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liveUSB (minimal CD) can't mount itself after boot kernel.
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pavelspb
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PostPosted: Mon Oct 15, 2012 8:53 am    Post subject: liveUSB (minimal CD) can't mount itself after boot kernel. Reply with quote

motherboard: ASUS P8z77-M Pro, CPU: Core i5 2500k.

1. Created liveUSB using handbook and minimal CD .iso (amd64 arch).
2. Boot from it - kernel starts, 4 tux appear, a bunch of modules loaded.
3. LiveUSB want to mount CD's root, so it is searching "where is the CD". It enumerates all storage devices in the system. It found /dev/sda1 - my SATA seagate barracuda 1TB and said that there is no more devices where it could try to find CD root, so it is stopped.

When i boot my laptop or another PC (another asus motherboard) from that liveUSB, the step (3) finds /dev/sda1, then /dev/sdb1 and successfully mounts that /dev/sdb1 as CD root and gentoo loads successfully.

What should i check in my BIOS setup? :) The same liveUSB but for 32-bit arch (x86) works well on the mentioned PC. The problem only for that amd64 (but x86 works well only using some specific USB port, not for any).

Any suggestions?
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likewhoa
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PostPosted: Mon Oct 15, 2012 1:00 pm    Post subject: Reply with quote

include "slowusb scandelay=5" in the kernel boot line and if that doesn't work, try raising the scandelay a bit more.
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pavelspb
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PostPosted: Mon Oct 15, 2012 6:23 pm    Post subject: Reply with quote

likewhoa wrote:
include "slowusb scandelay=5" in the kernel boot line and if that doesn't work, try raising the scandelay a bit more.

Thank you! But it had no effect (-; I tried scandelay=60 and it is still nothing. It gives a shell, so i type "dmesg | grep sd" there and i see only my /dev/sda1 (1TB sata HDD). It cannot see any other drive like my flash one. I have an external USB DVD-ROM, but i don't see any reason to try it with burned CD... I would like to get USB worked (-;

I use 4GB Transcend (fat-16) and 8 GB Kingston (fat-32).


Last edited by pavelspb on Mon Oct 15, 2012 8:08 pm; edited 1 time in total
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DONAHUE
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PostPosted: Mon Oct 15, 2012 7:19 pm    Post subject: Reply with quote

try http://www.sysresccd.org/Sysresccd-manual-en_How_to_install_SystemRescueCd_on_an_USB-stick minimal cd has a history.
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pavelspb
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PostPosted: Mon Oct 15, 2012 8:01 pm    Post subject: Reply with quote

DONAHUE wrote:
try http://www.sysresccd.org/Sysresccd-manual-en_How_to_install_SystemRescueCd_on_an_USB-stick minimal cd has a history.

1) "history"? Do you mean "problems? I found some trouble descriptions here: https://forums.gentoo.org/viewtopic-t-938278.html
2) Now i downloading gentoo "livedvd-x86-amd64-32ul-2012.1" - can i dd it to USB stick and boot? Will it help?
3) It is worth to find some older minimal amd64 CD without that bug?

Didn't heard about that RescueCD... Is that some king of wrapper that can boot gentoo? Or it should be considered as another "distro" that has all needed tools to manage partitions and so on?
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DONAHUE
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PostPosted: Mon Oct 15, 2012 8:20 pm    Post subject: Reply with quote

the live dvd may work for you, it was intended as a demo not as an installer
the sysresccd has a much better chance
any linux livecd/dvd/installed system that supports chroot and is of the desired bitness can be used to install gentoo since nothing from the cd becomes part of the install
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pavelspb
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PostPosted: Mon Oct 15, 2012 8:37 pm    Post subject: Reply with quote

DONAHUE wrote:
the live dvd may work for you, it was intended as a demo not as an installer
the sysresccd has a much better chance
any linux livecd/dvd/installed system that supports chroot and is of the desired bitness can be used to install gentoo since nothing from the cd becomes part of the install

As i understand (according to http://www.gentoo.org/doc/en/gentoo-x86-quickinstall.xml ), after boot i should download and deploy stage3 + portage snapshot on my HDD, and then chroot there - and then i HAVE ability to use emerge and all gentoo advantages? So it doesn't matter what kind of bootable CD i used before that chroot moment, right? But i need gcc also to compile the kernel. Does stage3 have it?

update
SystemRescueCD works great! It is gentoo-based in addition (-;
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