Roy, The various posts have mentioned a few things that we can do with the USP (and previous generations), and some sites have been able use achieve this dual personality - but only after some very careful planning.
However, just because you can do something doesn't mean you should do it. As Radoslaw mentioned, we can also use this capability to do TrueCopy between a unit emulating 2105, and another unit that only supports 3990 emulation (e.g. from Lightning 9900V to 7700E.) In the TrueCopy case, it means that PPRC commands cannot be used to manage the storage because the OS wants to see 2105 format commands with the LSS specified, but the controller rejects the commands because TrueCopy is dealing with a 3990. This is one of the reasons why we do not recommend this sort of dual personality setup. Michael and I have talked offline and your comment regarding toleration for 2105 devices genned as 3990 may be what he is looking for. Ron > > BTW the actual CU type defined in HCD doesnt really do anything except > allow HCD to perform constancy checking and feature filtering when you > define devices. As far as the HW goes, (ie the IOCDS) it is just mainly > description > > Regards > > Roy > > ---------------------------------------------------------------------- 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
