Hi Tom, We have used the SnapShot process on a STK V2X ( eariler model ) and we have used FlashCopy on a HDS9980V. We have not experienced any subsystem performance issues with either subsystem. The issue we did encounter was trying to explain to management why we needed 'more DASD' on the HDS9980V vs. the STK V2X. As you may know, the answer is the way the STK V2X 'stores' data, especially as a result of the SnapShot process versus the way IBM, EMC & HDS 'stores' data. I think STK calls it: Log Structured Array. To me, its description sounded like 'virtual DASD'. Maybe 'virtual' anything wasn't cool 10 years ago when STK designed the Iceberg box.
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