After managed to move quorum and DTC storage to different LUN, there is also the need to move database files around coz we need to do a SAN reconfiguration.
The highly summarized steps are as following:
> create new LUNs, present them to cluster nodes;
> initialize new disk, don't partition them yet, use diskpart to create partiton with an offset to make sure the partition is aligned.
> format new drives, assign drive letter, take SQL instance offline (leave the disk resource online), use xcopy to copy database files to the new drive.
>remove drive letter from the old drive, assign it to the new drive;
>using cluster administration tool, re-create the disk resource, modify resource dependency...
>failover and test etc.
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