RAW drive problem caused by incompatibility of LUN ID

Dear all,

I have a 9 ESX4 host environment is not created at the same time. on the first time, we created 5 ESX hosts and then 2 then 2

I have virtual machines that have RAW disks. If this machine is on 1 five hosts I vMotion is on one of the other 4 of these hosts.

After investigating it, I found that the same LUN have different ID LUN. let say I LUN 5, this unit logic on the 5 number 1 hosts a LUN iD = 5, 6 and 7 = 7, host, 8 host LUN iD and LUN iD = 6 9A.

I also noticed that this same LUN on the five 1 hosts does not appear if I rescan for new data store while I see on the other 4 hosts and I can added too.

is it possible that I can rearrange the ID LUN LUN take the same LUN ID on all ESX hosts.

BR

This has happened in our environment several months ago, when we added new guest VM servers.

The fix was faily easy but a little of your time.

We determined which host had incorrect identifiers (new).  We then migrated virtual machines off and not assigned all the storage (RAW and data stores) of this host server.

Then, we added every record store and data to the sever host using the same order on the affected host.

We had a few shortcomings due to deletions of disk on servers not affected host like no SCSI_ID 15.  The new VM host wanted to use this ID when the record was posted to back the host.  So we created a temporary drive that has been subsequently deleted as a placeholder.

Once all the record shops and the data have been assigned with the correct ID our migration issues have been resolved.

There is probably an easier way to solve the problem of the San, but it was late and we could not get approval for a failure.

I hope this helps.

Tags: VMware

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