Running VSS API calls with the vsreq.exe sample program
The Volume Shadow Copy Services (VSS) Software Developers Kit (SDK) contains the vsreq (VSS requester) sample program. The VSS requester program performs a sequence of VSS API calls like the calls that are performed by the backup-archive client.
You can compile and run vsreq.exe on the failing system to determine if vsreq and IBM Storage Protect encounter the same problem. If vsreq can reproduce the same problem as IBM Storage Protect, then the output of vsreq can be supplied to Microsoft support to help in diagnosing the VSS problem.
In some cases, Microsoft provides an input/output (I/O)
subsystem analysis tool (yapt
) to gather I/O performance data
for analysis. vshadow is a tool that is also available
as an alternative to vsreq.