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在 2008-05-07三的 19:49 -0700，Mark Knecht写道： |
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> Hi, |
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> I'd just like to confirm this before I make a mistake and hurt my system. |
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> |
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> The existing system drive is /dev/sda: |
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> |
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> /dev/sda3 is root |
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> /dev/sda1 is boot |
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> |
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> That's all there is. |
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> |
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> Using the stage4 tar I idea I added a drive which is /dev/sdb and |
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> has these partitions of interest |
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> |
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> /dev/sdb3 will be new root |
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> /dev/sdb1 will be new boot |
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> /dev/sdb5 will be new var |
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> /dev/sdb6 will be new video |
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> |
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> I've mounted the new drive under /mnt like this: |
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> |
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> /dev/sdb3 /mnt/backups [[[This will be the new / ]]] |
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> /dev/sdb1 /mnt/backups/boot |
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> /dev/sdb5 /mnt/backups/var |
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> /dev/sdb6 /mnt/backups/video |
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> |
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> So this essentially creates a new file system that will eventually |
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> take over when I boot from this drive tomorrow. (Hopefully) |
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> |
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> Now, in the video directory I have my stage4 tar file which I want to |
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> untar into this new drive and not, hopfully, over my old drive. Will |
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> the following work? |
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> |
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> cd /mnt/backups |
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> tar xjpf video/Sector9-stage4-2008.05.07-custom.tar.bz2 |
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> |
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> I'm just trying to be really careful here. I think this is all an |
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> extension of how we build a Gentoo machine by untaring a stage3 file |
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> but I'm doing it on a system that's live and I don't want to mess up |
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> the exiting drive. |
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I think you don't have to tar/untar, using rsync is more straight forward. |
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|
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just like: |
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|
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mount /dev/sdb3 /install |
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cd /install |
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rsync -av /* . --exclude=/dev --exclude=/proc --exclude=/sys |
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--exclude=/tmp --exclude=/var/tmp --exclude=/selinux --exclude=... |
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make sure /sys, /proc are not included (probably also /tmp, /var/tmp) |
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|
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then: |
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|
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mkdir -p tmp var/tmp |
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chmod 1777 tmp var/tmp |
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|
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mount /dev/sda3 /mnt/temp # orignal / directory |
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cp -av /mnt/temp/dev . # rsync /dev, not directly because /dev is |
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dynamically mounted by udev. |
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mkdir -p sys proc selinux ... |
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|
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please also don't forget mount /boot before rsync (or tar/untar). |
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|
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> If this is correct then I'll chroot into the new environment for |
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> testing, adding grub, etc., and then do a BIOS change to boot off of |
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> the second drive and hopefully be live. |
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I think it will be easier to use LVM then you don't have to manage raw harddisk names like hdaX or hdbX, also it's more flexible and easier to management |
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|
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for your instance, please also don't forget modify /etc/fstab (if |
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neccessary), but you could also use disklabel/uuid instead of raw |
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harddisk names), ie: |
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|
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LABEL=/gentoo / ext3 noatime 0 0 |
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UUID=whatever /var reiserfs noatime,notail,nosuid 0 0 |
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... |
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|
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> Thanks, |
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> Mark |
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-- |
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Wang, Baojun Lanzhou University |
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Distributed & Embedded System Lab http://dslab.lzu.edu.cn |
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School of Information Science and Engeneering wangbj@×××××××××××××.cn |
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Tianshui South Road 222. Lanzhou 730000 .P.R.China |
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Tel: +86-931-8912025 Fax: +86-931-8912022 |
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