I guess I was taking it at a little lower level. To me SAN is the FBA devices and the mainframe is CKD. But the storage array is a SAN box. Internally it will depend on the definition of the disks and how that the DASD is mapped to (to me that is) whether it is truly a SAN device or a Mainframe device.
I do miss the old days of physical devices rather than these new fangled emulated devices. But there must be progress. So even though the Storage Array is more or less a "virtual" emulation of a 3390-x, to me it is still a physical 3390. And it does not really matter what hardware vendor is used, IBM, EMC or Hitachi. What matters is how you setup your primary site and backup site or GDPS processes. With IBM/Hitachi I think you have the PPRC, XRC and Flashcopy processes. With EMC I have SCF, RDF, Consistancy Groups and Replication. I am not using a lot of detail due to the Ops generalized request. I was trying to respond based on the use of replication with EMC. I am not part of the SAN team that deals with the entire storage array. I just ask for more disks and they cut them out for me. So all I get to do is the INIT, or Clip and add into the mainframe environment. I do not get to play with BCVs or the bin files on EMC. Nor do I get to play with the connections like the Dense Wave or Cisco Routers. Which I think leaves me a bit more in the dark than I like. So if I am still off, it is due to a mis understanding on my part of the whole. Lizette > > Lizette Koehler wrote: > [...] > > We are always on Mainframe dasd never SAN. And as RS pointed out, > the > > mainframe does not use SAN. We live on a DMX where SAN and mainframe > share > > the box but not the disks. > > Lizette, > R.S. claimed exactly contrary opinion. There are no non-SAN disks. > In other words ALL mainframe disks are SAN-attached. > > OK, the answer was tricky and perverse a little bit. <g> > But - what is a definition of SAN? > > Leaving history, Bus&Tag channels, etc. - we have FICON channels > connected through a switch (optional) to a DASD array. > Exactly the same equipment and physical topology is needed for FCP. > > So, mainframe uses SAN, but usuallly not SCSI commands (with the > exception for FCP). ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
