Considering a 3U case that has a backplane for SAS/SATA that comes with 4x SFF-8643 connectors on it. 16 ports total. Going to use SAS drives that are 12gbps. Planning on connecting it to a raid card but for the life of me can't tell what kind of cables I need. Haven't figured out the raid card I'm going to use but so far every SFF-8643 cable seems to come with 4 SATA connectors on the other end. Image of the backplane is attached as even with a small image the forum complained the image was to large. Any thoughts on what kind of cable I need and what Raid card would work with this? If it matters looking at my future Ryzen 7000 build so supports PCIE 5.0 if that matters.
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if your raid card uses mini sas hd the same as the picture of the back plane you posted then you need 4 of these if you are going to run 16 hdd.
store.supermicro.com
Supermicro Internal MiniSAS HD 35cm Cable (CBL-SAST-0568)
Copper Cable Assembly Perfect for Internal MiniSAS HD SFF-8643 Applications Also Available in 25cm and 50cm Supermicro Certified