is used.

$ SET DEF DSA1:[000000]
$ CREATE/DIRECTORY [MISSING_DIRECTORY]
$ SET DEFAULT [MISSING_DIRECTORY]
$ COPY NL: MISSING_FILE.TXT
$ DUMP/HEADER/BLOCK=COUNT=0 MISSING_FILE.TXT
Dump of file DSA1:[MISSING_DIRECTORY]MISSING_FILE.TXT;1 on 28-JAN-2012 06:46:12.53
File ID (9443,4,0)   End of file block 0 / Allocated 0

                             File Header

Header area
    Identification area offset:           40
    Map area offset:                      100
    Access control area offset:           255
    Reserved area offset:                 255
    Extension segment number:             0
    Structure level and version:          2, 1
    File identification:                  (9443,4,0)
    Extension file identification:        (0,0,0)
  :
  :
    Back link file identification:        (9419,4,0)
  :
  :
$ SET FILE/NODIRECTORY MISSING_DIRECTORY.DIR
$ DELETE MISSING_DIRECTORY.DIR;
$ ANALYZE/DISK/REPAIR DSA1:
$ ANALYZE/DISK/REPAIR DSA1:
Analyze/Disk_Structure/Repair for _DSA1: started on 28-JAN-2012 06:48:43.88

%ANALDISK-I-OPENQUOTA, error opening QUOTA.SYS
-SYSTEM-W-NOSUCHFILE, no such file
%ANALDISK-W-LOSTHEADER, file (9443,4,0) MISSING_FILE.TXT;1
        not found in a directory
$ SET DEFAULT DSA1:[SYSLOST]
$ DIRECTORY

Directory DSA1:[SYSLOST]

MISSING_FILE.TXT;1  

Total of 1 file.

$ DUMP/HEADER/BLOCK=COUNT=0 MISSING_FILE.TXT
Dump of file DSA1:[SYSLOST]MISSING_FILE.TXT;1 on 28-JAN-2012 06:50:45.94
File ID (9443,4,0)   End of file block 0 / Allocated 0

                             File Header

Header area
    Identification area offset:           40
    Map area offset:                      100
    Access control area offset:           255
    Reserved area offset:                 255
    Extension segment number:             0
    Structure level and version:          2, 1
    File identification:                  (9443,4,0)
    Extension file identification:        (0,0,0)
    VAX-11 RMS attributes
  :
  :
    Back link file identification:        (9419,5,0)
  :
  :


I think that the OP is trying to figure out a [SYSLOST] directory full of
files.  Since the backlink is now that of the [SYSLOST] directory, that's
not going to help.  The proper thing to do would first be ANALYZE/DISK to
find the files not found in a directory.  Then collect the backlinks from
the headers of these files BEFORE doing an ANALYZE/DISK/REPAIR.  That way
there is a way to create some relationship amongst the files collected by
the /REPAIR.

-- 
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

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