Date: Thu, 3 Feb 2011 03:19:44 -0800 From: Xin LI <delphij@gmail.com> To: gljennjohn@googlemail.com Cc: freebsd-current@freebsd.org Subject: Re: looking for a fast way to dump a dvd to a file on my hdd Message-ID: <AANLkTimdexcwAcTJ0-PRUkiyBqffH_bv%2BCiSEOAucqtq@mail.gmail.com> In-Reply-To: <20110203120723.27025c31@ernst.jennejohn.org> References: <20110202195441.GA39963@freebsd.org> <4D49B8EA.4060904@delphij.net> <20110202210211.GM65811@acme.spoerlein.net> <20110203120723.27025c31@ernst.jennejohn.org>
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On Thu, Feb 3, 2011 at 3:07 AM, Gary Jennejohn <gljennjohn@googlemail.com> wrote: > On Wed, 2 Feb 2011 22:02:11 +0100 > Ulrich Sp=C3=B6rlein <uqs@spoerlein.net> 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=3D2048 finished after: >> > > >> > > 4676648960 bytes transferred in 1639.108763 secs (2853166 bytes/sec) >> > >> > Just curious - how will recoverdisk(1) perform? =C2=A0I 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). >> > > And are these hacks available to the general public somewhere? I think recoverdisk already support using DIOCGSECTORSIZE to obtain underlying sector size and I don't think it's really needed to hack it? I think, maybe uqs@ mean one need to "hack" the CAM subsystem to make the system believe that DVD have sectorsize of 2352 bytes for some special purpose backup? Cheers, --=20 Xin LI <delphij@delphij.net> http://www.delphij.net
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