Lost connectivity to storage device

[steve72]

Hi,

One of the event indicates a loss in connectivity to the specified storage
device(Stonefly's opti SAN). The path indicated is the last path that went down.
Example
The following is an example of an error for this type of event:
Lost connectivity to storage device naa.
60a9800043346534645a433967325334. Path vmhba35:C1:T0:L7 is down.
Affected datastores: "Storage1" Impact
Any virtual machines using the affected datastore may become
unresponsive.
If the service console root file system is on the affected datastore,
then the service console becomes no responsive and you cannot manage
your ESX host.

I have been facing intermittent path loss.

kind regrads,
Steve

[Shen]

I guess it is caused by ESX multipathing. If ESX has issue to connect to one target portal and it happens to use round-robin load balance policy, you will see this error. Any virtual machines using the affected datastore may become unresponsive. However, since there are still path to the lun, VMs are not affected. You can check load balance policy on ESX and use Fixed policy. This will make it active/passive. If you have multiple LUNs, you can force ESX to use different active path for each LUN.

[Patio]

I recommend you to do a check on the network devices, This may be due to a bad LAN card, switch or router. Even cables play an important role in connectivity and hence should not be neglected. Hope this is useful...