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Icer
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 Posted: Thu Feb 11, 2010 6:00 pm Post subject: [SOLVED]upgrade system but keep harddisks possible? |
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Hello folks. I've been forced to upgrade my pc since the ye olde motherboard got busted. So I'm using this opportunity to buy a new processor, some memory and a motherboard. I need to keep the old hard disks for now. at least until I can get the data copied somewhere.
So previously I had a athlon xp processor and a integrated nvidia graphics card. I have several harddisks: one with ide interface and a couple other with sata interface plus a cd/rw disk drive. first few disks including boot and root partition are on lvm2 partitions.
the new processor is going to be phenom and the motherboard has a integrated ati graphics card.
so am I correct when I assume that I have to first boot from live cd? or can I still boot from the hard disks? will the old kernel be able to cope with the new hardware?
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Last edited by Icer on Fri Feb 19, 2010 6:41 pm; edited 1 time in total |
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Rexilion
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| Posted: Thu Feb 11, 2010 6:58 pm Post subject: Re: upgrade system but keep harddisks possible? |
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| Icer wrote: | Hello folks. I've been forced to upgrade my pc since the ye olde motherboard got busted. So I'm using this opportunity to buy a new processor, some memory and a motherboard. I need to keep the old hard disks for now. at least until I can get the data copied somewhere.
So previously I had a athlon xp processor and a integrated nvidia graphics card. I have several harddisks: one with ide interface and a couple other with sata interface plus a cd/rw disk drive. first few disks including boot and root partition are on lvm2 partitions.
the new processor is going to be phenom and the motherboard has a integrated ati graphics card.
so am I correct when I assume that I have to first boot from live cd? or can I still boot from the hard disks? will the old kernel be able to cope with the new hardware? |
It depends if the old linux will cope with your new hardware for several reasons:
- Will the drive order be the same? (will /dev/sda still be /dev/sda in the new machine?)
- Optimizations (did you optimize your software for a totally different processor? if yes, you *could* get in trouble)
- Kernel (do you have support for your new hardware compiled? if not, that *could* cause trouble)
Luckily, this is all easily fixed. They can all be corrected by booting a livecd and then chrooting inside the gentoo installation. There you can alter the kernel, edit fstab for the new drives and emerge -e world with new optimizations. |
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Mike Hunt
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| Posted: Thu Feb 11, 2010 10:59 pm Post subject: |
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| ... but, you can't chroot a 64 bit stage3 from a 32 bit system. If that is the case then you will need install from an installCD, minimal or otherwise of the correct bitness. |
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Icer
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| Posted: Fri Feb 12, 2010 5:52 am Post subject: Re: upgrade system but keep harddisks possible? |
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| Rexilion wrote: | | Icer wrote: | Hello folks. I've been forced to upgrade my pc since the ye olde motherboard got busted. So I'm using this opportunity to buy a new processor, some memory and a motherboard. I need to keep the old hard disks for now. at least until I can get the data copied somewhere.
So previously I had a athlon xp processor and a integrated nvidia graphics card. I have several harddisks: one with ide interface and a couple other with sata interface plus a cd/rw disk drive. first few disks including boot and root partition are on lvm2 partitions.
the new processor is going to be phenom and the motherboard has a integrated ati graphics card.
so am I correct when I assume that I have to first boot from live cd? or can I still boot from the hard disks? will the old kernel be able to cope with the new hardware? |
It depends if the old linux will cope with your new hardware for several reasons:
- Will the drive order be the same? (will /dev/sda still be /dev/sda in the new machine?)
- Optimizations (did you optimize your software for a totally different processor? if yes, you *could* get in trouble)
- Kernel (do you have support for your new hardware compiled? if not, that *could* cause trouble)
Luckily, this is all easily fixed. They can all be corrected by booting a livecd and then chrooting inside the gentoo installation. There you can alter the kernel, edit fstab for the new drives and emerge -e world with new optimizations. |
Ok. I'll need to take a look at the install docs again. Been a long time since. I'll keep the drive order the same. Why would it be different?
Hmm... I have a amd64 system with quite basic optimizations. O2 etc. Cannot remember them all. What comes into the old kernel, I don't think it has support for the new hardware.
| Mike Hunt wrote: | | ... but, you can't chroot a 64 bit stage3 from a 32 bit system. If that is the case then you will need install from an installCD, minimal or otherwise of the correct bitness. |
K. I thought so. So 64bit live CD it is then.
What I'm most worried is that can I get the lvm2 partitions to show up and be accessible when booting from the CD?
Anyway thanks for the advice. 
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Rexilion
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| Posted: Fri Feb 12, 2010 6:44 am Post subject: |
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You have a new motherboard with new controllers. That means you have to transfer the disks from the old motherboard to the new one, that *could* cause a change in which order the drives are detected.
Lvm2 is supported by the kernel, it should just work if the necessary user-space tools are available (which is I think) |
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Mike Hunt
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| Posted: Fri Feb 12, 2010 11:53 am Post subject: |
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... and you might need to create the device nodes first if they don't show up: | Code: | vgscan
vgscan --mknodes
lvs |
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Icer
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| Posted: Fri Feb 12, 2010 7:16 pm Post subject: |
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| Mike Hunt wrote: | | ... but, you can't chroot a 64 bit stage3 from a 32 bit system. If that is the case then you will need install from an installCD, minimal or otherwise of the correct bitness. |
I checked the processor. The old one is athlon 64. So the bitness should be correct.
| Rexilion wrote: | | You have a new motherboard with new controllers. That means you have to transfer the disks from the old motherboard to the new one, that *could* cause a change in which order the drives are detected. |
Now that I think about this disk ordering I think it could be a problem. The old motherboard had 2 IDE interfaces so I had the disk which has the /boot and root partitions on first IDE if and the CD/RW on the second IDE if. The new one has only one IDE if. So that means I have to put the hard disk as master and the CD/RW as slave on the same if. That of course depends on my assumption that the physical cable connection order has any effect on the order the disks are detected.
I had one IDE hdd (with root and boot partitions) and one sata hdd on the lvm2 system while one sata hdd was not within the lvm2 group.
| Rexilion wrote: | | Lvm2 is supported by the kernel, it should just work if the necessary user-space tools are available (which is I think) |
That is good to know. Thanks again.
Right now I'm waiting for the parts. Hopefully they arrive next week.
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Icer
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| Posted: Thu Feb 18, 2010 7:11 am Post subject: |
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I finally got the gear. As I suspected the old kernel does not work with the new hw. I booted up from livecd(using the kernel parameter dolvm) and I am able to find and mount the old disk partitions. The lvm partitions show up too.
Yesterday I tried to compile new kernel but I did not get the sata driver right. I tried to lsmod and lspci to see what drivers the livecd used. Anyway I had to go to sleep before I got it working. If anyone got good ideas how to find out the correct drivers please tell me. The motherboard I use is asus m4a785td-v evo. As usual the motherboard manual is not very useful in finding out what driver I should use with Linux. For the display driver I can emerge ati drivers but I'm not that far yet.
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keenblade
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Icer
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| Posted: Thu Feb 18, 2010 12:17 pm Post subject: |
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| keenblade wrote: | | Icer wrote: | | If anyone got good ideas how to find out the correct drivers please tell me. |
Paste the output of "lspci -n" into the http://kmuto.jp/debian/hcl/ . It will tell you the correct drivers. (thanks to pappy) |
That page looks very promising. They list my motherboard too. I'll check it out. Thanks!
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Icer
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| Posted: Thu Feb 18, 2010 4:59 pm Post subject: |
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Now I have booted with the new kernel. IIRC the missing thing was sata AHCI driver in the kernel. I'm recompiling the system because dbus and hal fail to start. they say: unknown user: "haldaemon" and unknown group: "plugdev" etc.
Let's see if that helps. Hopefully I can start using gnome soon.
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Rexilion
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| Posted: Thu Feb 18, 2010 6:32 pm Post subject: |
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| Hmm, that those groups are missing sounds pretty serious. How did you do that? :S . |
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Icer
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| Posted: Thu Feb 18, 2010 8:17 pm Post subject: |
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| Rexilion wrote: | | Hmm, that those groups are missing sounds pretty serious. How did you do that? :S . |
I don't know really. I'm re-emerging most packages now.
Hald and dbus did not start at first boot. re-emerging helped in that case. Also my normal user account was lost somehow but I was able to recreate it using the existing user-id. So the existing file ownership associations were not lost. The most important thing right now is that I managed to keep the existing files. 
I'm now trying to get X and gnome running. I emerged the ati-drivers and put VIDEO_CARDS="fglrx" in make.conf.
I noticed also a problem with the locales. In many packages complained about missing locales and defaulted to C locale. Just listing here things which I need to take a look at later...
It's actually quite fun to fix these things. I'm learning tons of new things again. It's like back in 2004-2005.
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Last edited by Icer on Thu Feb 18, 2010 8:20 pm; edited 1 time in total |
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Rexilion
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| Posted: Thu Feb 18, 2010 8:18 pm Post subject: |
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| DId your computer crash? It could be that some *very* important files are located inside the lost+found directory on the root of your partition.... |
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Icer
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| Posted: Thu Feb 18, 2010 8:49 pm Post subject: |
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| Rexilion wrote: | | DId your computer crash? It could be that some *very* important files are located inside the lost+found directory on the root of your partition.... |
Well I'm not 100% sure if I've had that kind of crash. Could be worth checking though.
But now it's time for me to call it a day. I got gnome and X working.
Still on todo: check audio, locales, keyboard, unicode, dual display settings, hardware monitor/sensors..
But I think this topic is finished/solved since I got the disks and lvm partitions up and running. Thank's to all who helped.
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Icer
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| Posted: Fri Feb 19, 2010 6:49 pm Post subject: |
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Recapping the steps here in case I need to do them again:
1. boot from livecd: (kernel)gentoo-nofb dolvm
2. vgscan
3. vgscan --mknodes
4. lvs
5. mount lvm and other partitions
6. chroot
7. make new kernel
8. reconstruct /etc/fstab
9. exit chroot
10. reboot
11. fix remaining problems
IIRC the steps were like that.
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Installing Gentoo
