What is an SVC dump? Why would a mainframe operator need to take a dump from SVC storage?
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
The SVC in IBM's storage virtualization system stands for System Storage SAN Volume Controller. The product is designed to improve administrators' control of storage resources, but when there's a problem, you'll need to troubleshoot with an SVC dump.
The book OS/390 MVS Diagnosis: Tools and Service Aids sums it up nicely: "SVC dump is like a burglar alarm ... It lets you know something's wrong and helps you pinpoint where it started."
An SVC dump provides a representation of the virtual storage for the system at the time the dump is taken. Most commonly, a component requests an SVC dump when an unexpected system error occurs. After the dump has completed, processing can usually continue.
An authorized program can request an SVC dump with the c macro. The operator can also request a dump by using the SLIP or DUMP command. Both are used to obtain diagnostic data to aid in problem resolution.
Manuals with more information on SVC, IBM's SAN volume controller:
Related Q&A from Mark Zelden
When initial program load stalls out on a mainframe logical partition, the culprit is often consoles. Connectivity is one of many potential causes.continue reading
Programming expert Mark Zelden offers some coding help to a user trying to FTP files from the mainframe to a Linux OS.continue reading
Expert Mark Zelden tries to help a reader find out if his z/OS problem is a known vulnerability. When he can't find anything, he explains how to ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.