vsphere 5 ha .... doesn´t detect hba shortage

Hi,

I have 2 vsphere version 5 configured as HA. I have a san storage connected to each vsphere.

Each vsphere have 1 hba and 4 nic cards.

If I unplug one vsphere from the power cord .... HA works and migrates all Vm guest machines to the second vsphere.

If I just unplug the HBA cable from one Vsphere (to simulate a hba connection problem) ... those VM guest machine  don´t migrate to the second vsphere .

Why ?

Best Regards

Racy
decioracyAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Your HOST ESX server has not FAILED!

therefore HA will not restart VMs on another host server.

Automatic detection of server failures. HA automates the monitoring of physical server availability.  HA detects physical server failures and initiates the new virtual machine restart on a different physical server in the resource pool without human intervention.

To prevent storage and HBA failure, you should have two HBAs, two switches, and multiple paths to the SAN.

VMware HA - High Availability
http://www.vmware.com/products/high-availability/overview.html

   Monitors virtual machines to detect operating system and hardware failures.

    Restarts virtual machines on other physical servers in the resource pool without manual intervention when server failure is detected.

    Protects applications from operating system failures by automatically restarting virtual machines when an operating system failure is detected.



VMware High Availability (HA) Product Briefs

http://www.vmware.com/pdf/ha_datasheet.pdf
http://www.vmware.com/files/pdf/VMware-High-Availability-DS-EN.pdf

VMware vSphere Availability Guide ESX 4.1 vSphere
http://www.vmware.com/pdf/vsphere4/r41/vsp_41_availability.pdf
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