EMC Unity Maximum Initiator Paths

Question

Hi all, We have EMC Unity 500,600 and 450F in our environment. There is an issue about initiator paths limit! The one of Unity 500 devices is using for virtualization, when initiator paths reached to 2048, new initiator can not be logged on to array. Of course, EMC used 'Max Initiator Per Array' and not initiator paths in documents. The limit is 2048 for Unity 500 and 4096 for Unity 600. But we have also same problem on EMC Unity 600, when initiator paths reached to 2048, new initiator can not be logged on to array! About physical connectivity, each ESXi host has 4 HBA. We have fabric with Brocade SAN switches that the SAN switches are connected via ISL to each other. We had to keep down one of HBA adapter on each server to have more online servers. Can anyone explain the limit on EMC Unity? Why situation is same on both EMC Unity 500 and 600?

DELL-Josh Cr · Answer

Hi Davood,

Is everything on the latest version?

Some steps to try

Identify the unused initiators (registered but not logged in).
Unregister these initiators.
Reduce the number of paths if possible to the storage groups.

Try to add more LUNs

Davood Teymoori · Answer

Hi, Thanks for reply. Everything is on the latest version. Why same situation is occurred on EMC Unity 500 and 600? Where is storage group in EMC Unisphere for EMC Unity?

DELL-Josh Cr · Answer

I have not been able to find anything about why they are the same limit, your best option is to call phone support.

grsoo · Answer

Hello, is any path initiators limit for Dell EMC UnityVSA community edition ? I found Unity VSA max initiator path is 512 but not information about limitations in community edition.

https://elabnavigator.emc.com/vault/pdf/EMC_Unity_ESSM.pdf?key=1546237104838

DELL-Sam L · Answer

Hello grsoo, It is the same for Unityvsa cloud edition.

Unity

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