13.04 raring: grub2 iso & sata loopback failed, 32 and 64 bit

[grantbow]

I've looked but haven't found anything in the forums or on launchpad.net yet. All previous Ubuntu versions work fine using grub2 to loopback mount the .iso image to try out the newer versions without requiring either a USB stick image or burning a dvd/cd.

When I boot the iso images using grub2 on a usb stick they work ok.

When I try to boot the iso images using grub2 on a sata disk I get the following errors and then it drops to busybox:

ata1.00: qc timeout (cmd 0xec)
ata1.00: failed to identify (I/O error err_mask=0x4)

There may be some kernel parameters I can pass but I'm not sure what to try. Any ideas?

Grant
http://ubuntu-california.org

[oldfred]

All my drives are SATA, and the drives are from 2006. I do have AHCI on in BIOS.

I installed 13.04, by booting grub on sdd an SSD, to loopmount an ISO on sdb to install on sdc without any issue.

I have nVidia so I have built into all my loopmount linux lines the nomodeset. Not sure what other parameters you may need. Did other versions work?

[grantbow]

So just to clarify, I'm just trying to boot an iso from a file on my sata disk and the kernel is panicing during boot. It works fine on USB but fails when the iso file is on a sata drive. All the other parameters are the same. All previous versions of ubuntu kernels have not paniced like this and they boot OK with sata just the same when booting OK with usb. Booting from an .iso file on the sata disk helps a lot to be able to test out .iso images quickly.

[oldfred]

Whenever I had issues like that it was usually some command on set root, or boot parameters in linux line.

This was what I used, but I had to add a gpt module as sdb is gpt partitioned.


menuentry "Ubuntu 13.04 Raring ISO 64bit" {
set isofile="/iso/raring-desktop-amd64.iso"
insmod part_gpt
loopback loop (hd2,4)$isofile
linux (loop)/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=$isofile nomodeset
initrd (loop)/casper/initrd.lz
}


This will boot an ISO from a hard drive.
ISO Booting with Grub 2 from Hard drive - drs305
https://help.ubuntu.com/community/Grub2/ISOBoot
Examples - you may copy & edit for your path & ISO version
https://help.ubuntu.com/community/Grub2/ISOBoot/Examples
http://ubuntuforums.org/showthread.php?t=1549847