Why only LUN 0

[Calvin]

Hello all experts, I'm new to Freenas. I just setup freenas 9.1 and created 2 iscsi targets which my ESXi 5.1u1 can see the 2 disks. However, why the 2 disks are all LUN 0? I'd like one LUN per disk and don't what to share the same LUN between 2 disks.

My 2 iscsi targets already have different serial number, but with the same Portal group and Initiator group. Do I need to create separate portal and initiator for each target as well?

 

[dlavigne]

This is intentional. It is a performance loss to have multiple LUNs on a target in iSCSI as they share the same TCP connection and compete for resources, reducing overall throughput if there is traffic on more than one LUN at a time.

Targets can share portal and initiator groups. Select the initiator group number via the dropdown in the Target configuration dialog.

 

[Calvin]

Thanks for dlavigne's reply. Will multiple targets per LUN also suffer performance loss? How can I setup different LUN for different target then?

 

[dlavigne]

Just a follow-up that 9.2.1.6 will allow you to specify the LUN ID: http://doc.freenas.org/index.php/9.2.1.6_ERRATA#Section_8.7.7_Target.2FExtents.