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SAN Storage disconnected

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I have question regarding the SAN storage, when it goes offline.

My setup contains few vm's which is stored in SAN (Basically C Drive was using SAN).These vm's were all powered on, logged in and in some state. SAN went offline for few min's , that is, it has been crashed.

At this point of time , though I was not able to access my vm's , all of them were pingable. When datastore was up and running, all VM's were accessible.

Surprisingly, they were all in the same state as in before the datastore crash. I expected the vm's would also have been crashed when datastore went offline.

Can somebody explain, how this works and why dint the vm's using this storage dint crash



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What type of SAN and networking are you using? Also you didn't mention the type of VM hypervisor. The hypervisor could have detected a storage I/O problem and put all VMs into standby and then resumed them when the storage came back online.

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