linux-kernel - Re: [PATCH] scsi/sd: Fix size output in MB

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Date:	Sat, 30 Aug 2008 16:36:00 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Pierre Ossman <drzeus-list@...eus.cx>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Simon Arlott <simon@...e.lp0.eu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] scsi/sd: Fix size output in MB

On Sun, Aug 31, 2008 at 12:13:14AM +0200, Pierre Ossman wrote:
> On Sat, 30 Aug 2008 16:45:49 -0500
> James Bottomley <James.Bottomley@...senPartnership.com> wrote:
> > Does MMC have the 10^3 requirement like SCSI/ATA disks do, or can you
> > use 2^10 like standard computer stuff for capacities?
> 
> Some do, some don't. I prefer the 2^10 and MiB variants as it avoids
> ambiguity.

I think the most compelling reason for ensuring they're the same is
that you can plug these devices into both an MMC slot directly and a
card-reader and have them show up over USB.  You don't want the reported
capacity to change when you do that.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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