Volume Shadow Copy Service error in App Event Log on iSCSI Target

The following error appears twice every 60 seconds in the Application
Event Log. I can't find anything in the Microsoft Knowledgebase that
can help me.

Volume Shadow Copy Service error: Error calling a routine on the Shadow
Copy Provider {b5946137-7b9f-4925-af80-51abd60b20d5}. Routine returned
E_INVALIDARG. Routine details
GetSnapshot({00000000-0000-0000-0000-000000000000},000A21C0).

The server is Windows Storage Server 2003 SP1, Wintarget 2.0 Advanced,
with one iSCSI volume defined and mounted by a remote host. The
message has only started to appear in the last day or two, and the
iSCSI client seems to be working just as good as usual.

I've checked the Shadow Copies configuration screen on both servers,
and it is disabled for all drives.

Any help or guidance would be appreciated.

.

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