Oracle VSS writer atomic ?

 Hi,

We would like to us the Microsoft VSS framework to backup a database.  The plan is to use VSS to integrate with the SAN disk array to create storage snapshots - using the disk arrays snapshot features.

The SAN disk array has a VSS hardware provider.   when the command to make snapshots of several volumes at once is executed, there can be upto a 10 milisecond delay between each snapshot creation.  If we have tablepsaces that span many volumes and we create a snapshot while the volumes are being written to, then write ordering can get messed up and split block writes can occur - causing corruption.