[dm-devel] Next set of device-mapper patches

[AJ Lewis]

On Wed, Jun 21, 2006 at 01:44:15PM +0200, Milan Broz wrote:
> ioctl patch simple route ioctls to underlying block device
> -> it supports all ioctl which are supported by your physical device.
> 
> e.g.
> in simple case you have volume /dev/mapper/VolGroup00-LogVol0
> mapped to physical device /dev/sda, inquiry ioctl (using tools from 
> sg3_util)
> sg_inq /dev/sda   
> 	is the same as
> sg_inq /dev/mapper/VolGroup00-LogVol0
> 
> In the case of multipath target ioctl command is sent through
> active path.

So what happens when you have multiple block devices in the volume?  And what
if those block devices have different levels of support for the ioctls?
 
--
AJ Lewis 
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