Solving performance issues with ESXi 6 (Gen8)

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Solving performance issues with ESXi 6 (Gen8)

If you have installed to a newer version of ESXi on your Gen8 Micro Server and are now suffering from very low performance disk speed, try the following steps to downgrade to a former hpvsa-driver (scsi-hpvsa-5.5.0-88).

Just follow these simple steps:

  1. Download the driver and unpack the archive named
  2. Stop all VMs that are currently running on your machine.
  3. Enable SSH connections to your server in the GUI
  4. Copy „scsi-hpvsa-5.5.0-88OEM.550.0.0.1331820.x86_64.vib“ to the /tmp directory (just use WinSCP for that) – In my case, this file is 699 KB.
  5. Start a Session to your server (using Putty)
  6. change directory to /tmp
  7. Copy the vib file to /var/log/vmware
  8. Start the „Maintenance mode“
  9. Deinstall the running scsi-hpvsa driver
  10. Install scsi-hpvsa-5.5.0-88
  11. Restart your ESXi, stop the maintenance mode, disable SSH connections and start VMs again

Hope that helps for you as well.


  1. Alex 28. November 2015 at 18:25 - Reply


    Thanks for the info, I just did this process for a ESXi 5.5 update 2 March 15 on a ProLiant MicroServer Gen8 and it didn’t work unfortunately, I still get Lost access to volume 5654ffd3-a6404e75-57ae-a01d48c77d34 () due to connectivity issues. Recovery attempt is in progress and outcome will be reported shortly.
    Successfully restored access to volume 5654ffd3-a6404e75-57ae-a01d48c77d34 () following connectivity issues.
    every minute 🙁

  2. DrNavratil 20. Juli 2016 at 10:01 - Reply

    This also did not work for me. Get this message when powering up my ESXI host.

  3. Frank 15. November 2016 at 21:11 - Reply

    Doesn’t work either for me. The command to remove the scsi drivers doesn’t do anything.

  4. Johan Draaisma 26. Mai 2017 at 21:50 - Reply

    Worked perfectly on ESXi 6.5 with ProLiant ML350e G8 v2 and ProLiant MicroServer Gen8. Stupid HP drivers. Thanks man.

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