84 IBM NeXtScale System Planning and Implementation Guide
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
number
Feature
code
Description Maximum
supported
3.5-inch Simple-Swap SATA HDDs
00AD025 A4GC IBM 4TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System 1 / 8
a
00AD020 A489 IBM 3TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System 1 / 8
a
00AD015 A488 IBM 2TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System 1 / 8
a
00AD010 A487 IBM 1TB 7.2K 6Gbps SATA 3.5" HDD for NeXtScale System 1 / 8
a
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