[SOLVED] dd doesn't copy from /dev/null

To compile a large application using IPO I need a lot of memory, more than the 1 GB RAM + 1 GB swap on my system. In order to create an extra (temporary) swap file I need to create a large, empty file. For this purpose I did
# dd if=/dev/null of=/large_partition/swapfile bs=1K count=1024G
But dd always returns
0+0 records in
0+0 records out
0 bytes (0 B) copied, 2.7727e-05 s, 0.0 kB/s
(time may vary.) Copying an ordinary file using dd works as expected.
What could be wrong (with /dev/null)?
Last edited by Marcel- (2010-03-31 22:10:42)

/dev/null is a 'black hole', it discards every data and you can't use it this way. I think you should try /dev/zero instead.

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[SOLVED] dd doesn't copy from /dev/null

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