Bryce Nesbitt wrote: > We have Dell 1950 and 2950 servers with DRAC version 1.20 firmware, and > normally use putty or OpenSSH to connect. As far as well can tell the > serial 'break' does not equate to the SysRq key as documented. > > These servers run Debian Linux, and we periodically have problems with out > of control memory situations. We could save servers from a hard reboot by > sending Magic SysReq commands such as "m" and "f" (to dump Linux Kernel > memory stats and invoke the Out of Memory Killer (oom-killer). Or make a > reboot nicer by syncing disks first. These commands work fine directly from > an attached keyboard (e.g. Alt-SysRq-m). Can we get Magic SysRq over DRAC5
I unfortunately had an opportunity to test this with a 1950 and DRAC Firmware 1.51. While the Macros (Alt+SysRq, Alt+Printscreen) are useless, the Java based virtual Console under Windows in full screen mode does pass Alt+SysRq properly. I'd suspect that this could work from Linux clients as well if Magic SysRq ist disabled locally. I have used serial Break to trigger Magic SysRequests on my personal Linux Server(s) in the past, but it appeared to be rather picky about the timing. I assume that this requires the system console to be on that specific serial port, just having a getty listening will not be sufficient. Rainer _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
