All standard models ship with four 2.5-inch SAS/SATA hot-swap hard disk drive bays, except model 6241-
A4x. The following table shows the internal storage expansion options that are available.
Table 10. Internal storage expansion options
Part
number
Feature
code
Description Maximum
supported
44X4104 A4A6 4x 2.5" HS 12Gb SAS HDD Backplane 2
44X4106* A4A7 8x 1.8" HS 12Gb SAS HDD Backplane 2
44X4108 A4A8 1x4 2.5-inch NVMe PCIe Gen3 SSD Backplane 1
* Withdrawn from marketing
The backplanes are connected to one or two RAID controllers or HBAs depending on the number and type
of backplane that is installed. The adapters are installed in PCIe slots in the Storage Book, as shown in the
following figure.
Figure 6. Storage Book
The following table shows the backplanes that are required per Storage Book and the number of
controllers that are required. Note that the table shows the exact number of controllers supported for each
drive/backplane configuration, no more, no fewer.
Table 11. Drive combinations per Storage Book
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