???
Could you explain the limitation?
Do you mean limit of logical paths per chpid? Caution: it depends on the
controller, different limits can be in case of HDS Lightning and EMC DMX.
Regarding switches - this is first time I heard the use of switches
change the limit.
In simple scenario, #
It is the number of possible paths from an LPAR through connections
and directors to the device.
If you have 4 CHIPIDs assigned to an LPAR to a Director, then 8
connections to a second Director then 8 connections to a DASD unit you
have 4 * 8 * 8 paths and you are at your 256 path limit.
The LPAR
We have a simple config here, 1 lar and FICON cables run directly to CPU.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Mike Schwab
Sent: Wednesday, January 01, 2014 7:19 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: IODF Channel
W dniu 2013-12-31 15:26, Dazzo, Matt pisze:
We have a new IBM DS8870 that I have to define to the IODF. We are going to
have (16) 2107 type LCU's controllers and about 3k total devices defined to
those 16 LCU's. We also have 16 FICON channels available to use, I was thinking
about defining 8
The total number of paths must be kept at 256 or less.
With 2 cascading directors:
(LPAR - CNTRL1) * (CNTRL1 - CNTRL2) * (CNTRL2 - DASD).
4 * 8 * 8 would be 256.
With a single director 16 * 16 is possible but not usually needed.
On Tue, Dec 31, 2013 at 8:26 AM, Dazzo, Matt mda...@pch.com wrote:
We have a new IBM DS8870 that I have to define to the IODF. We are going to
have (16) 2107 type LCU's controllers and about 3k total devices defined to
those 16 LCU's. We also have 16 FICON channels available to use, I was thinking
about defining 8 channels to each LCU.
We currently have 4
