24 x 2.5-inch front drive bays (16SAS/SATA+8AnyBay)
This section provides cable routing information for the server model with 24 x 2.5-inch front drive bays 
(16SAS/SATA+8AnyBay).
The server model is configured with two 8 x 2.5-inch SAS/SATA backplane (BP 1 and BP 2) and one 8 x 2.5- 
inch AnyBay backplanes (BP 3). Below lists all supported configurations with these three front drive 
backplanes.
Configuration
Rear BP
Storage controller
Qty. Type Qty. Type
Config. 1
2
CFF 16i RAID/HBA +CFF 36i RAID Expander
Config. 2
2
SFF 8i RAID/HBA +CFF 36i RAID Expander
Config. 3
3 SFF 8i RAID/HBA 
Config. 4
1 SFF 32i RAID 
Config. 5
1
Rear: 4 x 2.5'' 
SAS/SATA
2
CFF 16i RAID/HBA +CFF 36i RAID Expander
Config. 6
1
Rear: 4 x 2.5'' 
SAS/SATA
2
SFF 8i RAID/HBA +CFF 36i RAID Expander
Config. 7
1
Rear: 4 x 2.5'' 
SAS/SATA
3 SFF 8i RAID/HBA 
Config. 8
1
Rear: 4 x 2.5'' 
SAS/SATA
1 SFF 32i RAID 
Depending on your server configurations, refer to one of the following sections for cable routing information. 
• 
Configuration 1 to 4: front drive bays only
•  Configuration 5 to 8: front drive bays and rear drive bays
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ThinkSystem SR665 Setup Guide