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- Newsgroups: comp.sys.mac.programmer
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!mips!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!uxa.cso.uiuc.edu!bts39313
- From: bts39313@uxa.cso.uiuc.edu (Benjamin T Sander)
- Subject: Re: Does mac exec code on disk when mounting it?
- References: <1992Jul20.223225.25800@random.ccs.northeastern.edu> <1992Jul22.070932.22863@metropolis.com>
- Message-ID: <Brt8uA.It7@news.cso.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Date: Wed, 22 Jul 1992 21:54:08 GMT
- Lines: 34
-
- robert@metropolis.com (Robert Munyer) writes:
-
-
- >In article <1992Jul20.223225.25800@random.ccs.northeastern.edu>
- >mharm@ccs.northeastern.edu (Michael Harm) writes:
-
- >> [...] on a mac, is there any code in the mount partition of a disk that is
- >> executed when the disk is mounted? I'm concerned that mounting the hard disk
- >> may introduce something into the ram. Or, is the act of mounting a drive
- >> simply reading numbers (number of cyls, sectors) from some area of the disk?
- >>
-
- The driver for the hard drive is stored on a partition on the hard drive.
- It gets loaded when the Mac is first powered on (before the shining face
- appears) regardless of whether you actually boot off that drive. The
- mac ROM loads the driver code and blindly jumps to it: THIS CODE COULD
- THEORETICALLY DO ANYTHING. Thus it is technically possible to
- have a virus which resides in the driver partition of your hardr
- drive; however, I have never heard of such a beast.
-
- Incidentally, if you screw up the driver on your internal disk (not
- that I have ever, say, done this), you are confronted with a machine
- that crashes 5 seconds after you turn it on no matter what you do.
- All this from software! I had to pop the case on my machine, unplug
- the drive cable from the motherboard, reboot the machine, plug the
- cable back in while the power was up, and then reformat the drive.
-
- Ben Sander
- University of Illinois
- bts39313@uxa.cso.uiuc.edu
-
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- t
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