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LUNS inside a NFS volume

hi having trouble understanding why you would have LUNS inside NFS volume. My understanding is LUNS are used in block storage - iSCSI or FC. NFS however is "file" level. So if I was using a windows box (no hypervisor) without esx id use a LUN for iSCSI or Fchannel.

If I had VMware then I wouldnt need to use a LUN in storage I could get esx (abstraction layer) to I/O disk and use nfs  - no LUN

Im reading a book that talks about maximum LUNS per nfs volume. So when would i have LUNS inside nfs volume.? thanks
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Paul Solovyovsky

8/22/2022 - Mon
Paul Solovyovsky

You are correct.  The Datastores in VMware are connected either with block or file.  Block can be iSCSI/Fibre Channel/FCOE and file would be NFS.

Your premise is valid, you don't need LUNs to attach a NFS mount.
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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Ok thanks but why would my VMware book - Talk about max LUNS inside nfs volume? - It is a VMware publication.
Paul Solovyovsky

Check the errata on the book, it may be talking about max volumes or max VMs in a volume on a host.  What number is giving you?
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heading in text - NFS in vmware

best practices

use 100 to 400 vmdk files per NFS volume. The maximum possible "logical unit number " LUN is 256 for a maximum size of 64 TB per NFS volume

does this shed any light?
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

looks like an error to me!

max number of LUNs is 256, but a LUN is iSCSI or FC!
Paul Solovyovsky

I concur, check min/max document for max. # of NFS volumes.
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