linux-kernel - Re: [PATCH] sd: do not set changed flag on all unit attention conditions

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Date:	Tue, 17 Jul 2012 22:59:50 +0100
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] sd: do not set changed flag on all unit attention
 conditions

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


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