install from hard disk and /dev/root does not exist message

[Gianluca Cecchi]

On Wed, May 30, 2012 at 12:45 AM, Gianluca Cecchi  wrote:
> Hello,
> Having a laptop without cd and not connected to the internet I'm
> testing replacing an existing f16 (no backup needed)
>
> First attempt:
> - put vmlinuz and initrd.img from dvd iso into the /boot directory of
> f16 installation
> - put dvd iso under an usb external disk (/f17 dir in its first
> partition, formatted as ext4)
> - add section to grub2.cfg with only
>
> insmod ext2
> linux /boot/vmlinuz.f17
> initrd /boot/initrd.f17
>
> (don't know if I have to put "set root" to anything...)
>
> - reboot and select new entry.

It seems it was an usb3 problem.
In fact my external usb disk is usb3 and I was able to use it
connected to the usb3 port of my laptop without any problem in F16.
As I saw some usb reset messages during boot I also tried to put the
usb3 disk into an usb2 port and the installation worked like a charm
(just writing from f17 reinstalled system)
btw: the working line put in grub was
linux /boot/vmlinuz.f17 repo=hd:sdb1:/f17

Strange enough, the installed system is able to use the usb3 disk
connected to the usb3 port without any problem, but probably the
anaconda kernel is different in options supported in respect with the
installed one?

It would be worth a note, if this is a case in general for usb3
support during install
I came to this test day link below, but not had the time to see all
the notes/bz in reference section...
http://fedoraproject.org/wiki/Test_Day:2012-03-13_USB_3.0

My laptop is an Asus U36SD

Gianluca