Date: Wed, 2 Feb 2011 22:34:12 +0000 From: Alexander Best <arundel@freebsd.org> To: freebsd-current@freebsd.org Cc: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de>, Xin LI <delphij@delphij.net>, "Julian H. Stacey" <jhs@berklix.com>, Kurt Jaeger <pi@opsec.eu> Subject: Re: looking for a fast way to dump a dvd to a file on my hdd Message-ID: <20110202223412.GA64995@freebsd.org> In-Reply-To: <20110202210211.GM65811@acme.spoerlein.net> References: <20110202195441.GA39963@freebsd.org> <4D49B8EA.4060904@delphij.net> <20110202210211.GM65811@acme.spoerlein.net>
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On Wed Feb 2 11, Ulrich Spörlein wrote: > On Wed, 02.02.2011 at 12:04:58 -0800, Xin LI wrote: > > On 02/02/11 11:54, Alexander Best wrote: > > > so far dd(1) with a bs=2048 finished after: > > > > > > 4676648960 bytes transferred in 1639.108763 secs (2853166 bytes/sec) > > > > Just curious - how will recoverdisk(1) perform? I haven't tried it > > myself but it uses much larger window which could be faster. > > +1 for recoverdisk. I hacked it so that it will also cope with media > that has weird sectorsizes like 2352 bytes. It is awesome for reading > optical media now, thanks to retries, large read requests and the > ability to save progress (so you can try the failing sectors in another > drive). thanks a lot for all your replies. :) here are some statistics i gathered: LINUX: ----- 6,8 MB/s @ bs=2048 6,7 MB/s @ ibs=1M obs=64M 6,6 MB/s @ bs=32K FreeBSD: ------- 2,8 MB/s @ bs=2048 9,5 MB/s with recoverdisk /wo failures 9,5 MB/s @ ibs=1m obs=64m 9,5 MB/s @ ibs=32k obs=64m indeed recoverdisk seems to be ideal for my case. i'll try to use it more often. ;) thanks again. cheers. alex ps: seems linux is completely ignoring blocksizes, but that's their problem. ;) > > Regards, > Uli -- a13x
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