RE: Drivers: scsi

[KY Srinivasan]

> -----Original Message-----
> From: James Bottomley [mailto:James.Bottomley@xxxxxxxxxxxxxxxxxxxxx]
> Sent: Sunday, November 04, 2012 4:39 AM
> To: KY Srinivasan
> Cc: gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> devel@xxxxxxxxxxxxxxxxxxxxxx; ohering@xxxxxxxx; hch@xxxxxxxxxxxxx; linux-
> scsi@xxxxxxxxxxxxxxx
> Subject: Re: Drivers: scsi
> 
> On Sat, 2012-11-03 at 09:40 -0700, K. Y. Srinivasan wrote:
> > Do we currently support dynamic re-sizing of LUNs. Hyper-V can
> > notify capacity change via sense data and I was wondering if this
> > is handled in the generic scsi code.
> 
> Depends what you mean by "dynamic".  Experience shows that most users
> really don't want all this to happen without manual intervention
> (particularly on shrink).  However, we have the mechanics in place.
> Just send ASC/Q 2A/09 and it can get vectored up to LVM which resizes
> the volume and can be scripted automatically to resize the filesystem.
> 
> hypervisor people tend to have problems with scripting, so there are
> some hacks that do this outside of the normal event system ... see for
> example virtio_scsi.c

Thanks for the prompt response.

Regards,

K. Y
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