Lenovo Flex System x240 M5 Product Manual - Page 16
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The following figure shows the adapter, flash power module and backplane that are included in the option.
The included backplane replaces the standard backplane that came with the server. The backplane also
serves as the conduit to route the PCIe signals from the system board to the RAID controller.
Figure 5. ServeRAID M5215 SAS/SATA controller
Note: The ServeRAID M5215 installed in the x240 M5 only supports two 2.5-inch drives using the
supplied backplane. 1.8-inch drives are not supported.
The ServeRAID M5215 SAS/SATA controller has the following features:
Eight internal 12 Gbps SAS/SATA ports (also supports 6 Gbps)
PCI Express 3.0 x8 host interface
12 Gbps throughput per port
LSI SAS3108 12 Gbps RAID on Chip (ROC) controller
Onboard 2 GB data cache (DDR3 running at 1866 MHz)
Support for RAID levels 0 and 1
Standard flash power module (supercapacitor-based) provides the power capacity needed to off-load
the cache to flash in the event of a power failure
Support SAS and SATA HDDs and SSDs
Support for intermixing SAS and SATA HDDs and SSDs; mixing different types of drives in the same
array (drive group) is not recommended
Support for self-encrypting drives, SEDs (LSI MegaRAID SafeStore)
Optional support for SSD performance acceleration with MegaRAID FastPath
Support for up to 64 virtual disks, up to 128 arrays, and up to 16 virtual disks per array
Support for logical unit number (LUN) sizes up to 64 TB
Configurable stripe size 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
The Performance Accelerator upgrade (47C8710), implemented using the LSI MegaRAID FastPath
software, provides high-performance I/O acceleration for SSD-based virtual drives by using an extremely
low-latency I/O path to increase the maximum I/O per second (IOPS) capability of the controller. This
feature boosts the performance of applications with a highly random data storage access pattern, such as
transactional databases. Part number 47C8710 is a Feature on Demand license.
Lenovo Flex System x240 M5
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