Expert Knowledgebase
z/OS and OS/390 with Mark Zelden
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Is your z/OS problem a known vulnerability?
(02 JUN 2006)
We are running z/OS 1.6. We noticed that a Portscan including port zero repeatedly crashes the IP Stack! Unfortunately I was not able to find any hint in the known knowledgebases. Is this a known vulnerability...
FTP help
(02 JUN 2006)
How can I FTP multiple files to MVS PDS? I was able to use MPUT from PC multiple files to PDS. Now I am trying to run the batch job from mainframe to MGET files into PDS. But it doesn't recognize PDS as a di...
Storage page/page fault
(02 JUN 2006)
If my memory serves me correctly, 30 years ago the use of SECTION in a COBOL program forced a new storage page/page fault. (I don't remember what the page size was.) Does it still do that? Is the repeated us...
TCP/IP problem
(23 APR 2006)
We're running z/OS Version 1.4.10 on a 2066-0A1 z/Series 800. I need to add two new ports to TCP/IP to be used for Cobol CICS Socket programming. The ports are 3010 & 3011. EZACICD has been modified to direc...
Performance without high DASD usage
(23 APR 2006)
We are using a lot of data striping to get better performance on various files. However, we are using a ton of DASD in our stiping pools and are actually using less that 55% of it. Is there something else out...
Ethernet-converted printers
(23 APR 2006)
Some of our printers have been converted to Ethernet (TCP/IP). Is it still possible to 'vary' them off/on-line and, if so, how?
Additional communication possibilities besides "dark fiber" and DWDM
(03 MAR 2006)
We will build a Sysplex environment between two Data Centers (20 Km), only to reduce software costs (implement WLC for both mainframes). For Sysplex timer (ETR e CLO) e Coupling facility (ISC) protocols there ...
Batch FTP
(03 MAR 2006)
I do an FTP get against a production server. When I do it on our test box it creates a file of fixed block format with an LRECL of 128 bytes. When I run the exact same FTP against the same server on our produc...
Lost GDG
(03 MAR 2006)
I was testing a program on a data set that was a GDG. Today that GDG was recycled and didn't exist.
I wasn't aware of that. Is there a way to restore it by any chance?
Working with Telnet
(03 MAR 2006)
Our company decided a few weeks ago to change from native SNA connections to Telnet connections (to the
mainframe z/OS 1.4) The problem is now that with SNA our developers had the possibility to work with a 62 ...
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