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- From: jurban@uoft02.utoledo.edu
- Newsgroups: comp.unix.sysv386,comp.unix.wizards
- Subject: CD-ROM Drivers anywhere?/(PC) SysV.
- Message-ID: <1992Sep1.120549.9797@uoft02.utoledo.edu>
- Date: 1 Sep 92 12:05:49 EST
- Organization: University of Toledo, Computer Services
- Lines: 56
-
- It was suggested by a friend that I ask, if anyone out here has or
- knows of anyone, who's written cd-rom drivers for (PC) SysV.
-
- I'm myself new to Unix.
-
- Just below's an excerpt from a response I received this morning:
-
- ----------
-
- CD-ROM seems to be somewhat neglected in the SysV world, while Sun
- has had it for several years (could be less, I'm not sure). I'm a
- bit surprised by this (heck, people are writing serial drivers and
- SLIP/PPP, why not CD-ROM?) but I suppose it stems from there not
- being much of interest for SysV people on CD ... the stuff appears to
- be of a non-computational nature and this addresses itself to the
- ``creative'' SunOS/Mac users, not SysV/MSWindows/DOS ``business''
- users. However, this is a poor excuse and I'd be surprised if we
- don't have CD-ROM drivers in less than a year.
-
- Try asking on comp.unix.sysv386 or comp.unix.wizards (make sure you
- specify that you're talking (PC) SysV in the latter group, UNIX is
- a lot more than SysV and SunOS/BSD) and let me know what they say.
- I'd like to find out too.
-
- > At this time there is no support for CD Rom file systems. You could
- > read and write to the raw device
-
-
- [...an excerpt from Dell's Support - I'm using Dell's latest.]
-
-
- ``read'' is correct, but ``write'' must be a slip of the mind ...
- no-one has accomplished writing to a non-erasable CD-ROM :-)
-
- Reading/dumping the raw device should be possible but you'd have one
- helluva time doing a linear search along a 600MB file. Actually, it
- shouldn't be too difficult (for a C hacker) to write a program that
- simply read the CD-ROM once, extracted the file-system information
- and built an index in a disk-file (those indices simply being
- seek-offsets from the start). It would require knowing how a CD-ROM
- file system was put together, though, but it's a very simple,
- rudimentary system, much like DOSs. Again, I'm surprised no-one has
- done it ... it would enable you to extract the files from the disc
- much as you do with tar from a floppy, only a lot faster. I'm
- getting some low-level system books on V.4 in a week or so, if you
- don't get anything out of the newsgroups I'll see if the books
- contain any hints or suggestions.
-
- ----------
-
- I'd very much appreciate any comments, suggestions - either here
- or as e-mail directly to me.
-
- Thanks,
-
- Joseph jurban@uoft02.utoledo.edu
-