Here at work our machines are required to run off of old Sun Sparc5's (1995) all running a UFS architecture on the hard drives due to a Solaris 5.3ish base. The way they are configured it is not possible (that I have found) to hook up a second SCSI hard drive so that it can recognize it and allow me to do an internal copy. In order to increase reliability of these computers we purchased a raid array with a SCSI to SATA converter inside to write to 2.5" internals. This raid setup has worked successfully on the computers that use IDE type connections, using the same arrays also a UFS architecture.
I have tried an OmniSCSI-One-to-One tool, it properly clipped down the size and copied all the directories but did not move any of the actual data. I was able to read the hard drive after with UFS Explorer and verified the directories were present. Found out when I took it to the machine that it had no data on it.
I have authorization to purchase a computer just for the task of copying and backing up these drives. What OS or program would be best recommended to perform a copy that I know will work without risking a machine due to a corrupted drive? The computer will not be attached to a network, it will be a standalone. Keep in mind these are SCSI drives so I have to use a PCI SCSI converter too, if it is relevant. I have tried Ubuntu, it could not even mount the drives they are so old. All of the drives work as the machines are still running.