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From: meier%isl@sri-unix.UUCP
Newsgroups: net.micro.cpm
Subject: none
Message-ID: <12338@sri-arpa.UUCP>
Date: Mon, 16-Apr-84 21:49:00 EST
Article-I.D.: sri-arpa.12338
Posted: Mon Apr 16 21:49:00 1984
Date-Received: Mon, 23-Apr-84 01:08:26 EST
Lines: 64

DUU and DU2 (with more features) are indeed excellent disk editors.
There is however one slight problem when dealing with disks with bad
sectors.  My BIOS and I assume most BIOS' trap errors and will not
return the data to DUU or DU2 if one is detected.  This leaves the
contents of the previous read in DUU's buffer.  I wrote quick and
dirty DDT routines to turn off error detection while attemting to
repair bad sectors  and then reenable error detection when I'm done.

NEVER!  "That's NEVER EVER try fixing a bad track by doing:
read..  write.. increment.. loop.    Fix those nasty little sectors
one at a time "manually".  I completeletely destroyed a directory by
doing the afforementioned "never ever".

The error handling/reporting by those programs "should" abort loops and
return error messages to the user.

Jesse (who knows more than one way to destroy a disk)

From: ABN.ISCAMS@usc-isid

DUU and DU are at SIMTEL20 via anonymous FTP (I think DUU is in the SIGM
files somewhere, and DU under disk utilities).  FINDBAD, which is supposed to
find and lock out bad sectors (by storing them in a file called BAD or
something like that) is also out there -- however I find it does not catch
all the errors, since I can run FINDBAD and still get BDOS errors. Donno
why.

If you need help FTPing from SIMTEL20, yell.

Regards,
David Kirschbaum

From: Eaton.HFED at HI-MULTICS <Eaton.HFED@HI-MULTICS>

Bob,  I don't know where you're located but if there is a local CP/M USERS
GROUP in the neighborhood that's the place to go for a wealth of CCP/M software.

There are two major CPM libraries; CPMUG and SIG/M. Of the two, SIG/M is now
the most active and all the new stuff is released in it.

Here is a list of disk manipulators you may be interested in:

DUU.*      CPMUG VOL 78
DU2.ASM    SIG/M VOL 108
DU2.COM    SIG/M VOL 108
DU2.HLP    SIG/M VOL 103   DU2.COM IS SELF DOCUMENTING AND REALLY NEEDS NO HELP
VFILER     SIG/M VOL 145
VERIFY.C   SIG/M VOL ?
Z80DISK    SIG/M VOL 140
DISK7      SIG/M VOL 127
FINDBAD    SIG/M VOL 86
CATALOG    SIG/M VOL 0   THIS DISK HAS A LIST OF ALL AVAILABLE CP/M SOFTWARE

If you don't have access to a user's group you can either send me a disk in a
SASE or you can call me at (612) 920-2115.  I have a modem at home running
MDM724 and could transfer the files to you if you like.

I have everything above but Z80DISK and DISK7.

Send me a message and let me know what you would like to do.

Have a fine day.      Jesse (Eaton.HFED@hi-multics) in Mpls, Mn.

P.S. My work number is (612) 830-3682.      Bye.........