Re: Using dd to copy a disk.

[Ron Johnson <ron.l.johnson@cox.net>]

On Mon, 2003-07-28 at 15:59, Bret Comstock Waldow wrote:
> On Mon, 2003-07-28 at 15:53, Bill Moseley wrote:
> >  I need to clone a disk.  The source is a 3ware hardware RAID 1 array.  
> > >From Linux it looks like /dev/sda
> 
> <snip>
> 
[snip]
> I do it this way:
> date; dd if=/dev/hda of=/dev/null bs=512; date
> 'cause I'm interested in how long it takes...

This might be more useful:
time dd if=/dev/hda of=/dev/null bs=512

Example:
$ time dir
total 12720
drwxr-xr-x   94 me       me    16384 Jul 28 16:09 ./
drwxrwsr-x   11 dnet     dnet   4096 Nov 28  2001 ../
drwx------    2 me       me     4096 Jan 25  2002 .AbiSuite/
-rw-r--r--    1 me       me       59 Aug  7  2002 .Audacity
[snip]
-rw-r--r--    1 me       me       47 Aug  8  2002 xsm.txt
-rw-r--r--    1 me       me       81 May  7 09:23 zap.evo.index.sh
 
real    0m0.558s
user    0m0.030s
sys     0m0.000s


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| Ron Johnson, Jr.        Home: ron.l.johnson@cox.net             |
| Jefferson, LA  USA                                              |
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| "I'm not a vegetarian because I love animals, I'm a vegetarian  |
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