Not a block device error for Sony 55e CD-ROM

Not a block device error for Sony 55e CD-ROM

Post by M.P. Kir » Fri, 20 Jan 1995 13:21:44



I'm trying to set up my system with linux and am having trouble getting
it to recognize my Sony 55e CD-ROM.  I'm kinda new to the PC scene,
but not the unix scene, so please bear with me.  My setup is as follows:

        486/66 dx2
        Adaptec 2940 SCSI2 drive
        500M Seagate (Linux disk)
        540M PCI IDE (DOS/Boot disk)
        Sony 55e PCI IDE CD-ROM drive

I've compiled the latest kernel from sunsite (1.1.81) along with the
adaptec 2940 support.  I've also followed the instructions in the
README.ide file and ran the MAKEDEV.ide script which creates the
hdc/d device files.

The problem is when I try to mount the cdrom with the /dev/hdc device,
it tells me that /dev/hdc is not a block device.  Doing a 'file /dev/hdc'
tells me that it is.  The mount command is:

        % mount -t iso9660 -o ro /dev/hdc /cdrom
and
        % mount -t iso9660 -o ro -o block=2048 /dev/hdc /cdrom

At boot time, nothing is mentioned about the hdc device but I get the
same error when it reads the fstab and tries to mount /cdrom.

Please let me know if more information is needed.  Any help would be
very much appreciated.  Thanks in advance!

Jeff

 
 
 

Not a block device error for Sony 55e CD-ROM

Post by SNY.. » Fri, 20 Jan 1995 21:05:38


   I'm trying to set up my system with linux and am having trouble getting
   it to recognize my Sony 55e CD-ROM.  I'm kinda new to the PC scene,

   The problem is when I try to mount the cdrom with the /dev/hdc device,
   it tells me that /dev/hdc is not a block device.  Doing a 'file /dev/hdc'

That means that the kernel doesn't think that that device exists.
Did you try using `hdc=cdrom' on the lilo command line?
Some people report that things work better if they first boot mess-dos
(loading the cdrom driver), then warm-boot to linux.

sss

 
 
 

1. New IDE-CD/extended IDE driver supports Sony 55E ATAPI CD-ROM!

I'm now successfully using my Sony CDU-55E CDROM drive (an ATAPI drive)
from Linux.  I'm using 1.1.75 plus the ide/ide-cd patch by Mike Lord and
Scott Snyder.  I understand that this code is now part of 1.1.76.  Cool!
This means that just about all my stuff is now supported by "standard Linux".

There are some rough edges.  As mentioned in the README.ide file in
/usr/src/linux/drivers/block, the mount command for the cdrom must be
just right; if a block size other than 2048 is used (or block size
isn't specified, weird errors result).  I initially thought this meant
it didn't quite work.  However, given the exact commands mentioned in
README.ide:

        ln -sf /dev/hdc /dev/cdrom
        mkdir /cd
        mount /dev/cdrom /cd -t iso9660 -o ro,block=2048

I am now successfully reading CDROMs.

Some folks mentioned that they got the older NEC-260 driver to work
provided they'd booted DOS first and used LOADLIN; I'm booting from
LILO and everything works fine.

Note that this drive isn't mentioned in the README.ide file.  Anyone
documenting this, please add the Sony 55E to the list of drives it
works with.

Thanks to all who sent me mail, and especially to Scott Snyder for writing
ide-cd.c !

--

Phone: +1 415 694 1729

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