Port Multiplier issues - JBOD device

  • I bought a used Mediasonic Probox 4 bay HDD Enclosure.

    My OMV is running on a Dell Optiplex 980 SFF which has an onboard eSATA port.

    I hooked up the Probox with a proper eSATA cable to the PC.

    I was able to see the 3TB Seagate HDD on the Boot menu, which means the port replicator is getting properly recognized by the motherboard and thus the HDD.


    Now when Debian boots up, I got error messages "PMP product ID mismatch". Here is my journalctl snippet.



    I also ran sudo rescan-scsi-bus with same result. Is this a compatibility issue or I need to update some settings somewhere?


    OMV Version: 5.4.7-1 (Usul)

    Processor: Intel Core i7 CPU 860 @ 2.8GHz

    Kernel; Linux 5.5.0-0.bpo.2-amd64

  • If you search for this error Port Multiplier vendor mismatch '0x197b' != '0x0' you get a number of hits albeit old ones, but they point to kernel modules. So what might be worth testing is different kernels from omv-extras and booting with that kernel, if the kernel change doesn't work then is there a firmware update for the enclosure and have you tested with USB 3. Whilst this will be the bottleneck if there are 4 drives in use at least it will confirm if the box is working as it should

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