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Date: Thu, 20 Nov 1997 10:10:11 -0500
From: Larry Lile <lile@stdio.com>
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Subject: Problems mounting a cd-rom drive on 2.2_RELENG
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I ran accros a very strange problem last night and I was 
wondering if someone could shed some light on this.

I had a drive bay smoke a power supply and had to move
the data from that drive to another, when I had the system
rebuilt I became unable to mount a cdrom.  When I try to
mount the cdrom this is what happens:

anarchy: # mount /cdrom
cd9660: /dev/cd0a: Invalid argument

here is the fstab entry:

anarchy: # grep cd9660 /etc/fstab
/dev/cd0a                       /cdrom          cd9660  ro,noauto 0 0

and the boot messages for the cdrom drive are

Nov 20 03:13:05 anarchy /kernel: (ncr0:6:0): "TOSHIBA CD-ROM XM-3601TA
0725" type 5 removable SCSI 2
Nov 20 03:13:05 anarchy /kernel: cd0(ncr0:6:0): CD-ROM 
Nov 20 03:13:05 anarchy /kernel: cd0(ncr0:6:0): asynchronous.
Nov 20 03:13:05 anarchy /kernel: can't get the size
        [ with FreeBSD 2.1.5 live filesystem cd in cd-drive
          yes, I opened it up and checked just to make sure
          i'm not losing my tiny little mind :)  ]

What is truly bizzare is that I do have a cd in the drive and if
I boot kernel.GENERIC it reports the correct size of the cd and
will allow me to mount the filesystems.

Nov 20 03:11:13 anarchy /kernel.GENERIC: (ncr0:6:0): "TOSHIBA CD-ROM
XM-3601TA 0725" type 5 removable SCSI 2
Nov 20 03:11:13 anarchy /kernel.GENERIC: cd0(ncr0:6:0): CD-ROM 
Nov 20 03:11:13 anarchy /kernel.GENERIC: cd0(ncr0:6:0): asynchronous.
Nov 20 03:11:14 anarchy /kernel.GENERIC: cd present [313642 x 2048 byte
records]
         [ Same 2.1.5 cd in the drive ]

        
I thought it might be bit-rot in the kernel so I rebuilt it from
scratch, no dice. Then I thought maybe it was SCSI_DELAY so I made it
15, just like GENERIC, still no luck.  I saw this problem on my other
system and posted a question but got no really good answer and still
cannot mount the cd on that system, it is 2.2.2 release.

I'm stumped :(  Currently I have cvsup'd the latest 2.2_RELENG
sources and am running a make world, then I will rebuild my 
kernel and hope for the best.  In the mean time, any ideas?
Any help would be greatly appreciated.

Larry Lile
lile@stdio.com