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M.2 drive and slot numbering

Use this information to locate the M.2 drive and slot numbering

M.2 boot adapter​

Figure 1. M.2 boot adapter
M.2 boot adapter
Important

The M.2 drives on opposite sides of the adapter must be of the same form factor (that is, the same physical length) because they share the same mounting clip.

Table 1. M.2 boot adapter slot numbering
1 Drive 02 Drive 1

M.2 data adapter​

Figure 2. M.2 data adapter
M.2 data adapter
Important

For the data drive adapter and the boot drive adapter, the pairs of M.2 drives on opposite sides of the adapter must be of the same form factor (that is, the same physical length) because they share the same mounting clip.

In this illustration of M.2 data adapter,

  • Drive positions 1 and 4 must be of the same form factor (that is, the same physical length)

  • Drive positions 2 and 3 must be of the same form factor (that is, the same physical length)

Table 2. M.2 data adapter
1 Drive 2 or 93 Drive 5 or 6
2 Drive 4 or 74 Drive 3 or 8

The following tables demonstrate the M.2 drive and slot numbering.

  • PCIe and M.2 riser assembly

    Left-wing (M.2 data adapter)Right-wing (PCIe adapter)
    The drive numbering on the adapterThe slot numbering in the UEFI Setup MenuThe drive numbering on the adapterThe slot numbering in the UEFI Setup Menu
    Drive 2Slot 2PCIe adapterSlot 6
    Drive 3Slot 3
    Drive 4Slot 4
    Drive 5Slot 5
    Left-wing (M.2 data adapter with hardware RAID)Right-wing (PCIe adapter)
    The drive numbering on the adapterThe slot numbering in the UEFI Setup MenuThe drive numbering on the adapterThe slot numbering in the UEFI Setup Menu
    Drive 2Slot 2/3PCIe adapterSlot 6
    Drive 3
    Drive 4Slot 4/5
    Drive 5

  • M.2 riser assembly with two M.2 data adapters

    Left-wing (M.2 data adapter)Right-wing (M.2 data adapter)
    The drive numbering on the adapterThe slot numbering in the UEFI Setup MenuThe drive numbering on the adapterThe slot numbering in the UEFI Setup Menu
    Drive 2Slot 2Drive 9Slot 9
    Drive 3Slot 3Drive 8Slot 8
    Drive 4Slot 4Drive 7Slot 7
    Drive 5Slot 5Drive 6Slot 6
    Left-wing (M.2 data adapter with hardware RAID)Right-wing (M.2 data adapter with hardware RAID)
    The drive numbering on the adapterThe slot numbering in the UEFI Setup MenuThe drive numbering on the adapterThe slot numbering in the UEFI Setup Menu
    Drive 2Slot 2/3Drive 9Slot 8/9
    Drive 3Drive 8
    Drive 4Slot 4/5Drive 7Slot 6/7
    Drive 5Drive 6