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How to Install Gentoo on Mobile Disk
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friddle
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Joined: 14 May 2013
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PostPosted: Tue May 14, 2013 2:29 am    Post subject: How to Install Gentoo on Mobile Disk Reply with quote

First of all.I am a Chinese student.please forgive my poor english.I do my best to express the Question Clearly

I have some error information with this probliem vfs cannot open root device gentoo
https://forums.gentoo.org/viewtopic-t-465985-highlight-unknownblock+0+0.html

But i am not use the sata raid.i just want to install gentoo on my mobile disk.
i use the genkernel to compile the kernel.
i do not install the grub.because i already install the Ubuntu.i type update-grub on my ubuntu system.it work.it can find the gentoo Linux
but when i reboot it.but failed.
The Error Message:
VFS: cannot open root device "/dev/sdb6" ..and tell me to reset the root.
So I change the Grub.cfg on My Ubuntu boot option
i change this line:
before: linux /boot/kernel-genkernel-x86-3.9.2-gentoo root=/dev/sdb7
after: linux /boot/kernel-genkernel-x86-3.9.2-gentoo root=UUID=0c38c109-4371-4dc6-842c-f7b685c6cffe (ps:i am pretty sure the UUID is right,i do it )
but when i reboot .i meet the other Error Message:
can't find this UUID Disk

but it provide shell.
when i type "ls /dev" i fount the folder /dev only contain sda[1-10],miss the Mobile disk devices sdb.


I want to figure out what mistake i made.Is i miss something when I Compile kernel or I have to made some Config change
Is anyone install Gentoo on Mobile Disk!please help me.


sincerely friddle


Last edited by friddle on Tue May 14, 2013 2:37 am; edited 1 time in total
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hielvc
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PostPosted: Tue May 14, 2013 2:32 am    Post subject: Reply with quote

Post your fstab .
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friddle
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PostPosted: Tue May 14, 2013 2:34 am    Post subject: Reply with quote

hielvc wrote:
Post your fstab .


my gentoo fstab:
/dev/BOOT /boot ext2 defaults,noatime 1 2
/dev/ROOT / ext3 noatime 0 1
/dev/SWAP none swap sw 0 0
/dev/cdrom /mnt/cdrom auto noauto,ro 0 0
/dev/fd0 /mnt/floppy auto noauto 0 0

thanks
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hielvc
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PostPosted: Tue May 14, 2013 3:05 am    Post subject: Reply with quote

you need to edit it. See the install guides. The quick guide is shorter use it.
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Ant P.
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PostPosted: Tue May 14, 2013 4:38 am    Post subject: Reply with quote

For reference, the "quick guide" mentioned above is this page (zh-cn language version here)
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friddle
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PostPosted: Tue May 14, 2013 1:51 pm    Post subject: Reply with quote

Ant P. wrote:
For reference, the "quick guide" mentioned above is this page (zh-cn language version here)


thanks .but i fix the problem.change my fstab configure.i meet the some problem.
when i move the Gentoo source to my local disk.the problem solved.
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NeddySeagoon
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PostPosted: Tue May 14, 2013 2:33 pm    Post subject: Reply with quote

friddle,

Is your mobile disk connected by USB?

Normally, the USB system is not started until after root is mounted. Thats a problem if root is on USB.
Add rootdelay=7 to the kernel line in grub.cfg. This allows 7 seconds for USB to start before root is mounted.
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