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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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