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Serial Cables 24-bay 12Gbps SAS Enterprise JBOD Enclosure Review

By: Paul Alcorn | RAID/HBA in IT/Datacenter | Posted: Feb 20, 2015 3:10 pm
TweakTown Rating: 91%Manufacturer: Serial Cables

SA-ENC12G-024A Internals




The JBOD comes in a rack-mountable 19" 2U chassis with a solid construction. There are 24 ports for storage devices, and fan and power-fail notification lights near the right handle. A reset alarm button silences the alarm.




The rear of the chassis reveals 12 SFF-8644 HD MiniSAS receptacles. Each dual set of connectors attaches to four drives, and there is the option to connect the second cable to enable dual-port functionality. Two large 12V fans provide copious airflow to the chassis, and we can see the dual PSU arrangement.




The 48-pin 500W PSUs are hot swappable, and each has its own AC inlet. The chassis alarm sounds if power is lost to either PSU, or if the chassis fans fail.




The drives are plugged into six separate backplanes that are routed to the rear of the chassis. Each backplane has two connections routed directly to the rear of the unit. Power is served from a small PCB at the base of the chassis, and two connectors supply each backplane with power.




The Dual HD MiniSAS Receptacle (SFF-8644) to Dual Int MD MiniSAS Plug (SFF-8643) adaptors are present along the rear of the chassis. These convert the internal receptacles to external. These connectors can be purchased separately from Serial Cables, and we have used them extensively to convert internal RAID controller connections to external cabling.




Drive sleds are an often-overlooked component that can have a long-term impact. One of the impressive aspects of the eight-bay JBOD was the smooth drive sled operation, and this held true for the 24-port model as well. Many enclosures are not well aligned with internal backplanes. This creates friction when installing drives, and the friction sometimes requires a bit of force to overcome. The design of the Serial Cables drive sleds provides plenty of airflow through the front of the sled; they are also aligned perfectly, and provide reliable and smooth operation. We tested several types of SSDs and HDDs with the enclosure, and we were impressed with the smooth operation.

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