Re: This is Exactly in LIne with My Thoughts....
"Invista was out of the data path" - nope, not true. This product is long gone, so discussion is purely academic though.
"Invista relies on Split-Path Architecture (SPA) to manage data flows. The intelligent switch redirects all control commands (e.g. SCSI Inquiry, Read Capacity, or Report LUNs) to a pair of redundant external controllers called Control Path Cluster (CPC), while the stream of I/O transactions flows directly from the host to the appropriate physical storage array via the intelligent switch hardware"
StorAge (also dead) was out of data path, as splitting of the IO was done in the host, via special driver