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Am 17.11.2010 22:59, schrieb James: |
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> Hello, |
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> |
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> I have a ~250 gig sata disk I want to migrate to a 2T |
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> Sata disk. This is simple, but, I have a few caveats. |
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> |
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[...] |
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> |
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> Device Boot Start End Blocks Id System |
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> /dev/sda1 * 1 6405 51448131 7 HPFS/NTFS |
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> /dev/sda2 6406 6431 208845 83 Linux |
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> /dev/sda3 6432 14080 61440592+ 83 Linux |
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> /dev/sda4 14081 38913 199471072+ 5 Extended |
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> /dev/sda5 14081 14861 6273351 82 Linux swap / Solaris |
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> /dev/sda6 14862 26335 92164873+ 83 Linux |
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> /dev/sda7 26336 38913 101032753+ 83 Linux |
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|
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[...] |
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|
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> <needs formatting and file systems installed> |
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> |
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> OK, so I format using fdisk <no big deal> |
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> <new disk will just have /(200G), swap, boot(250M) and one |
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> bit fat /usr/local (1.8T) |
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> |
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|
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My advice: dd if=/dev/sda of=/dev/sdb bs=65535 |
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|
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You end up with a lot of empty space on the end your disk but it is easy |
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to extend your extended partition with GParted (or whatever) and then |
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add new logical partitions. |
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|
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Alternative: Migrate to LVM for everything not needed for booting. |
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|
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> |
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> Ok now I was going to use same reiserfs < no big deal> |
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> unless I can use reiser4? good idea? <discuss-caveats> |
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> |
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|
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I guess you are a die-hard reiserfs user? You should really try ext4. |
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The perceived performance is much better than with ext3. Additional |
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advantages: Its development continues. With the next big patch, it will |
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scale well on multiple CPU cores.[1] |
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|
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|
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> OK now I want the new fstab to use disklabels |
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> <old dog learning new trick here> |
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> |
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> like this simple (few) partition scheme: |
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> /dev/sdb3 200G 52G 42G 55% / |
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> udev 10M 224K 9.8M 3% /dev |
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> /dev/sdb1 250M 47M 189M 20% /boot |
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> /dev/sdb4 1800G 125G 12G 92% /usr/local |
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> |
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> Current <non disklabel fstab> |
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> |
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> /dev/sda1 /boot reiserfs defaults 1 2 |
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> /dev/sda2 none swap sw 0 0 |
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> /dev/sda3 / reiserfs defaults 0 1 |
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> /dev/sda4 /usr/local reiserfs defaults 0 1 |
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> /dev/cdrom /mnt/cdrom auto noauto,ro,user 0 0 |
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> /dev/fd0 /mnt/floppy vfat noauto,user,umask=000 0 0 |
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> shm /dev/shm tmpfs nodev,nosuid,noexec 0 0 |
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> none /proc proc defaults 0 0 |
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> |
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> so what does new fstab using disk labels look like? |
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> |
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Just replace "/dev/sdb1" with "LABEL=boot", for example. Of course, your |
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file system needs to have that label. For Ext* you set it with `tune2fs |
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-L $label`, `e2label $label` or `mke2fs -L $label`. For reiserfs, it |
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should be similar. |
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|
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Another approach (less readable but arguably less easy to break) is |
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using "UUID=...". You can find these out with dumpe2fs. I guess |
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something similar exists for reiserfs, as well. |
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|
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> Last, just dd it over like this? |
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> dd if=/dev/sda of=/dev/sdb bs=32768 |
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> |
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|
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see above. |
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Hope this helps, |
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Florian Philipp |
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|
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[1] |
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http://thunk.org/tytso/blog/2010/11/01/i-have-the-money-shot-for-my-lca-presentation/ |
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