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- Description
- Specifications
The Cisco 12G SAS Modular RAID controller is the internal storage controller for the UCS C240 M4 rack server, in the Cisco misc range, and it manages up to 24 internal SAS hard drives and SAS or SATA solid-state drives.
The server reserves a dedicated internal slot for it, and the controller is installed at the factory when selected. It works with every backplane version of that server: the 8-drive, 16-drive and 24-drive layouts.
Without a flash-backed write cache upgrade the controller has no onboard cache and runs JBOD, RAID 0, RAID 1 and RAID 10, with a fixed 64 KB stripe size. RAID 5 and RAID 6 need a flash-backed write cache module, which comes in 1 GB, 2 GB and 4 GB sizes.
With one of those cache modules fitted, RAID 50 and RAID 60 become available alongside JBOD, 0, 1, 10, 5 and 6, and stripe sizes from 8 KB up to 1024 KB can be chosen. Each cache module carries a SuperCap that protects the write cache during power loss.
Self-encrypting drives work only when the controller is paired with one of the cache modules, and their keys are managed through the standalone CIMC interface. UCS Manager does not manage those keys.
| Part number | UCSC-MRAID12G |
| Controller | Cisco 12G SAS Modular RAID controller |
| Drive interface | 12 Gbps SAS, SAS/SATA SSD |
| Internal drives | up to 24 |
| Backplanes | 8-drive, 16-drive and 24-drive |
| RAID without cache module | JBOD, 0, 1, 10 |
| RAID with cache module | JBOD, 0, 1, 10, 5, 6, 50, 60 |
| Stripe size | 64 KB without cache module; 8 KB to 1024 KB with cache module |
| Cache module sizes | 1 GB, 2 GB, 4 GB |
| SED key management | standalone CIMC only |
| Host server | UCS C240 M4 |