Thursday, March 15, 2018

Incorrect Function When Bringing Disk Online in Disk Manager

I was configuring new storage for a Veeam Proxy server, and was surprised to find that I couldn’t bring the volume online. This was a freshly provisioned Fibre Channel LUN on a Nimble AF5000 array. The particular Veeam Proxy in question is a Cisco UCS B200 M3 blade. I created the LUN on the AF5000 and created the initiators. I then configured Fibre Channel zoning on the Nexus switches, went back to Windows and rescanned the storage. The new LUNs appeared in Disk Management, but when attempting to bring them online I received this message:

After some quick troubleshooting, I found that the SAN policy for the Virtual Disk Manager is set to “Offline Shared” by default. The SAN policy controls how SAN LUNs are mounted on a Windows Server. This can be confirmed using DiskPart.

Open a cmd prompt as admin and type in “diskpart”. Then type in “san”. This will show you the current SAN policy.

To resolve this, you need to change the SAN Policy to “Online All”. This can be done with a simple command. Back in the diskpart window, type in “san policy=onlineall” :

Now, go back to disk management (or you can just use diskpart) and bring the volume online, then initialize it.



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  3. Hello Kim, Great article! Now we need to give our inland valley kids the facts on how to do more then protest. Those that will be 18 in Nov need to protest with their vote! All of them can start now campaigning against these NRA stooges in our home districts. We’ll never get realistic gun reform laws until these men are voted out. Here’s our home districts; Dist 50-Congressman Duncan Hunter (Temecula,Escondido North County SD) Dist 42- Congressman Ken Calvert (Menifee/Murrieta/ Riverside) Dist 8- Congressman Paul Cook (San Bernardino) Dist 10 Congressman Jeff Dunham ( San Joaquin) Dist 39- Congressman Ed Royce ( Oc/San Bernardino & LA) Dist 48 Dana Rohrabacher (OC). Rep Rohrabacher is the largest recipient of NRA donations of these Reps. However, all of them have been voting in lock step with the NRA! Let’s arm our kids with the facts as well as the passion for change. Thank you again for covering this event. Please continue to cover the issue as it unfolds in our own So Cal districts. Sincerely, Cynthia Stemrich custom written essays


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