open a command prompt and type “diskpart.exe”.You will now receive a diskpart-prompt:Diskpart>
Now type “san”. This will provide you with the current configured SAN policy:SAN Policy : Offline Shared
In the diskpart-prompt, type “san policy=OnlineAll”.This will result in the following message:Diskpart successfully changed the SAN policy for the current operating system.Now type “list disk”, which will give this message:Disk ### Status Size Free Dyn Gpt
Disk 0 Online 30 GB 0 B
Disk 1 Offline 50 GB 1024 KB
In my case, disk 1 was offline so I typed “select disk 1” which provided:Disk 1 is now the selected diskNow type “attributes disk clear readonly”.Disk attributes cleared successfully.And to check if all the settings are now correct, type “attributes disk”.This will give an output something like:Current Read-only State : No
Read-only : No
Boot Disk : No
Pagefile Disk : No
Hibernation File Disk : No
Crashdump Disk : No
Clustered Disk : No
After the last check has been successful, type “online disk” to bring the disk online.
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