How to use apple cd-rom drive?
Michael Glenn
I've been told by several people that it is possible to use an apple
cd-rom drive to read the 3.0 disk. I've tried, and get nowhere. From
within the "disk" utility, I get the following:
disk name: SONY CD-ROM CDU-8002
WARNING: device sector size (2048)incompatable with DEV_BSIZE 1024
disk type: removable_rw_scsi
Well, it isn't a rw device, so it already goofed up. Do I need a disktab
entry to handle the drive? And if so, what should it be?
Whenever I insert the cd, it says "External disk is unreadable, ignore or
initialize?"
I *hate* it when people say "it just works". For me, it never does. :(
fer...@fermat.dartmouth.edu (NeXTmail welcome)
Paul S. Sears
fer...@fermat.dartmouth.edu (Michael Glenn) writes:
=>
=>I've been told by several people that it is possible to use an apple
=>cd-rom drive to read the 3.0 disk. I've tried, and get nowhere. From
=>within the "disk" utility, I get the following:
=>
=>disk name: SONY CD-ROM CDU-8002
=>WARNING: device sector size (2048)incompatable with DEV_BSIZE 1024
=>disk type: removable_rw_scsi
=>
This will happen if you are trying to read the 3.0 disk on a 2.xx system. You
cannot read the disk on an unmodified 2.xx system regardless of the cd-rom
drive (hardware is irrelevant). period. Use the upgradeprep.app on the
floppy to upgrade your kernel to handle 2K sectors...
=>Well, it isn't a rw device, so it already goofed up. Do I need a disktab
=>entry to handle the drive? And if so, what should it be?
=>
It is as far as 2.xxx is concerned. It doesn't know anything about the NeXT's
4.3 bsd fast filesytem like binary 3.0 CD (whew, what a mouthfull!)...
=>Whenever I insert the cd, it says "External disk is unreadable, ignore or
=>initialize?"
=>
=>I *hate* it when people say "it just works". For me, it never does. :(
=>
"It just works" if you are reading the disk on a 3.0 system.
=>fer...@fermat.dartmouth.edu (NeXTmail welcome)
--
Paul S. Sears * se...@uh.edu (NeXT Mail OK)
The University of Houston * sugge...@tree.egr.uh.edu (NeXT
Engineering Computing Center * comments, complaints, questions)
NeXT System Administration * DoD#1967 '83 NightHawk 650SC
>>> SSI Diving Certification #755020059 <<<
"Programming is like sex: One mistake and you support it a lifetime."
mod...@liveware.com
fer...@fermat.dartmouth.edu (Michael Glenn) writes:
>
I got this from my Apple SC CD-ROM drive
stout# disk -s /dev/rsd1a
NOTE: This device's block size (2048) is too big to coerce to DEV_BSIZE (1024).
You won't be able to use it with software versions earlier than Release 3.0.
disk name: SONY CD-ROM CDU-8002
disk type: removable_rw_scsi
stats: invalid request for type removable_rw_scsi
So indeed it is a rw scsi device (NOT)... I wouldn't mind knowing
what the deal is... Seems like your drive and mine are similiar. Is
yours a 541-22 (or something like that) mechanism...? I hate to say
this, but mines works and works well...
Bill Williams
the Sony 8002 CD-ROM device to enter a 512 or 1024 byte logical byte block
transfer mode you could do it via a simple program utilizing the generic
SCSI driver. The program would merely have to do a mode sense command "1A"
with 0 pages selected and then alter the bytes in near location 8 of the
returned data from a value of 800h to 200h. This data is then rewritten
using the SCSI command MODE SELECT (15h). At this point, assuming a CD-ROM
medium was inserted the device is fully addressable as a 512 byte device
(useful for some purposes, such as Mac HFS)
This is merley conjecture, since I haven't done this on a NeXT before, but
have done it on other computers.
Bill Williams