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I have a LSI20320IE controller ( here are the Specifications ) in an PCI-express slot and a LTO3 Ultrium HP TAPEDRIVE under Ubuntu 20.04 LTS on a DELL OPTIPLEX 9020 MT ( Manual ). I have a 4 meters VHDCI(Male)-HD68(male) cable to connect each other.

I can not see the Drive by running the command lsscsi. But when I use a SCSI controller Adaptec 19160 (in a PCI slot) with a short 1 Meter cable (50pin HD50 to HD68 SCSI) then I can see the HP Drive and works fine. I am sure the LSI20320IE controller works because is new. Could be the 4m cable too long? What are the maximal length for SCSI-3 device cables? Parallel-SCSI-Overview Do I interpret this correclty, that the cable should be under 3 meters?

THanks a lot for finding the reason why it will not work with the PCI-express SCSI controller.

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  • Take a look at SCSI under "SCSI interfaces". It says 12m maximum. Presuming the cable has no problem, you need to confirm the termination at the controller and device. This becomes more important at longer cable lengths. Also, confirm the controller is compatible with Ubuntu.
    – user3169
    Aug 28, 2021 at 5:15
  • Also, some systems will display available SCSI devices on system boot or in the BIOS menus. That would be a better basic check.
    – user3169
    Aug 28, 2021 at 5:19
  • Thanks, but I think it the cable as the termination is ok and at boot time I can see the controller. I have ordered a 3ft (about 1m) cable. Then I will see
    – Walter Schrabmair
    Aug 29, 2021 at 8:17

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