Ibm Exflash Memory-Channel Storage - IBM X3850 X6 Product Manual

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If memory mirroring is used, DIMMs must be installed in pairs for Performance mode (minimum of one

pair per each processor) and quads for RAS mode. DIMMs in the pair/quad must be identical in type and

size.

If memory rank sparing is used, then a minimum of two single-rank or dual-rank DIMMs must be installed

per populated channel (the DIMMs do not need being identical). In rank sparing mode, one rank of a

DIMM in each populated channel is reserved as spare memory. The size of a rank varies depending on

the DIMMs that are installed.

IBM eXFlash memory-channel storage

IBM eXFlash memory-channel storage are storage offerings in the physical form of memory DIMMs.

These IBM eXFlash DIMMs are installed in memory DIMM sockets but appear to the operating system

and applications as block storage devices. This new and innovative technology brings storage electrically

closer to the processor subsystem, therefore improving performance considerably.

The following table shows the supported eXFlash DIMMs.

Table 6. Internal storage expansion options

Part

Feature

Name and description

number

code

00FE000 A4GX

IBM eXFlash 200GB DDR3 Storage DIMM

00FE005 A4GY

IBM eXFlash 400GB DDR3 Storage DIMM

The following figure shows one eXFlash DIMM installed with RDIMMs in the Compute Book.

Figure 5. IBM eXFlash DIMM installed in the Compute Book

IBM System x3850 X6

Maximum

supported

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