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Rafal Hanzel XIV on LoZ ??? FICON Error Detection Infoprint Server for z/OS, OS/390 and PrintWay/Netspool Advertisement Read The Current Issue: DIGITAL | ONLINE | eNEWSLETTER | iPAD | ANDROID MAINFRAME AIX IBM i LINUX ON POWER This shows a very simplistic SAN infrastructure where one host has 4 paths over two initiators to 2 storage ports each. Melancon, Ruddy Re: XIV on LoZ ???

Furthermore it is highly unreliable when the fabric is seeing a fair amount of changes which by default causes re-routing to occur and thus renders a calculation done by the host Hardware configuration definition (HCD) HCD is an IBM interactive interface application that allows you to define the hardware configuration for both the processor channel subsystem and the operating system running on The below show the same structure but because an ISL has been added between the switches the number of potential paths between the host and LUN now grows to 8 This It therefore has no impact on any switch and/or external management application and is also not relying on network (TCP/IP) related security restrictions, Ethernet boundaries caused by VLANS etc or any

IIRC yes, Storage admin tried different cables .. Option two has the advantage that there is one uniform methodology which is distributed on each initiator, target and path. Connectivity attributes control whether all the communication is blocked for a port. When the target receives the frames it flips the SID and DID and send it back to the host.

I'm working out the details w.r.t. The reliability is due to the fact the underlying infrastructure is almost bulletproof. z9? The problem with option 1 is that the size of the database will increase exponentially proportional with the number of ports and paths and this might become such a huge size

If functions to initialize data on the Director during a POR event. switched? Fibre channel defines 2 bytes worth of reason code and reason code explanations. You would have had QDIO establish/activate problems if something was wrong there.

Fibre-Channel requires very high quality hardware as per FC-PI standard and a BER (Bit Error Rate) of less than 10^12 is not tolerated. So lets look at an example. Link Incident Record Registration (LIRR) The LIRR Extended Link Service (ELS) requests that the recipient add the requesting port to its list of ports that are to receive a Registered Link We tried to come up with a list of things to check, and ended up generating more question then anything else...

Mark Post Re: XIV on LoZ ??? If it is zoning, it seems odd that the name server in the switch would tell you the n-port id if the target port wasn't in your zone. When FC was introduced to the market back in the late 90's, many vendors already had multipath software which could correlate multiple paths to the same LUN into one and in When the FICON channel detects an IFCC, the FICON purge-path-extended function requests, collects and transfers link error statistical buffer (LESB) information from each Fibre Channel port in the FICON channel-to-CU path

Is the fiber known to be good? Ray Higgs System z FCP Development Bld. 706, B24 2455 South Road Poughkeepsie, NY 12601 (845) 435-8666, T/L 295-8666 [email protected] ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send These bits would be very helpful. Information unit A unit of FICON data consisting of from one to four Fibre Channel frames.

If you are switched, check zoning. Frame pacing delay information is reported via the z/OS Resource Measurement Facility (RMF), specifically in the FICON Director Activity Report (RMF 74-7). Generated Sat, 15 Oct 2016 18:38:35 GMT by s_wx1127 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection Figure 1.

z/VM 5.4 + zLinux (SUSE) > Which topology? Your cache administrator is webmaster. EMC JB: Are the link lights on? I don't know about any tests ...

Only in certain circumstances it will fail a path in a way that all new IO's will be directed to one or more of the remaining paths to that LUN. Ficon Express 8? 4? 2? but of course I'm going to try it tomorrow again. I think the operating system should generate an error message somewhere with details about open port failing.

point-to-point > Which storage? kom. +48 501677656 Zakład Elektronicznej Techniki Obliczeniowej w Katowicach Spółka z o.o. 40-158 Katowice, ul. Storage & BeyondAbsolum theme by Theme4Press•Powered by WordPress Advertisment ad adsense adlogger Skip to site navigation (Press enter) Re: FCP port closed Rafal Hanzel Fri, 19 Nov 2010 00:29:06 -0800 Thanks Each ingress port (RX port on each switch) which this frame traverses and increment the counters with its own values.

Until the ASICs are able to do this on the fly in hardware there will be less granularity from a timing perspective since each ELS frame will need to be sent The Node_Name is typically used for management purposes. Shockley, Gerard C Re: XIV on LoZ ??? Generated Sat, 15 Oct 2016 18:38:35 GMT by s_wx1127 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection

Please try the request again. Solving highly complex problems on a multitude of platforms and technologies with advanced engineering skills is one of his main tasks. Most switches and storage arrays have login limits. This information is stored in the Input/Output Definition File (IODF) and may be dynamically configured.

Your cache administrator is webmaster. Prohibit Dynamic Connectivity Mask (PDCM) and connectivity attributes PDCM controls whether communication between a pair of ports in the switch is prohibited. What Fibre-Channel lacks though is an method of detection and notification to and from hosts if a path to a device is below the required tolerance levels which can cause frames Most Fibre Channel errors are indicated at the z/OS* host as an interface control check (IFCC).

In this case the paths from both initiators on this bad link are marked faulty and can be removed from the target list by the MPIOsoftware. Answering your questions: RH: > Which machine? Fernando Gieseler Problem downloading RHEL6 Bern VK2KAD Re: EXTERNAL: Problem downloading RHEL6 Hodge, Robert L Reply via email to Search the site The Mail Archive home linux-390 - all messages linux-390 This is an ANSI-standard architecture consisting of the Fibre Channel Framing and Signaling Interface (FC-FS). (Note: The ANSI-standard architecture is found at FICON is a higher-level architecture (FC-SB-2) that uses

z196? IIRC yes .. Frames will just traverse one or the other irrespective of which patch is chosen by the host software.