5.1 ESXi does not see any number of logical unit after restarting both MD3220 and R820

We restarted our host R820 ESXi 5.1 and table connected to SAS MD3220.  After the reboot, the HBA on ESXi shows no device.  We turned on the MD3220.  WAITED 5 minutes before feeding the R820.

FYI... the complete Setup includes two R820 connected to two MD3220 through SAS.  The two R820 cannot see all devices on two HBAs after reboot.  We have redundant RAID controllers on the MD3220s and redundant HBA on the R820s.

On the MD3220, the status of host interface ports appears.

Anyone know this problem?

We found the problem.  On the MD3220s, we noticed some "unidentified host identifiers.  For a reason unknown to us, the host port identifiers changed after turning power off and power on all R820s and MD3220s.  To resolve this problem, we replaced the identifiers.  It seems that someone swapped the SAS cables.  I don't think that someone made.

Tags: Dell Tech

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