[RetroGamer1985]

If you have a good set of IRIX 6.5 CDs then I would definitely start from scratch, the following procedure as well as the information contained in the installation booklets can help.

http://www.futuretech.blinkenlights.nl/6.5inst.html

You may wish to remove and set the existing disk aside for further examination in case there could be something worth preserving there, as it can always be mounted as a secondary disk once you have a working disk with a fresh IRIX copy. You can order a new SCSI drive with 80 pins (SCA type) or use an older SCSI drive with 50 pins using an 80/50 pin adapter. My Indigo2 came with two old disks fitted with 80/50 adapters, not sure whether that would be standard or just an oddity.

I would say that's standard at this point in time.  I posted here https://forums.irix.cc/thread-485-post-3...ml#pid3746 the type of SCSI disk and adapter I use in my Indigo2.

But I would def agree - put the current drive to the side and try to do a fresh install on a new disk.

already solve the problem now I can use IRIX in my SGI, thanks for the help