copy offload for SMB?

Christopher R. Hertel crh at
Fri Feb 22 09:21:31 MST 2013

On 02/22/2013 09:36 AM, David Disseldorp wrote:
> On Fri, 22 Feb 2013 02:40:09 +0000
> "Liujun (A)" <liujun09 at> wrote:
>> I have wrote a test to test offload feature,  the is result is that Windows server 2012  does not support offload read (FSCTL_OFFLOAD_READ).
> For the record, I think Windows Server 2k12 support for the new
> FSCTL_OFFLOAD_READ/WRITE SMBs is dependent on the underlying storage
> subsystem.

Yes.  It is akin in some ways to NDMP.

> It requires an advanced (expensive) storage array that handles

The specifics are in the T10 docs, so it's now part of the SCSI spec.  It
should be possible to support this at the lower end.

Chris -)-----

"Implementing CIFS - the Common Internet FileSystem" ISBN: 013047116X
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