Dell Compellent Controllers
A Compellent controller is matched by system or enclosure model first and interface second. Compellent controllers come in two kinds: storage controllers for SC Series systems such as the SC4020, SCv2000, SC7020 and SC8000, and the enclosure management modules (EMMs) that run SC100/SC120, SC200/SC220, SC280, SC400/SC420 and SC460 expansion enclosures. Match a storage controller by its front-end ports, Fibre Channel or iSCSI, and its cache, and an EMM by its 6Gb or 12Gb SAS speed. Before any Compellent controller ships, it has passed both our receiving test and our pre-shipment test.
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Dell RYG5C Compellent SC280 6Gbps SAS ControllerAvailability: In StockManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$63.99 - Dell JMNK7-CML Compellent SC400 SC420 12Gbps SAS ControllerAvailability: In StockManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$269.99
- Dell 0TW47 Compellent SC200 SC220 6Gbps SAS ControllerAvailability: In StockManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$14.99
- Dell H7T18 CML SC4020 Type A Quad Port 8GB Fibre Channel 16GB Cache ControllerAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell 2X93X-CML Compellent SC400 SC420 12Gbps SAS ControllerAvailability: In StockManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$289.99
- Dell 1JND1 Compellent SC100 SC120 6Gbps SAS ControllerAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell YRWF7 Compellent SC280 SAS 6Gbps ControllerAvailability: Only 9 leftManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$63.99
- Dell 6HJ58 Compellent SC7020 128GB Cache Controller EnclosureAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell M24G7 Compellent SC7020 128GB Cache Controller EnclosureAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell X7HPF Compellent SCv2000 Type B Quad Port 8GB FC 8GB Cache ControllerAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell 5Y2X4 CML SCv2000 Type B Dual Port 10GBASE-T iSCSI 8GB Cache ControllerAvailability: Available by QuoteManufacturer: Dell Condition: Refurbished 1 Year WarrantyRequest PricingOut of stock
- Dell HXDMY Compellent SC460 SAS 12Gbps ControllerAvailability: Only 3 leftManufacturer: Dell Condition: Refurbished 1 Year WarrantyBuy Now$498.99
Compellent controllers by system and enclosure
Dell's owner's manuals set the match: a storage controller carries the front-end host ports and back-end SAS ports of its system, while the EMMs in an expansion enclosure provide the SAS data path back to those controllers.
| Controller | Fits | Interface (Dell owner's manual) |
|---|---|---|
| SC4020 storage controller | SC4020 | Front end per controller: four 8Gb FC, two 16Gb FC, two 10Gb iSCSI or four 12Gb SAS ports |
| SCv2000 storage controller | SCv2000 and SCv2020 | Front end: four 8Gb or two 16Gb FC, two 10Gb or four 1Gb iSCSI; back end: two 6Gb SAS ports |
| SC7020 storage controller | SC7020 | Mezzanine card with four SFP+ or four 10GBASE-T iSCSI ports, slots for FC, iSCSI and SAS I/O cards, two 12Gb SAS back-end ports |
| SC8000 storage controller | SC8000 | Up to six enclosure chains per controller (Dell SC280 guide) |
| SC100/SC120 EMM | SC100 and SC120, which expand the SCv2000/SCv2020 | 6Gb SAS drives |
| SC200/SC220 EMM | SC200 and SC220, which expand the SC4020 | 6Gb SAS |
| SC280 EMM | SC280, 84 3.5-inch drives | 6Gb SAS I/O module |
| SC400/SC420 EMM | SC400 and SC420, which expand the SC5020 and SC7020 | 12Gb SAS drives, four mini-SAS HD connectors |
| SC460 EMM | SC460, 60 3.5-inch drives | 12Gb SAS drives |
Expansion follows the storage system. Dell's SC4020 manual allows SC200/SC220 enclosures or up to two SC280s on one system but not both at once, the SCv2000 grows with SC100/SC120 enclosures, and the SC5020 and SC7020 take SC400, SC420 and SC460 enclosures, the SC7020 also accepting SC280s. Drives for the same systems are on Compellent Hard Drives and Compellent SSDs, front-end and back-end cards on Compellent HBAs, and complete systems on Dell Compellent arrays.
Two controllers, one mirrored write cache
Dell builds SC Series systems around a pair of storage controllers. Its SC5020 and SC7020 manuals state that write cache is mirrored between the two controllers and that a battery backup unit in each one keeps it powered long enough to save the write cache to an internal SSD during a power failure. The SC9000 manual adds that shutting one controller down fails the Storage Center over to the other, which carries on processing I/O, so a spare controller restores that redundancy.
