Product guide

IBM Flex System x440 Compute Node 15
The ServeRAID M5115 hardware kits are as follows:
ServeRAID M5100 Series Enablement Kit for IBM Flex System x440 (46C9030) enables support

for up to two 2.5-inch HDDs or SSDs in the hot-swap bays in the front of the server. It includes a
CacheVault unit, which enables MegaRAID CacheVault flash cache protection. This enablement kit
replaces the two standard 1-bay backplanes (which are attached through the planar to an onboard
controller) with new 1-bay backplanes that attach to an included flex cable to the M5115 controller. It
also includes an air baffle, which also serves as an attachment for the CacheVault unit.
MegaRAID CacheVault flash cache protection uses NAND flash memory powered by a
supercapacitor to protect data stored in the controller cache. This module eliminates the need for a
lithium-ion battery commonly used to protect DRAM cache memory on PCI RAID controllers. To avoid
the possibility of data loss or corruption during a power or server failure, CacheVault technology
transfers the contents of the DRAM cache to NAND flash memory using power from the
supercapacitor. After the power is restored to the RAID controller, the saved data is transferred from
the NAND flash memory back to the DRAM cache, which can then be flushed to disk.
Tip: The Enablement Kit is only required if 2.5-inch drives are to be used. If you plan to install four or
eight 1.8-inch SSDs only, then this kit is not required.
ServeRAID M5100 Series IBM Flex System Flash Kit for x440 (46C9031) enables support for up

to four 1.8-inch SSDs. This kit replaces the two standard 1-bay backplanes with a two 2-bay
backplanes that attach to an included flex cable to the M5115 controller. Because only SSDs are
supported, a CacheVault unit is not required, and therefore this kit does not have a supercapacitor.
ServeRAID M5100 Series SSD Expansion Kit for IBM Flex System x440 (46C9032) enables

support for up to four internal 1.8-inch SSDs. This kit includes two air baffles which can attach two
1.8-inch SSD attachment locations and flex cables for attachment to up to four 1.8-inch SSDs.
Note: The above kits are specific for the x440 and cannot be used with the x240 or x220.
The following table shows the kits required for each combination of drives. For example, if you plan to
install eight 1.8-inch SSDs, then you need the M5115 controller, the Flash Kit, and the SSD Expansion kit.
Table 8. ServeRAID M5115 hardware kits
Desired drive support Components required
Maximum
number of
2.5-inch
drives
Maximum
number of
1.8-inch
SSDs
ServeRAID
M5115
90Y4390
Enablement Kit
46C9030
Flash Kit
46C9031
SSD
Expansion Kit
46C9032
2 0 => Required Required
0 4 (front) => Required Required
2 4 (internal) => Required Required Required
0 8 (both) => Required Required Required