HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-0204, January 2010)

Figure 27 Results of the vshadow.exe -p m: command in the DOS command prompt window
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Figure 28 shows an example of the hierarchical snapshot structure that is created on the VSM.
Both the PiT name and the snapshot name include the initial part of the shadow copy set number.
Microsoft Volume Shadow Copy Service88