Since you say both disk and tape is affected, the fabric should be a good starting point. Check of invalid transmission words, CRC and other frame errors on the switches. They can be an indicator of dirty cables, bad SFP's or connections. Although I would expect the IOS messages on both systems.
Thanks, Chris Burgess EMC² where information lives Phone: 1-800-445-2588 x42149 1-508-249-2149 Fax: 1-508-544-2076 Email: [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Ibm Main Sent: Friday, January 28, 2011 8:26 AM To: [email protected] Subject: IOS050I Hi, at our installation we ara having some conectivity problems. We have two sites (S1 and S2), with two z10 EC (z/OS 1.11) each, connected via FICON cascading. When some system in S1 writes in tape or disc at S2 we get lot of IOS messages: IOS050I CHANNEL DETECTED ERROR ON 8AB9,98,E7,**02,PCHID=0400 At the beginning everything worked well, but in the last weeks some JOBs are failing. We have checked all fibers involved in the communication, changed FICON SFPs, and no way to get rid of the message. Any ideas what can be issuing the message? Thanks! Regards, Chrstian. ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
