Home › Forums › Products › Rackmount › the connection to dsp 4 was lost › Reply To: the connection to dsp 4 was lost December 13, 2025 at 11:07 am #193735 javartinParticipant I tried to put “usb-self-test.sqz” and “usb-self-test-info.xml” in a usb thumb drive and ran the test, however when the test finished, there’s no error log copied to the thumb drive…. Attachments:You must be logged in to view attached files.