Chenbro RM418 Series 6Gb/s 24-port 2.5 Expander Backplane(80H10341802A0, 80H10341803A0, 80H17341801A0), For 24-bay 2.5 Hot-swap HDD Cage - Manual - Manual (Page 6)

Features
General
• To expand one Mini-SAS port (SFF-8087) to 24 x SATAII/SAS 2.5” HDD
• Support HDD Failure / Activity Indication and HDD ID Mapping
• Support RM235/RM418/RM417 only
High
-
Speed I/O
• 6.0 Gb/s or 3.0 Gb/s operations
• Automatic negotiation of linking speed
Application
• SAS / SATA HDD NAS storage sever or enclosure
• Security system
• Video streaming / editing workstation
SAS expander Backplane must be used only with SAS RAID card
The supported HDD quantity is depended on the capability of the
SAS RAID card in the system.