Installing Gentoo on Generation 2 Hyper-V VM

[Leonastas]

I'm trying to setup Gentoo on a Hyper-V VM and have tried to use both the LiveDVD and the RescueCD and both fail to find the media during the startup process. I think it is likely due to the SCSI adapter the VM uses for the DVD drive, but there is no way to change that (and yes, I am intentionally and specifically wanting a Generation 2 VM). Is there some boot parameter or other feature I can use to get this going?
Here is a screengrab of the error:
http://i67.tinypic.com/2lv1nia.png

Thanks in advance for any advice.

[R0b0t1]

Hello,

For some reason Gentoo is failing to mount the squashfs and copy it to /newroot. I suspect this is because the CD is inaccessible. This is most often the case when populating udev is slow - if there is another cause, I am not aware of it. An indirect solution is mounting the squashfs manually and proceeding with startup of the operating system. Unfortunately, I can't remember the steps to do this. It would be useful to mount the LiveCD and inspect the contents, specifically the startup scripts (which might be hard to do without a working Linux system...).

EDIT: See https://forums.gentoo.org/viewtopic-t-244837.html, "Creating the initrd image," step 6. I am not sure if this is exactly the same as what happens on the LiveCD but it is close. Unfortunately I can't reproduce your problem or I would get it working for you.

I invite you to search for some combination of "gentoo livecd mount squashfs" - not because I think one could obviously solve the problem by searching this, and that you should have done this, but because I can't find the precise answer I need to give you (what you will find is people wanting to create a GRUB entry that boots a Gentoo LiveCD) and this is the best I can do to acquaint you with the terminology of the problem.

Example: https://forums.gentoo.org/viewtopic-p-6527390.html

A direct solution might be had by modifying the parameters given to Hyper-V if there are any that change device availability on boot. You could also try VirtualBox, but I understand your preference for Hyper-V.

[Leonastas]

[R0b0t1]

Hi again,

I just happened to remember the direct solution. When booting the LiveCD, type "gentoo scandelay[=10]" or some higher number. The CD prints a boot message similar to "Hint: Use scandelay[=seconds] if populating devices is slow."

If you are able to diagnose which Hyper-V modules are missing, please mention them; I would expect the LiveCD to simply work. Enabling the scandelay may solve your issue. I only used Hyper-V sparingly last I was able as other things came up, but I remember booting a LiveCD properly.

Reference: https://wiki.gentoo.org/wiki/Handbook:AMD64/Full/Installation#Booting_the_installation_media

It must have been the case I got caught up in the details of how the boot process is implemented, probably having to do with the last time I had to go digging through all of this stuff.

[Leonastas]

[WHAINTE]

Hello, Im running into the same problem.
do i have to follow every part with another livecd or i can just Format the disks and start with the gentoo livecd?

[bbgermany]

[WHAINTE]