Yes, each tape drive contains it's own CU. You can't really have the "same CHP" going to all the drives. Either you have a CHP going directly to a single drive, or you have a FICON switch in the middle. In either case the CUADD has no practical use, there is only one CU at the end of the fiber. In the case where there is a FICON switch involved, the link address will choose which control unit the signal goes to, the CUADD is still 0. The CUADD only has applicability when there are multiple control unit images at the other end of the fiber, as is the case with a DS8000, or any other unit that emulates more than one CU function on a single fiber connection.
>>> John Kelly <[email protected]> 2/17/2010 3:33 PM >>> <snip> According to my understanding, we need a CUADD for every controller on the FICON </snip> I'm not sure what a "SL8500 ATL with STK 10000 drives" is but your comments seem to indicate that each CU is a tape drive? Is each STK 1000 drive a contol unit and do you have the same CHP going to all of the CUs? If in fact each tape drive is a separate CU and you have the same CHP going to the various CUs, then what you have should work. BUT your symptoms, ie only 600 comes online, seems to indicate that is not the case. Sounds like you have multiple drive off the same controller, not multiple controllers. I know with the IBM 3592, I had two controllers with six drive and had to CUADR the second controller. It would help if you could explain how many drive, CUs and CHPs are involved. Jack Kelly 202-502-2390 (Office) ---------------------------------------------------------------------- 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 CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. ---------------------------------------------------------------------- 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
