Date: Sun, 25 Jan 2009 08:21:29 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Comfortable dd bs= parameters for different media Message-ID: <874ozndhxy.fsf@kobe.laptop> In-Reply-To: <20090125021111.90661db0.freebsd@edvax.de> (Polytropon's message of "Sun, 25 Jan 2009 02:11:11 %2B0100") References: <20090125021111.90661db0.freebsd@edvax.de>
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On Sun, 25 Jan 2009 02:11:11 +0100, Polytropon <freebsd@edvax.de> wrote: > Hi, > > I'd like to ask which sizes are comfortable to use for reading > from different media using the dd utility. As far as I know, > these are good values: > > Format Device (example) bs= > ------------- --------------------- ---- > Data CD /dev/acd0 2048 > Music CD /dev/acd0t01 2352 > DVD /dev/acd0 2048 (?) > Hard disk /dev/ad0s1g 1m (?) AFAICT these are fine. > What about copying partition-wise from a hard disk to a dd file? > Which bs= parameter would be encouraged to use? Presumably the destination file will also be on hard disk (or USB flash, or SSD). It may be ok to use 1m then :)
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