I need to access a Seagate ATAPI tape drive through Redhat Enterprise
Linux.  I see the tape drive recognized in the dmesg message (relevant
parts included below), however no /dev/st0 device exists and I can't
find a way to use dump or restore with the drive.  The answer I want
is instructions to allow me to use dump/restore with this tape device.

I'm not sure exactly what information will be useful, so if you need
me to run further commands let me know.

Linux version 2.6.9-5.EL (bhcompile@decompose.build.redhat.com) (gcc
version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)) #1 Wed Jan 5 19:22:18
EST 2005

PIIX4: IDE controller at PCI slot 0000:00:07.1
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0x1420-0x1427, BIOS settings: hda:pio, hdb:DMA
    ide1: BM-DMA at 0x1428-0x142f, BIOS settings: hdc:DMA, hdd:pio

Probing IDE interface ide1...
hdc: 56X CD-ROM, ATAPI CD/DVD-ROM drive
hdd: Seagate STT20000A, ATAPI TAPE drive

[root@vortex dev]# ls -al st*
lrwxrwxrwx  1 root root 15 Jul 12 03:09 stderr -> /proc/self/fd/2
lrwxrwxrwx  1 root root 15 Jul 12 03:09 stdin -> /proc/self/fd/0
lrwxrwxrwx  1 root root 15 Jul 12 03:09 stdout -> /proc/self/fd/1

You will need to compile device support into your kernel (or compile a
tape drive kernel module, if such a beast exists, and modprobe it). 
Good luck!

Thanks!  I will look into this.