GUID Partition Table (GPT) whitepaper

Install an OS into GPT Disk on Intel® HWR Array
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2. Reboot into EFI shell.
3. Type “drivers” to find out EFI SAS Driver number.
Figure 2 EFI command
Figure 3 EFI SAS Driver number
This SAS driver number is 137. The number 137 could be different, depending on the result
of the EFI SAS driver number checking.
4. Type “dh –d <SAS Driver number >” to find out SAS controller number
Figure 4 EFI SAS controller number
This SAS controller number is 136. The number 136 could be different, depending on result
of the EFI SAS controller number checking.
5. You can type “dh –d < SAS Controller number >” to look up information of the controller.