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On Fri, May 13, 2011 at 18:35, Mick <michaelkintzios@×××××.com> wrote: |
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> On Friday 13 May 2011 20:11:01 James Wall wrote: |
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>> |
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>> Another tool which will work well is dd. |
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>> as an example to back up my laptop before experimenting with new |
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>> distros, I do dd if=/dev/sda of=/mnt/backup/jalopy.img bs=2M to back |
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>> up the drive for a bare metal restore of the 40 GB hard drive. |
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>> |
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> |
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> Is the bs=2M important? Should one use the block size of the drive? |
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Speed improvement. |
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If you're doing a backup of a rather large disk, I duggest piping to |
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bzip2 or gzip. Unless the free space is random padding, even the |
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slightest |
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compression will be more efficient, space-wise, than the raw file. The |
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big problem is bzip2 -9, because you only get ~2.5 MB/s compression |
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speed. |
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