Have you encountered issues collecting vmcores on kernel panic?
- Have you encountered any situations in your environment that prevented your RHEL 5 or RHEL 6 system from capturing a vmcore using kdump?
- Which method outlined in the article I linked do you prefer to use for collecting a vmcore?
- Do you have any suggestions to improve the vmcore collection mechanism in RHEL?
Responses
Hi David,
I can definitely confirm this. Sometimes it is a hardware issue that causes kdump to not capture a vmcore successfully. For instance, a faulty disk controller could potentially cause a panic and then become unavailable. In this instance it is likely that you won't get a vmcore. An alternative here would to be use another capture method such as NFS, SSH or SAN.
Having said that there are still times when I am not sure why kdump simply won't capture a vmcore. If anyone has some instances of this to relate I would also be curious to hear about them.
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