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mroconnor
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Joined: 24 Feb 2006
Posts: 402
Location: USA
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 Posted: Thu Jan 29, 2009 4:34 am Post subject: Re-partitioning Help |
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I need to merge two partitions into one. What concerns me most is making sure I archive the partitions correctly and extract them back correctly.
I will be merging /var and /usr/portage into one larger ext4 /var partition. I want to tar up /var using lzma compression but I am not sure how to do best to capture permissions/attributes and the restore them with all the correct ownership/permissions/attributes.
Once I get the backup/restore procedure correct, I can handle the rest - I think. 
Thanks in advance for any help. |
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fangorn
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Joined: 31 Jul 2004
Posts: 1886
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| Posted: Thu Jan 29, 2009 7:31 am Post subject: |
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| Code: |
mkdir /mnt/backup
mount -o bind /var /mnt/backup
cd /mnt/backup
tar cvjpf <filename>.tar.bz2 *
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This writes all contents of the partition to a bzip2 compressed tar archive.
to untar use
| Code: | | tar xvjpf <filename>.tar.bz2 |
The interesting part is the p option, which does the preserving.
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mroconnor
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Joined: 24 Feb 2006
Posts: 402
Location: USA
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| Posted: Thu Jan 29, 2009 2:32 pm Post subject: |
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Thanks @fangorn!
Just curious, why bind /var to the backup dir instead of just tarring /var itself? |
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fangorn
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Joined: 31 Jul 2004
Posts: 1886
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| Posted: Thu Jan 29, 2009 3:28 pm Post subject: |
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Just a bad habbit of mine 
That way you could be sure some runtime generated parts are not backed up. For instance when backing up / you would not get the contents of /dev /sys /proc (and any mounted filesystem by the way)
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mroconnor
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Posts: 402
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| Posted: Thu Jan 29, 2009 3:58 pm Post subject: |
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| I actually I like it, thanks again for the help. |
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