Chapter 3. IBM System x3850 X5 and x3950 X5 91
Figure 3-22 Front view of the x3850 X5 showing eight 2.5-inch SAS drives
3.9.2 SAS and SSD 2.5-inch disk support
This section describes backplane, controller, and drive options for 2.5-inch disk drives and
SSDs.
2.5-inch SAS disks and SSDs use the same backplane options. Most standard models of the
x3850 X5 include one SAS backplane, supporting four 2.5-inch drives, as listed in 3.3,
“Models” on page 64. You can add a second identical backplane to increase the supported
number of SAS disks to eight (using part number 59Y6135). The standard backplane is
always included in the lower of the two backplane bays.
“x3850 X5 backplane options” on page 91 lists the backplane option.
Table 3-20 x3850 X5 backplane options
The SAS backplane uses a short SAS cable (included with the part number 59Y6135), and it
is always controlled by the RAID adapter in the dedicated slot behind the disk cage, never
from an adapter in the PCIe slots. The required power/signal “Y” cable is also included with
the x3850 X5.
Up to two 2.5-inch backplanes (each holding up to four disks) can connect to a RAID
controller installed in the dedicated RAID slot. Table 3-21 lists the supported RAID controllers.
For more information about each RAID controller, see 3.9.4, “SAS and SSD controllers” on
page 96.
Table 3-21 RAID controllers that are compatible with SAS backplane and SAS disk drives
Part number Feature code Description
59Y6135 3873 IBM Hot Swap SAS Hard Disk Drive Backplane (one standard, one
optional); includes 250 mm SAS cable, supports four 2.5-inch
drives
Part number Feature code Description
44E8689 3577 ServeRAID BR10i (standard on most models; see 3.3, “Models” on
page 64)
46M0831 0095 ServeRAID M1015 SAS/SATA Controller
46M0829 0093 ServeRAID M5015 SAS/SATA Controller
a
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