IBM X3850 X6, Product Manual

Page: 18 / 51

IBM System x3850 X6 18
The following rules apply when building a server configuration with eXFlash DIMMs:
The 200 GB and 400 GB eXFlash DIMMs cannot be mixed.

RAID 1 mirroring is provided by the eXFlash DIMM device driver.

Performance memory mode must be selected. RAS (lockstep) memory mode is not supported.

Only RDIMMs are supported by eXFlash DIMMs; LRDIMMs are not supported

The maximum quantities of eXFlash DIMMs are as follows:

One processor: 8 eXFlash DIMMs o
Two processors: 16 eXFlash DIMMs
o
Four processors: 32 eXFlash DIMMs
o
Internal storage
The server supports 1.8-inch solid-state drives in the IBM eXFlash SSD units and 2.5-inch SSDs and
HDDs. Drives are installed in the Storage Book. The x3850 X6 has one Storage Book. The Storage Book
supports the following configurations:
4x 2.5-inch hot-swap drive bays

8x 2.5-inch hot-swap drive bays

4x 2.5-inch hot-swap drive bays + 8x 1.8-inch hot-swap SSD bays

8x 1.8-inch hot-swap SSD bays

16x 1.8-inch hot-swap SSD bays

The following figure shows these configurations.
Figure 6. Internal drive configurations