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Old 04-17-2002, 10:17 AM   #1
handcock
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USB CD-Writer


My CDR drive is not reading the disks that I wrote to from my CD-RW drive(from Win2000). Saying that it's empty. I'm trying to read them from the CD-RW device itself. I'm running RH7.2 and I believe it loaded the drivers for my HP 8200e CD-RW. However, I've been trying to mount it and can't figure out what device it is. Would it be under USB? Anyway, I think I could figure out what to do if I could either get which device it is or where the lilo boot log is saved. Thank in advance.
 
Old 04-17-2002, 12:23 PM   #2
Thymox
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I'm only stabbing in the dark, here, but I'd guess that you'd need a couple of drivers.

Most USB storage devices require the usb-storage (and possible scsi) modules. You could try modprobing for them and see what happens. If it works, the device you would be looking for is probably going to be /dev/sd?.

<edit>Where are my manners? Welcome to LQ.</edit>
 
Old 04-17-2002, 03:25 PM   #3
handcock
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Thanks Thymox. This site has been very helpful so far.

I have the usb-storage.o module. I did a usbview on the command prompt and got a lot of information about both the Root Hub and the CD-Writer. I'm ninety-nine percent sure that I have all the modules ready to go. If I could just find out the device name. I think you are right about SD* but there is a neverending list. Do you know how to, or where to get a printout of the list lilo spits out as the kernel's loading?

Again, I appreciate all the help.
 
Old 04-18-2002, 08:47 AM   #4
Thymox
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I know it's only loosely related, but you could try some of the techniques used to connect USB digital cameras. What have you got to lose?
 
Old 04-18-2002, 11:57 AM   #5
handcock
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file system problem

ok, i checked out www.linux-usb.org. It had alot of good advice about usb storage and found an entry to append to fstab. I tried it out and get this message:

mount: wrong fs type, bad option, bad superblock on scd0,
or too many mounted file systems
I have the filetype as iso9660. I also noticed that during the boot process and fstab was updated, there was a new device added, cdrom1 which points to my cd-rw device( scd0) i get the same message when i try to mount cdrom1. with this said, 2 questions:

1) does anyone know what filesystem it wants?
2) is this message because i created the cd under WIN2000?


thanks,
 
Old 04-19-2002, 10:07 AM   #6
Thymox
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It might be, but it shouldn't.

If the disc itself is a CD-R, then make sure that you've got everything you need, like the Joilet stuff. If it's a CD-RW disc, then you'll need to check out the [u]UDF[/i] things. The way that CDRWs are written, to some extent, depends on the software used. If you used a proper package, like Nero or Easy CD, then you should be OK. If you used that thing where you can drag 'n' drop files onto the CD, then you may run into problems.
 
Old 04-19-2002, 12:14 PM   #7
handcock
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Smile HAHA

That's funny, I used the drag and drop method to steer clear of problems that might come up. Ironic. I'll try out NERO. Thanks.
 
Old 04-19-2002, 12:26 PM   #8
Thymox
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Yeah, I'm not sure about the specifics of the 'drag n drop' system that Windows uses, but I think:

It creates a filesystem table at the beginning of each CD, allocating certain numbers of 'blocks' of the CD (hence drag and drop cds invariably have less space on them than fully blank cds).

It seems like a very nice method of making a cdrw truely rw, but it does come at a price. If you're happy with using Nero/Easy, then may I suggest you do it that way - never had a problem yet.

Oh, yeah. With regards to which /dev/sd? device it would be. Unless you already have lots of SCSI devices attached to your computer, it's likely to be /dev/sda.
 
Old 04-19-2002, 05:11 PM   #9
handcock
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actually, my pc set it up as scd0 which, i'm guessing is the default for scsi cd. the usb site also had the device as scd0.
actually, it turns out that i can't read the same cd on the win2000 pc that i made it on. it appears that i have problem besides the device. I'll keep reading through my books. Thanks for all the help Thymox.
-Jeremy
 
Old 04-20-2002, 03:38 PM   #10
zmedico
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"drag and drop" UDF cd's created with DirectCD on windows are often readable under Linux. You just have to specify types "udf" instead of "iso9660" when using the mount command.

If you are trying to get your drive to work for the first time, its probably wise to stick with "iso9660" filesystems.
 
  


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