Hello huud,

Here is a link to Dell EMC UnityVSA A Detailed Review which explains about UnityVSA & how it is used.

https://dell.to/3wEi5Y2

Hi @DELL-Sam L 

Thanks for the document, sorry for the late reply, I never received any notification of your reply.

Am I the only one unable to login into the UnityVSA license page here https://www.dellemc.com/en-us/auth/elmeval.htm

This address worked for me https://www.delltechnologies.com/en-us/auth/elmeval.htm

OK so I ran into a strange issue.

I had shutdown all systems, vCenter, ESXi hosts, and UnityVSA, on reboot the ESXi hosts had no connection to the data store, this has happened the second time. I thought since the UnityVSA takes a long time to boot up thats the reason, but not, even after completely booting up, the disks just disappear from vCenter and ESXi hosts. This only happens if vCenter and ESXi hosts are booted before UnityVSA is completely booted up, this is not normal as even if the ESXi hosts boots up quicker, once the UNityVSA boots up the disks should show back in vCenter but it doesnt.

https://i.ibb.co/BTfz0H6/W-SRV-ADDC-01-2021-06-12-21-18-00.png - Storage pool
https://i.ibb.co/GxwXMj7/W-SRV-ADDC-01-2021-06-12-21-18-07.png - Initiators
https://i.ibb.co/ChqCcbV/W-SRV-ADDC-01-2021-06-12-21-18-13.png - Initiators Path
https://i.ibb.co/s3hXjvj/W-SRV-ADDC-01-2021-06-12-21-18-20.png - vCenter in UnityVSA
https://i.ibb.co/Fqt51pm/W-SRV-ADDC-01-2021-06-12-21-18-26.png - ESXi Hosts in UnityVSA
https://i.ibb.co/pf82LR1/W-SRV-ADDC-01-2021-06-12-21-18-37.png - ESXi Host in vCenter
https://i.ibb.co/6D7KFQD/W-SRV-ADDC-01-2021-06-12-21-18-51.png - Missing storage in ESXi Host
https://i.ibb.co/FxSBTcx/W-SRV-ADDC-01-2021-06-12-21-19-07.png - Storage Path in vCenter
https://i.ibb.co/2y9rmmH/W-SRV-ADDC-01-2021-06-12-21-22-47.png - Dynamic Discovery in ESXi Host
https://i.ibb.co/XjfgFm1/W-SRV-ADDC-01-2021-06-12-21-22-50.png - Path in vCenter

It's always better to have the storage side booted up before the hosts, especially if there are any boot Luns in that storage.

I'd recommend to check the hosts initiators status at Unity side if the are registered or not.

Also try to rescan from ESXi side and see if this resolves the issue

Thanks Mohammed,

That sounds reasonable to boot storage before hosts, this was how it works fine.