Connect SC280 EnclosuresDell Compellent 75Connect SC280 EnclosuresThis section shows common cabling between the SC8000 controller and SC280 SASenclosures. Locate the scenario that most closely matches the Storage Center you areconfiguring and follow the instructions, modifying them as necessary.A cabling chain for the SC280 can contain up to two enclosures of 84 SAS drives each (168drives total). Each chain must contain the same type of enclosures, such as all SC280. Donot mix enclosure types in a chain.Each SAS IO card supports up to two chains of enclosures. All enclosures attached to thesame SAS IO card must be running at 6 Gb.SC280 enclosure chains are cabled as follows. Side A: Enclosures are connected from B port to A port, using the left EMMs. Side B: Enclosures are connected from A port to B port, using the right EMMs.Chain 1: B Side 1 Controller A: slot 5, port 3 → Enclosure 4: bottom EMM, port B.2 Starting with Enclosure 4, daisy‐chain the B side of Chain 1 by cabling: bottomEMM, port A → next enclosure up: bottom EMM, port B.3 Finish with Enclosure 1: bottom EMM, port A → Controller B: slot 5, port 1.Chain 2: A Side 1 Controller A: slot 6, port 3 → Enclosure 5: top EMM, port A.2 Starting with Enclosure 5, daisy‐chain the A side of Chain 2 by cabling: topEMM, port B → next enclosure down: top EMM, port A.3 Finish with Enclosure 8: top, port B → Controller B: slot 6, port 1.Chain 2: B Side 1 Controller A: slot 5, port 1 → Enclosure 8: bottom EMM, port B.2 Starting with Enclosure 8, daisy‐chain the B side of Chain 2 by cabling: bottomEMM, port A → next enclosure up: bottom EMM, port B.3 Finish with Enclosure 5: bottom, port A → Controller B: slot 5, port 3.Path ConnectionsPath High-Level StepsChain 1: Side A 1 Connect controller port 1 to the first enclosure, l eft EMM, port C.2 Connect the remaining enclosures in series from B port to A port using the l eftEMM s.3 If the Storage Center has dual controllers, connect the last enclosure, l eftEMM , port C to the second controller, port 3.Chain 1: Side B 1 Connect controller port 3 to the last enclosure, right EMM, port C.2 Connect the remaining enclosures in series from B port to A port using the rightEMM.3 If the Storage Center has dual controllers, connect the top enclosure, rightEMM, port C to the second controller, port 1.Note: The cabling illustrations in this chapter refer to enclosures as Enclosure 1,Enclosure 2, and so on. The numbers shown in the illustrations may not match theIndex number assigned by the System Manager. Storage Center assigns an Indexonly after the system is powered up and at least one drive is assigned to a DiskFolder.
