Your SQL Server database files changed to a new SAN. Shutdown the old SQL Server and robocopy or xcopy the Old files to the new Disk. (Besure that you use the same drive letter as on the Old Disk) Besure you also copied the security of the old disk to the new disk.
xcopy "C:\Source Folder" "C:\Destination folder" /X /H /E
/X – Copies file audit settings and file ownership and ACL information.
/H – Copies hidden and system files.
/E – Copies directories and subdirectories, including empty ones.
robocopy H:\Microsoft SQL Server H:\Microsoft SQL Server /E /SEC
Be aware that you use the same drive letter on the new SAN.
You can also rename the old disk and rename the new disk to h:\
now you can copy the OlDDIKS:\Microsoft SQL Server to H:\Microsoft SQL Server