[dm-crypt] unusual writing speeds when benchmark speeds are high enough

Arno Wagner arno at wagner.name
Mon Mar 18 00:07:46 CET 2013

On Sun, Mar 17, 2013 at 05:36:19PM -0400, .. ink .. wrote:
> Sorry for my previous email without a title,resending the email with a
> title this time.
> A user of cryptsetup(through zuluCrypt) asked me a question i can not
> answer and asking it here.
> [root <at> sheep 8] ~ > dd if=/dev/zero of=test.img bs=70M count=1
> 1+0 Datensätze ein
> 1+0 Datensätze aus
> 73400320 Bytes (73 MB) kopiert, 2,58497 s, 28,4 MB/s

Is this over USB or on an USB memory-stick? If this is a
regular HDD, something seems to be slowing it down already.

Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
One of the painful things about our time is that those who feel certainty
are stupid, and those with any imagination and understanding are filled
with doubt and indecision. -- Bertrand Russell

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