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# harvester
a
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t
In case you didn’t know Longhorn is the default storage class for Harvester. In the GUI you can create a storageclass with 1 replica. You are correct, the default is 3. 1 copy per server. When using a SAN you should use the CSI instead of connecting the drives directly to the nodes. Are you FC or Iscsi?
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l
Hi mr.andy @thousands-advantage-10804 tks for answer my question . I use IScSi for SAN . Would you mind sharing any documentation or best practices for configuring Harvester to work with a CSI driver, if available? Thank you in advance!
and if i install CSI driver , can it backup and snapshot(like longhorn ) ?
t
Take a look at https://docs.harvesterhci.io/v1.5/advanced/csidriver. There are others that are not validated yet.
Also take a look at

https://youtu.be/5VB8fHJuAQQ?feature=shared

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l
tks sir