HPE ProLiant DL385 Gen11 Maintenance And Service Manual page 296

Rear: 2 SFF drive bay numbering Rear: 2 SFF drive bay numbering
LFF drive bay numbering LFF drive bay numbering
The following drive backplane options are supported in LFF drive configurations:
4 LFF 12G x1 SAS / SATA UBM2 LP
4 LFF 12G x1 SAS / SATA UBM6 LP
For more information on the drive backplane description, see Drive backplane naming.
Front: 12 LFF drive bay numbering Front: 12 LFF drive bay numbering
Midplane: 4 LFF drive bay numbering Midplane: 4 LFF drive bay numbering
Rear: 4 LFF drive bay numbering Rear: 4 LFF drive bay numbering
HPE ProLiant DL385 Gen11 Server Maintenance and Service Guide 296