ESXi Datastore High Availability / Fault Tolerance
Posted on 2014-03-13
Right now we have 3 servers, all with Enterprise Plus licenses, all connected to a single iSCSI SAN. When it comes to redundant server resources, ESXi has us covered, but there's one issue I can't get by and that is the single failure point of the SAN having the potential to bring down our whole VM environment.
How does VMware handle/avoid this scenario?
Do we have to get a secondary/redundant SAN?
Let's say I have 3 servers, all with the OS Raid 1, and then each with a 5TB capacity raid for storage.
Is there a way set up each 5TB array as HA/FT storage? perhaps storing VMs independently of the server hosting each VM?
For example, let's say I have a VM and 2 ESXi servers (Server A and B).
The VM is hosted on (Server A) and the storage is on (Server A Storage)
If server A's datastore goes down can (Server B Storage) be set up to take over the data?
It doesn't matter if A or B handle the resources.
Is this possible?
I'm trying to figure out how to HA/FT storage without having to have 2 SANs.