IBM ServeRAID M5552 LSI SAS3108 2x SFF-8644 extern 12G SAS PCIe x8 Controller Raid: 0, 1, 5, 6*, 10, 50, 60* 00AE939 with 2GB cache

Lenovo ServeRAID M5225-2GB SAS/SATA Controller has the following specifications:

- LSI SAS3108 12 Gbps RAID on Chip (ROC) controller with the 1.2 GHz dual-core processor
- PCI Low Profile, Half-length - MD2 form factor
- Eight external 12 Gbps SAS/SATA ports (support for 12, 6, or 3 Gbps SAS speeds and 6 or 3 Gbps SATA speeds). Up to 12 Gbps throughput per port
- Two external x4 mini-SAS HD connectors (SFF-8644)
- PCI Express 3.0 x8 host interface
- Support for RAID levels 0, 1, 10, 5, and 50 standard; support for RAID 6, 60 with the extra upgrade 47C8706
- 2 GB of onboard data cache (DDR3 that is running at 1866 MHz) with flash backup (MegaRAID flash cache protection technology)
- Supports SAS and SATA HDDs and SSDs
- Intermix of SAS and SATA HDDs and SSDs is supported, but the mixing of different drives type in the same array (drive group) is not recommended
- Intermixing of 12 Gbps and 6 Gbps drives is supported
- Supports connections to external drive enclosures
- Supports up to 240 devices
- Support for self-encrypting drives (SEDs) with MegaRAID SafeStore as a standard feature
- Optional support for SSD performance acceleration with MegaRAID FastPath and SSD caching with MegaRAID CacheCade Pro 2.0 47C8712
- Support for up to 64 virtual disks, up to 128 arrays, up to 16 virtual disks per array, and up to 32 physical drives per array
- Support for logical drive sizes greater than 2 TB
- Configurable stripe size from 64 KB up to 1 MB
- Compliant with Disk Data Format (DDF) configuration on disk (COD)
- S.M.A.R.T. support
- MegaRAID Storage Manager management software