RH9 & direct cd's

warheros · 07-05-2003, 09:36 PM

is it possible to read direct-cd's made in windows through linux? i have rh9. and i mean direct-cd's that arent closed/finished.

i try this:

Code:

# modprobe udf
# mount -t udf /dev/cdrom1 /directory

and it tells me:

Code:

mount: block device /dev/cdrom1 is write-protected, mounting read-only
mount: wrong fs-type, bad option, bad superblock on /dev/cdrom1, or too many mounted file systems

so, my question is, is what im trying to do possible? if so what do i do to do so?

Electro · 07-05-2003, 10:14 PM

Try
mount /dev/cdrom1 /directory

Redhat should be smart enough and pick the right filesystem for your CD. Make sure you make the directory first before mounting it. If its an audio CD, you can not mount it.

warheros · 07-05-2003, 11:05 PM

thanks for the reply, this is what i got from doing that:

Code:

/dev/cdrom1: invalid argument
mount: block device /dev/cdrom1 is write-protected, mounting read-only
/dev/cdrom1 invalid argument
mount: you must specify the filesystem type

and i know audio cd's cant be mounted. when i load in the cd, it brings up a gui file explorer window opening the cd to "///burn:" and shows nothing in it. i read up on that, and it says it does that when you put a blank disc in you can drag and drop stuff to it. but i know the disc isnt empty.

warheros · 07-06-2003, 06:11 PM

*bump*

zmedico · 07-06-2003, 08:40 PM

Direct-cd's work fine for me. Are you sure the cd isn't already mounted (check /proc/mounts)? I've only used it with cdrw, are you using cdr?

You can even record on direct-cd's if you patch your kernel. It works well on mine.

warheros · 07-08-2003, 06:02 PM

it's not already mounted.

zmedico · 07-08-2003, 06:16 PM

Can you mount normal iso9660 filesystems using the same device? Have you tried more than one UDF formatted cd?

I've heard you can test the filesystem with this:
UDF Verification Software

BTW, if your interested in CDRW write support you can get your kernel patches here and the udftools here. Format UDF version 1.5 (like this: "cdrwtool -d <device> -v 0x0150 -q") if you want windows to be able to use it.

warheros · 07-08-2003, 09:04 PM

they dont have my patch for my kernal version. and, i think it doesnt work because the cd isnt actually formated to udf until you choose to do so. because when you do format it, you cant write anymore to it using the direct cd, am i correct? therefore, i cant open it using udf in rh9.

have not tried opening iso6990 cd's.

zmedico · 07-08-2003, 11:12 PM

Quote:

Originally posted by warheros
they dont have my patch for my kernal version. and, i think it doesnt work because the cd isnt actually formated to udf until you choose to do so. because when you do format it, you cant write anymore to it using the direct cd, am i correct? therefore, i cant open it using udf in rh9.

No, that's not how it works with cdrw (I don't know about cdr). The cd must be formatted with a UDF filesystem before data is recorded on it. Then it behaves much like any other writable filesystem. I'm not aware of anything you would need or want to do to it to make it unwritable.

Quote:

Originally posted by warheros
have not tried opening iso6990 cd's.

If you haven't successfully mounted any cd's then the problem is probably the device you're trying to use (/dev/cdrom1). Maybe /dev/hdb, /dev/hdc, /dev/scd0, /dev/scd1, or something will work.

warheros · 07-10-2003, 04:16 PM

you must close the cd before it can be read in linux. i figured it out. and once you close it, you cant write to it anymore. which kind of messes some things up for me. but anyways, thanks for all the help, i figured it out finally.

zmedico · 07-10-2003, 05:09 PM

That's a cdr then, right? I never encountered any such behavior with cdrw.

warheros · 07-10-2003, 08:09 PM

cdr, hence the name cdrw, re-write.

scottpioso · 08-03-2003, 12:45 PM

Hi Guys,

I know that it has been some time since anyone put a reply in this forum, however, I'm confused by what someone said. I have a CDR that I wish to be able to read in Linux but I cannot. I need a UDF reader installed to be able to read a CD that I made from Windows using Roxio. I closed the CD but I still cannot read it.

Anyone know what I have to do? Thanks.

zmedico · 08-04-2003, 02:18 AM

It seems like warheros had success reading an MS Windows UDF CDR with linux, after the CDR was closed. Did you try something like "mount -t udf /dev/cdrom /mnt/cdrom" and get the error "mount: wrong fs type, bad option,
bad superblock on /dev/cdrom, or too many mounted file systems"?

scottpioso · 08-04-2003, 06:35 AM

Yes, I believe that is what I got yes.