I have a SAS HDD enclosure of HP server, which has a following connector:
What is the purpose of this connector? One purpose is to lit the LEDs in front of the enclosure . Is this the only reason for that connector?
It's an HP SmartDrive Carrier, available for Gen8 and newer HP ProLiant servers.
The purpose of the new carrier design was to add some intelligence and array configuration awareness to the disk drive. This also had the aim of reducing human error in the datacenter, as some technicians could pull the incorrect disk(s) during system maintenance and repairs.
The electrical contacts you see on the carrier are used to control the LEDs and communicate drive and array status.