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- Path: sparky!uunet!pageworks.com!world!eff!sol.ctr.columbia.edu!destroyer!news.itd.umich.edu!potts
- From: potts@oit.itd.umich.edu (Paul Potts)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: How do you make a master disk?
- Date: 13 Nov 1992 17:19:53 GMT
- Organization: Instructional Technology Laboratory, University of Michigan
- Lines: 32
- Message-ID: <1e0o3pINN6hl@terminator.rs.itd.umich.edu>
- References: <1992Nov11.161005.23758@kth.se> <15352@claris.com>
- NNTP-Posting-Host: helen.oit.itd.umich.edu
-
- In article <15352@claris.com> James_Zuchelli@qm.claris.com (James Zuchelli) writes:
- >In article <1992Nov11.161005.23758@kth.se>, petrus@stacken.kth.se (Lars Petrus) writes:
- >>
- >>
- >> Some software products are sold on disks that can not be copied - or so
- >> I'm told. This means that you can have an installer program on that disk,
- >> and only allow a limited number of installations from that disk.
- >>
- >> But I can not see any way that this can be accomplished. If you copy a disk
- >> you copy every byte of is, and thats that.
- >>
- >> Any ideas?
- >>
-
- In the bad old days of the Commodore-64, which had a programmable floppy
- drive, companies would ship disks with specially written tracks that gave
- different types of sector and track errors when read. Then hackers came up
- with their own schemes to duplicate these bad sectors by programming the
- drive to write bad sectors... and companies came out with disk cracking
- programs that would sense the bad sectors and tracks and re-create them,
- software developers came up with even more nefarious schemes... etc.
-
- I'm glad those days seem to be gone... I once had to install some software
- on a Mac from a disk that allowed a limited number of installs (some kind
- of DNA sequencing program). Of course, the installer was buggy, though, and
- so would crash halfway through an installation, but still tell you that
- you had "used up" one of your installations. This was a big pain. We didn't
- wind up doing any more business with that vendor.
-
- --
- Politics is crime pursued by other means.
- potts@oit.itd.umich.edu CI$ 71561,3362 (rarely)
-