Re: Questions about the dd command
- From: Heinrich Rebehn <rebehn@xxxxxxxxxxxxxxxxx>
- Date: Fri, 29 Feb 2008 18:53:15 +0100
Marius Gedminas wrote:
On Fri, Feb 29, 2008 at 05:40:27PM +0100, Heinrich Rebehn wrote:
1. You should not use dd to copy a filesystem that is currently mounted,
because parts of it may be cached in RAM. The copy would be
inconsistent. So you better boot from a ubuntu CD.
2. Standard dd does not have a "progress bar" option. However, it will
report its progress when sent a SIGHUP.
The manual says SIGUSR1, not SIGHUP.
Sorry! :-(
3. I don't know, make measurements yourself. 1440 is a somewhat strange
value, use a multiple of 512 (The standard blocksize)
I usually stick with bs=1K.
Marius Gedminas
-Heinrich
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