Date: Wed, 27 Mar 2013 23:45:12 -0700 From: "Ronald F. Guilmette" <rfg@tristatelogic.com> To: Quartz <quartz@sneakertech.com> Cc: freebsd-questions@freebsd.org Subject: Re: Copying memstick image to a USB (flash/thumb) drive Message-ID: <14008.1364453112@server1.tristatelogic.com> In-Reply-To: <5153A2FD.8020804@sneakertech.com>
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In message <5153A2FD.8020804@sneakertech.com>, you wrote: > >> Why exactly is the "bs=10240" is there? Wouldn't the default of 512 >> do just as well? > >Modern systems can read and write far more than 512 bytes per operation. >Sticking with 512 would work perfectly fine, but you'd be imposing an >unnecessary bottleneck and the copy would be a lot slower overall. >Whether 10K is optimal or not depends on the exact hardware you're >messing with (it looks pretty low to me, I'd suggest more like 1M). I agree. And 10 kibibytes is probably quite a bit less than optimal. I have filed the following PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=177431 Thank you for your reply. Regards, rfg
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