• [6.10-rc4] Single M.2 NVMe disappears out of sudden, shown with weird label in /dev/disk/by-id

    hawihoney

    By hawihoney

      • Minor

    On my Supermicro X12SCA-F motherboard I used two M.2 NVMe 1TB "Samsung 970 EVO Plus" disks since nearly a year. Both disks were single disk pools each. Today one of the disks disappeared. Even after a reboot only one disk came up. The missing disk is not offered on the Main page and is not shown in the System Devices list (Tools page). But I think that this disk is shown with weird values in /dev/disk/by-id:

      

    476 0 lrwxrwxrwx 1 root root   13 Mar 30 14:32 nvme-Samsung_SSD_970_EVO_Plus_1TB_S4EWNZFN818010Z -> ../../nvme0n1
479 0 lrwxrwxrwx 1 root root   15 Mar 30 14:32 nvme-Samsung_SSD_970_EVO_Plus_1TB_S4EWNZFN818010Z-part1 -> ../../nvme0n1p1
477 0 lrwxrwxrwx 1 root root   13 Mar 30 14:32 nvme-eui.0025385801adb6b8 -> ../../nvme0n1
480 0 lrwxrwxrwx 1 root root   15 Mar 30 14:32 nvme-eui.0025385801adb6b8-part1 -> ../../nvme0n1p1

     

    Any idea what these two additional lines mean. Is it all the same disk or are these two disks? And if these are two disks, how come that they share the same identifier? Any help is highly appreciated.

     

    Diagnostics attached.

     

    Thanks a lot.

     

    tower-diagnostics-20220330-1518.zip

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    Recommended Comments

    JorgeB

    Only one NVMe device is being detected by Linux, not sure what the other device is about, but it's the same one, you can see the serial number on the SMART report.

     

    Try power cycling the server or check if the other device is being detected in the BIOS.

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