[gmcenroe]

Very good news on this problem. I bought another Toshiba 6201B CDROM that was listed on ebay as coming from a Sun workstation with grey faceplate. It was 1999 model and after loading it up, it worked great!! I ran confidence test with both SGI installation disk and audio CD. It recognized both media types with the usual music note  on the desktop icon and and arrow for the data disk. The door also opens with the computer vertical without any problem. It does not play audio CDs, but I really don't care so much about that, I just wanted to be able to install software off disks and that worked fine. So bottom line is Toshiba 6201B drives do work as my original one did, the unit that I returned to the seller in Texas was a piece of crap, hopefully I will get my money back from that seller. The error on trying to play audio CD was something like cannot open error 0. I don't know what that means, maybe it just can't read audio CDs. The 6201B does not have byte block jumper setting so it must adjust or is set by default to 512 byte block.