Couple of questions,
1> Did you tried to ping both Controller management IPs at the time of the issue you faced?
2> Are you sure that both controller physically was down means no LED at all on Controllers?
3> Do your Volumes presented with all host ports of both controllers?
4> Did you verified that host were up that time and not rebooted?
You can also check if multi-path properly configured at host end and if Round-Robin policy set or not.
Also, if you wish to check other components on your array you can perform an MSA Health Check here:
www.hpe.com/storage/MSAHealthCheck
Download your MSA Log File from your MSA array
Upload the MSA Log File into the MSA Health Check website
Review Results by clicking through the tabs and saving the PDF report
Links to array, enclosure, and drive firmware will be provided
WIthout entire log check it will be difficult to tell anything.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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