Now we are ready to deep dive into vmcore analysis to confirm what went wrong in the system. In general, first thing I’m checking is the system’s log. crash> log …. …. end_request: I/O error, dev sdajm, sector 0 end_request: I/O error, dev sdajm, sector 8 end_request: I/O error, dev sdajm, sector 0 NMI Watchdog… Continue reading

As I had mentioned in the previous article, you can launch crash analysis by running the below command $ crash vmcore vmlinux The order of the file doesn’t matter as far as the file exist there. But, there’s a time that crash command fails as a vmcore is highly incomplete. In that case, you can… Continue reading