Hello,
I am implementing a Volume Shadow Copy Service (VSS)
Hardware Provider for storage box of my company.
The storage box is a DAS RAID device. It exposes
volumes as SCSI disks to the initiator.
I wish to take snapshot of the volumes created on
these SCSI disks using the hardware provider. Please
note that snapshot logic is already implemented by the
storage box.

I have written a simple Provider and registered it
on Windows 2003, which does nothing, but just traces
the function calls. The problem is that when I call
vshadow(i.e. a sample requester available from
Microsoft), on the NTFS volume created on
this SCSI disk, the call never comes to my Provider.
It even does not even call AreLunsSupported().

I even tried calling just my provider from the
requester, but still without the call going to
AreLunsSupported(), I am getting the error -
VSS_E_VOLUME_NOT_SUPPORTED_BY_PROVIDER.

Can anyone tell me, what is that I am missing? Does
the Windows VSS service not call all the providers to
inquire, whether it supports a disk?
To my knowledge it should call AreLunsSupported().
Is it something else, that is calls ?

Please note that I have not written VDS Provider for these
disks.

Thanks in advance.
Priya