I can't get slackware to install to a virtualbox vm
 

I've installed 2 times, and the virtual media manager acknowledges that occupied disk space is 6gb of 8gb. however, when I try to boot the vm, it says FATAL No bootable medium found, system halted. I'm installing slack 12.2 from the dvd iso. used cfdisk for the partitioning.

Did you install LILO to the MBR? That's what I've done to get Slackware to boot from the hard drive using VirtualBox.

Slackware Setup select LILO destination
http://www.basicconfig.com/slackware...lo_destination

Did you cfdisk it, mkfs.ext3 it and then poweroff, boot back up
and then install?
Or did it all at once?
I don't know much 'bout Vbox, though I do use it.
You can practice with some portables though...

You could try Portable-Slackware
just stay away from KDE....it'll run pretty slow with KDE
just make a 8GB or whatever qemu-img with portable-qemu and use the scripts, alreadyset
for slack to install and run.
I am speaking of Portable-Qemu.tar.gz
I also have a pre-made XFCE4 portable-slack there too; but it
will de-compress to 3 or 4GB after untaring so be on notice:)
If you just use portable-qemu it's already setup for slackware
with scripts for windows and linux , a vhd maker a how-to and
all you gotta add is slackDVD

Are all the files on the VM and have you ran lilo to install itself on the VM disk ? You could try booting with the VM ISO and at the lilo prompt - if Slackware is installed to say /dev/sda2 - enter This will boot to the installed Slackware from which you can rerun lilo. The other option is to boot to the ISO, mount the Slackware VM disk and run lilo from there.

To be honest it just sounds like lilo is missing from the MBR as already said. You just need to fix this.

I'm using virtualbox with Slackware my self. I think the error is your boot sequence. Go into settings of your slackware installation and change the boot sequence to start with the harddisk you installed slackware to. I had the same error when I installed slackware and that was my solution :)

Also, make sure the optical drive settings don't reflect the drive being mounted without the disc physically there when you reboot. The boot sequence by default has the CD/DVD drive before the hard disk as Dinithion mentioned.

Got it
 

turns out that it was the fact that I didn't install lilo. Thanks for all the help.