Using The Serveraid C100 With 1.8-Inch Ssds; Hdds And Sdds - IBM NeXtScale System Planning And Implementation Manual

4.7.2 Using the ServeRAID C100 with 1.8-inch SSDs

The on-board ServeRAID C100 SATA controller provides four channels, two at
3 Gbps and two at 6 Gbps. When a single 3.5-inch SS SATA HSS or two 2.5-inch
SS SATA HDDs are installed, drives are connected at 6 Gbps, as shown in
Figure 4-9.
Figure 4-9 Transfer speeds for 1.8-inch drive bays
To maximize performance, when you are installing only two 1.8-inch drives,
install them in the top two drive bays.
When four 1.8-inch SS SATA SSD drives are installed, the two at the top of the
cage operate at 6 Gbps while the two at the bottom operate at 3 Gbps. An array
that features drives at different speeds performs at the lowest speed. For
example, a paired array between top drives operates at 6 Gbps; however, a
paired array between a top drive and a bottom drive operates at 3 Gbps.

4.7.3 HDDs and SDDs

Table 4-15 lists the HDD and SSD options that are available for the internal
storage of the nx360 M4 server.
Table 4-15 Disk drive options for internal disk storage
Part Feature Description
number code
3.5-inch Simple-Swap SATA HDDs
00AD025 A4GC IBM 4TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System
00AD020 A489 IBM 3TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System
00AD015 A488 IBM 2TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System
00AD010 A487 IBM 1TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System
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