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Date: Wed, 2 Feb 2011 21:09:35 +0100
From: Kurt Jaeger <pi@opsec.eu>
To: Alexander Best <arundel@freebsd.org>
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X-Mailman-Approved-At: Wed, 02 Feb 2011 20:52:38 +0000
Cc: freebsd-current@freebsd.org
Subject: Re: looking for a fast way to dump a dvd to a file on my hdd
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Hi!

> please not that this is an atapi drive, but i'm using ATA_CAM.
> 
> so far dd(1) with a bs=2048 finished after:
> 
> 4676648960 bytes transferred in 1639.108763 secs (2853166 bytes/sec)
> 
> ... this drive is capable of reading dvds at a speed of 16x. [1] tells me,
> that this means the entire disc (SL) should have been read after ~ 4 minutes.

Try

dd ibs=2048 obs=64m

which would buffer large amounts before writing it out.

-- 
pi@opsec.eu            +49 171 3101372                         9 years to go !