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Installing Gentoo on IA64 on an external hard drive
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bluedot951
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PostPosted: Tue Oct 23, 2012 9:34 pm    Post subject: Installing Gentoo on IA64 on an external hard drive Reply with quote

Hey everyone,

I'm not new to Gentoo, but am new to these forums, so apologies in advance if I posted this in the wrong section :).

Anyway, I am attempting to install Gentoo on an Itanium 2. Furthermore, I unfortunately don't have a SCSI hard drive on hand, which the Itanium supports, so I have hooked up a PATA (IDE) drive via a IDE to USB enclosure. I was successful in installing Gentoo to the drive, but I am unable to boot into my installation. While booting, I receive a kernel panic, and get the message:

VFS: Cannot open root device "sda3" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Here is a link with a picture of the monitor:
http://imgur.com/EPmnC

Please let me know if I can provide any more information to help you.

I am eager to resolve this problem, and I would like to thank all of you in advance for your assistance.

Thanks,
Shantanu G
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BillWho
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PostPosted: Tue Oct 23, 2012 11:53 pm    Post subject: Reply with quote

bluedot951,

Could you paste back your grub config file and ls -l /boot for starters :?:
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Since installing gentoo, my life has become one long emerge :)
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bluedot951
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PostPosted: Wed Oct 24, 2012 12:54 am    Post subject: Reply with quote

Hey Bill,

I am actually using elilo as this is an Itanium machine with EFI. Would you like me to post elilo.conf instead?

Thanks for your reply!

Shantanu G
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chithanh
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PostPosted: Wed Oct 24, 2012 1:19 am    Post subject: Reply with quote

Looks like your kernel does not have the correct driver for your enclosure. Or it could be that you have only the ohci driver enabled when you need uhci (lspci -k will tell). Possibly scsi disk support is missing. If enabling that doesn't help, post your kernel .config (or use an initramfs).
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BillWho
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PostPosted: Wed Oct 24, 2012 1:30 am    Post subject: Reply with quote

bluedot951,

I don't think you can boot to other than a partition on /dev/sda without an initfamfs.. I might be wrong, but I had to use an initramfs to boot from sdb1. I have two gentoo installations on sda that boot directly from the kernel, but it just wouldn't boot from sdb.

If you have an initramfs it might be a setting in your .config.

Posting your elilo.conf might help for others browsing this thread :wink:
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Since installing gentoo, my life has become one long emerge :)
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BillWho
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PostPosted: Wed Oct 24, 2012 1:31 am    Post subject: Reply with quote

bluedot951,

I don't think you can boot to other than a partition on /dev/sda without an initfamfs.. I might be wrong, but I had to use an initramfs to boot from sdb1. I have two gentoo installations on sda that boot directly from the kernel, but it just wouldn't boot from sdb.

If you have an initramfs it might be a setting in your .config.

Posting your elilo.conf might help for others browsing this thread :wink:
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Since installing gentoo, my life has become one long emerge :)
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bluedot951
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PostPosted: Wed Oct 24, 2012 12:21 pm    Post subject: Reply with quote

Hey Guys,

I'd like to thank all of you for all your help! However, I managed to get it working by just using genkernel. I have read some articles saying that genkernel makes the boot slower, and others saying it also makes the machine slower in general. As this is a server, I am planning to run it 24/7, so the boot doesn't bother me. However, I was wondering if it was true that genkernel makes the general running of the machine (significantly) slower, because in this case I'll probably have to consider messing with the kernel again.

Unfortunately, I am at school right now, and I cannot get to my elilo.conf file or my kernel (my school blocks outgoing ssh).

I am pretty sure that /dev/sda3 is correct, as the machine has no internal hard drive, and the external IDE (USB via enclosure) drive is the only HDD connected to the machine.

Thanks,
Bluedot
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