Can we map iSCSI lun to Linux VM? Pros and Cons to be taken care.
It's called a RDM when you do that. https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.storage.doc/GUID-9E206B41-4B2D-48F0-85A3-B8715D78E846.html
Pros/Cons... can depend why you want to do it.
migration is probably the only real "con" that stands out when I've worked with these in the past. Which isn't horrible, it's (usually) just a few extra steps.
Alternatively, you can map directly iSCSI to a VM. I've done it all the time in Windows VMs. Procedure is the same as a regular Linux iSCSI LUN.
You asked for pros and cons, what are you comparing to?
Why do you need it?
What are you using now?
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