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Subject: Re: [PATCH] sd: do not set changed flag on all unit attention
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From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, linux-kernel@vger.kernel.org,
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Date: Tue, 17 Jul 2012 22:59:50 +0100
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On Tue, 2012-07-17 at 12:36 -0400, Christoph Hellwig wrote:
> On Tue, Jul 17, 2012 at 10:11:57AM +0100, James Bottomley wrote:
> > There's no such thing in the market today as a removable disk that's
> > resizeable.  Removable disks are for things like backup cartridges and
> > ageing jazz drives.  Worse: most removeable devices today are USB card
> > readers whose standards compliance varies from iffy to non existent.
> > Resizeable disks are currently the province of storage arrays.
> 
> The virtual disks exported by aacraid are both marked removable and
> can be resized.

So what are properties of these things? ... or is this just an instance
of a RAID manufacturer hacking around a problem by adding a removable
flag?

James