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changing system disk without reinstal? 6
- Thread starter piti
- Start date
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2
- #2
The best way is just to install your new disk, format and
partition it., and then mount it: mount /dev/hdd /mnt/new
Then say that you want to transfer the contents/structure of /var to the new disk..good choice if you have a busy
server class box with a single drive(bad idea).
cp -a /var/ /mnt/new
rm -rf /usr
ln -s /mnt/new /usr/
Then add your new mount scheme to /etc/fstab.
That is one way.
With the new journaling filesystems and lvm there are other options.
for reiserfs is a source and the
lvm howto is an excellent source for lvm and software raid.
Good Luck.
partition it., and then mount it: mount /dev/hdd /mnt/new
Then say that you want to transfer the contents/structure of /var to the new disk..good choice if you have a busy
server class box with a single drive(bad idea).
cp -a /var/ /mnt/new
rm -rf /usr
ln -s /mnt/new /usr/
Then add your new mount scheme to /etc/fstab.
That is one way.
With the new journaling filesystems and lvm there are other options.
for reiserfs is a source and the
lvm howto is an excellent source for lvm and software raid.
Good Luck.
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2
- #4
Hi,
Hmmmmm .... yes that particular typo would not have had quite the desired result !!
If you're adding hard drives you're obviously going to take the system down so, once you've copied files/directories onto a new physical partition you can just edit /etc/fstab to mount that partition at the normal mount-point. For example, if /var was previously within the '/' partition you can add a line like the following saying its now on another physical partition :
/dev/hdb1 /var ext2 defaults 1 2
(/dev/hdb1 is just an example)
This is a bit simpler than using links. Obvious candidates for their own partition are /var, /usr, /home . Please note, however, that you cannot put any of : /bin, /dev, /etc, /lib, or /sbin in separate partitions because they must all be in the filesystem at boot time.
Regards
Hmmmmm .... yes that particular typo would not have had quite the desired result !!
If you're adding hard drives you're obviously going to take the system down so, once you've copied files/directories onto a new physical partition you can just edit /etc/fstab to mount that partition at the normal mount-point. For example, if /var was previously within the '/' partition you can add a line like the following saying its now on another physical partition :
/dev/hdb1 /var ext2 defaults 1 2
(/dev/hdb1 is just an example)
This is a bit simpler than using links. Obvious candidates for their own partition are /var, /usr, /home . Please note, however, that you cannot put any of : /bin, /dev, /etc, /lib, or /sbin in separate partitions because they must all be in the filesystem at boot time.
Regards
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2
- #5
bluedevils
MIS
isn't there a better way using dd? dd would be the way to go if you want to transfer the whole disk image.
If you just want to add a disk then you can temporarily mount onto /mnt/temp, copy the old mount to the /mnt/temp. Once the copy is verified, you can edit /etc/fstab so that the new file system takes the place of the old mount. The old mount can now be used for something else.
This a better solution than linking the new mount to the old.
If you just want to add a disk then you can temporarily mount onto /mnt/temp, copy the old mount to the /mnt/temp. Once the copy is verified, you can edit /etc/fstab so that the new file system takes the place of the old mount. The old mount can now be used for something else.
This a better solution than linking the new mount to the old.
- Thread starter
- #6
thanx guys for your posts
your way is adding another disk to the system, am i right?
i was actually searching for a disk (partition) image transfer, with the possibility to transfer the original (small) partition to a bigger one on the new disk and then somehow changing config files that represent the disk status (i found only /etc/fstab with such info) to reflect the new situation
could it be done with the "dd" way as bluedevils posted?
your way is adding another disk to the system, am i right?
i was actually searching for a disk (partition) image transfer, with the possibility to transfer the original (small) partition to a bigger one on the new disk and then somehow changing config files that represent the disk status (i found only /etc/fstab with such info) to reflect the new situation
could it be done with the "dd" way as bluedevils posted?
bluedevils
MIS
I've never done a disk image copy, but the basic would be dd if=/dev/hdc of=/dev/hdd
Oooh another reminder if you don't use dd and you try the /mnt/temp thing, you might want to use tar instead of copy. It preserves ownership and permissions.
man pages are your friends.
Oooh another reminder if you don't use dd and you try the /mnt/temp thing, you might want to use tar instead of copy. It preserves ownership and permissions.
man pages are your friends.
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