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Date:      Wed, 01 Feb 2006 15:34:21 -0700
From:      Scott Long <scottl@samsco.org>
To:        =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
Cc:        Peter Jeremy <peterjeremy@optushome.com.au>, babkin@users.sourceforge.net, src-committers@freebsd.org, cvs-all@freebsd.org, cvs-src@freebsd.org
Subject:   Re: cvs commit: src/release Makefile
Message-ID:  <43E1376D.4080707@samsco.org>
In-Reply-To: <86wtge4so4.fsf@xps.des.no>
References:  <9170456.1138812837533.JavaMail.root@vms171.mailsrvcs.net> <86wtge4so4.fsf@xps.des.no>

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Dag-Erling Smørgrav wrote:
> Sergey Babkin <babkin@verizon.net> writes:
> 
>>A 30MB image gets loaded from CD in no time, but loading it from an
>>USB flash drive took almost forever, easily half an hour or
>>so. Maybe the BIOSes became more clever since then.
> 
> 
> It should not take more than ~30 seconds, even with USB 1.x.  If it
> takes half an hour, I suspect GRUB is doing something stupid like
> reading it one sector at a time (requiring a switch to x86 mode for
> every 512 bytes read)
> 
> DES

We already do one sector at a time, I believe, to work around buggy
CF flash implementations.  Still, I don't see how it could take 30
minutes unless there were other problems at play.

Scott




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