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5288 V3 Server V100R003 User Guide 26

This document describes the features, appearance, and technical specifications of the 5288 V3 server, and how to install, power on, and power off the 5288 V3 server, connect cables, and install an operating system (OS) for it.
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Querying the Mapping Between NVMe PCIe SSD Drive Letters, Slot IDs, and Bus IDs in Linux

Querying the Mapping Between NVMe PCIe SSD Drive Letters, Slot IDs, and Bus IDs in Linux

Query the mapping between NVMe PCIe SSD drive letters, slot IDs, and bus IDs in Linux before removing NVMe PCIe SSDs.

Procedure

  1. Open the command terminal on the OS.
  2. Query the slots IDs of the NVMe PCIe SSDs.

    Run the following commands:

    cd /sys/bus/pci/slots

    ll

    Information similar to Figure 9-31 is displayed.

    Figure 9-31 Slot IDs

  3. Query the bus IDs based on the slots IDs.

    Run the following command to query the bus ID of a NVMe PCIe SSD:

    cat /sys/bus/pci/slots/$slot/address

    In the command, $slot indicates the slot ID, which is obtained in Figure 9-31.

    Figure 9-32 Bus IDs that map to slot IDs

    As shown in Figure 9-32, the bus ID of the NVMe PCIe SSD in slot 8 is 0000:81:00.

  4. Query information about the NVMe PCIe SSD drive letters.

    For example, to query information about the NVMe PCIe SSDs in /sys/class/block/, run the following command:

    ls -l /sys/class/block/

    Information similar to Figure 9-32 is displayed.

    Figure 9-33 Mapping between NVMe PCIe SSD drive letters, PCIe bus IDs, and 80 IDs

  5. Obtain the mapping between slot IDs and SSD drive letters based on the mapping between the slot IDs and bus IDs.

    For example, as shown in Figure 9-33, drive letter nvme0n1 maps to bus ID 0000:81:00.0.

    According to the information obtained in Figure 9-32, bus ID 0000:81:00 maps to slot ID 8.

    Therefore, drive letter nvme0n1 maps to slot ID 8.

    NOTE:

    The slot IDs queried in 2 should be consistent with the slot IDs (4 to 7) marked on the server. If they are not, get them from the 80 IDs obtained in 4. For example, "02.0" in 80 ID 0000:80:02.0 indicates the slot number.

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Updated: 2018-11-26

Document ID: EDOC1000080031

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