Mounting an EXT2FS CD on FreeBSD-5.1

[Satish Vanimisetti]

I am trying to mount a CD burned with an EXT2 filesystem on
a PC installed with FreeBSD-5.1

  # mount -t ext2fs /dev/acd0 /cdrom
  ext2fs: /dev/acd0: No such file or directory

  # ls -l /dev/acd0
  crw-r--r--  1 root  operator  117,   0 Jul 31 02:06 /dev/acd0

I get an "incorrect superblock" error message when I try to
mount the CD as cd9660. I took that to mean that /dev/acd0
works since the superblock is being read.

  # mount /dev/acd0 /cdrom
  mount: /dev/acd0 on /cdrom: incorrect super block

The following is the relevant output from dmesg:
---
kernel: ata1-master: piomode=12 dmamode=34 udmamode=-1 dmaflag=1
kernel: ata1-master: success setting PIO4 on Intel ICH0 chip
kernel: acd0: <LG CD-RW CED-8042B/1.07> CD-RW drive at ata1 as master
kernel: acd0: read 4134KB/s (34515KB/s) write 689KB/s, 2048KB buffer, PIO4
kernel: acd0: Reads: CD-R, CD-RW, CD-DA stream, packet
kernel: acd0: Writes: CD-R, CD-RW, test write
kernel: acd0: Audio: play, 255 volume levels
kernel: acd0: Mechanism: ejectable tray, unlocked
kernel: acd0: Medium: no/blank disc
---

I read another message on the list archives where someone was
trying to mount an ext2 filesystem off of a USB device. He had
something similar going on.

Is this a bug, or am I doing something wrong?

Thanks,
Satish Vanimisetti