Author: Guest Post

LUN Path Failover Conditions

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Ever wonder what condition caused your ESX server to fail a LUN over to another path? VMware has written a detailed KB article about this and cited examples for each scenario: http://kb.vmware.com/kb/1003433 The main 4 conditions are: NO_CONNECT ILLEGAL_REQUEST NOT_READY INTERNAL ERROR The majority of these conditions are exclusive to Active/Passive arrays (MRU policy) as
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HP Insight Manager Agents Causes SCSI Reservation Conflicts

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While there are many reasons SCSI reservation conflicts can occur in a shared LUN environment, sometimes vendors write agents without knowing the full impact they could have in various environments they do not fully test. In HP’s case, there are 2 agents that are part of the Insight Manager suite that are responsible for excessive
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