hi ,

well i'm using this setup as described in this previous thread
http://www.linuxquestions.org/questi...-stack-893333/

however this time i'm booting it in a real machine from a usb pen.

what happens is that the kernel can't identify the ext3 partition on the usb drive , in fact it says something like this...

now the good news is that it found all the partitions on my local HDD and i can also see from the boot gibberish above that , that the usb pen has been identified as a mass storage device...etc

the bad news is that , the usb drive is NOT listed among the valid partitions that i'm supposed to append to the root boot flag.

btw i've used the default configuration that comes with the kernel.

so what to do ?

cheers

What distribution are you using?

The easiest way to solve this problem is probably going to be to create an initrd with a root delay and usb support.

well there is no distribution !
this just grub + kernel + some basic libs from glibc ...

anyways , you mentioned usb support well to my knowledge that is already compiled into the kernel as i said the boot messages indicate that the usb pen is being identified as a mass storage device , nonetheless the usb partition can't be detected by the kernel...

cheers

Try adding rootdelay=25 to your kernel line in grub.

1 members found this post helpful.

alright that works !

so now the usb drive is identified as sdc and the partition as sdc1.

btw is there any way i could force the kernel to wait until all devices have initialed instead of just randomly waiting for 25 secs?
i've also noticed that when running this experiments in bochs i get a message saying "waiting 25 secs before mounting root"
while if boot for real i don't see this message at all it just waits.

i wonder why that is so...hmm

another question , how is the root delay measured ? from the moment of boot?

cheers

I think it starts not at the moment of boot, but at the moment that the root filesystem would be mounted if there were no root delay.

okay , is there anyway to force the kernel to wait until all devices haven been initialized before attempting to mount root without having to specify a fixed duration ?

btw i think rootdelay count from boot time because the amount of delay is much shorter than actual 25 seconds ....besides the timestamp that shows up on the right side of every boot message indicates 25 when the kernel proceeds after the delay .. but i could be wrong..