Re: [Xen-devel] [RFC PATCH] xen-block: introduces extra request to pass-through SCSI commands

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Bob Liu writes ("Re: [RFC PATCH] xen-block: introduces extra request to 
pass-through SCSI commands"):
> Do you know whether pvscsi can work on top of multipath(the device-mapper 
> framework) or LVMs?

No, it can't.  devmapper and LVM work with the block device
abstraction.

Implicitly you seem to be suggesting that you want to use dm-multipath
and LVM, but also send other SCSI CDBs from the upper layers through
to the underlying SCSI storage target.

I can't see how that could cause anything but pain.  In many cases
"the underlying SCSI storage target" wouldn't be well defined.  Even
if it was, these side channel SCSI commands are likely to Go Wrong in
exciting ways.

What SCSI commands do you want to send ?

Ian.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel