Copy boot partition to smaller partition
I've found several threads about copying the boot partition to a larger partition but not for copying to a smaller partition. Ignoring the why of the question, could anyone point me to how? Following the guide to "dd" thread only left me with a partition with a corrupted superblock and no real way to fix it. This is what I tried:
Code:
dd if=/dev/hda1 of=/dev/hdb1 bs=4096 conv=noerror |
Just use "cp -a ..." - IMHO "dd" is not a good way to copy partitions. You've discovered one of the reasons.
You will need to re-install the boot-loader and update fstab (if you mount /boot). |
"Just use "cp -a ..." - IMHO "dd" is not a good way to copy partitions. You've discovered one of the reasons."
I'm giving this a try as I type this as "cp -a / /mnt". However, since /mnt falls under "/", I expect it will fail. So, I'll probably need to do this from a liveCD, right? The disk already has an MBR, I think, from my previous disastrous exploits. :) Will I need to do anything special to make it bootable, or are you saying that I just need to install grub? I'm kinda lost on that point. |
Mission accomplished! Thanks for the help!
Added: I did have a couple of problems, and maybe someone's search will lead them to this thread. Boot message "waiting on root filesystem" - was caused by forgetting to rejumper the drive to master after the copy. The new motherboard has 2 ethernet ports vs one on the old one. Udev assigned both to eth0. For some reason, udev reassigned my wireless card to ath1. Both udev problems were fixed by editing: /etc/udev/rules.d/z25_persistent-net.rules Forgot to add "sata_nv" to my kernel before doing the copy, so I had no "/data" drive and thus no kernel source (I keep it on /data). Fortunately, it was easy enough to do an nfs copy of the source from one machine to the other and recompile with SATA turned on. |
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