Marcos Leão asked: > How to configure hardware watchdog timer? > > Scenario: > > -Dell PowerEdge R710 > -iDRAC6 > -RHEL 5.5, freeipmi, ipmitool >
ipmitool doesn't have anything useful for managing setting the hardware watchdog timer, but FreeIPMI has the bmc-watchdog command. If you are thinking about using watchdog timers on your system to automatically recover from hardware lockups and the like, I recommend that you look into the watchdog RPM (watchdog-5.6.1 is in the RHEL 5.5 repositories) - this allows both configuring hardware watchdog timer as well as performing software tests that detect hard-to-recover-from situations like severe memory depletion. You can also write your own tests, which I did for network misconfiguration, e.g. ifconfig down can make not only the main system inaccessible, but also the BMC (or DRAC, if it is using shared NIC rather than dedicated). The one gotcha is that watchdog's built-in reboot functionality does an ifdown on all interfaces, which could leave the BMC/DRAC unreachable - I bypassed that by having the handler stop the watchdog daemon, leading to a hardware reset when the watchdog timer finally expires. @alex -- mailto:[email protected] _______________________________________________ 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
