[mamorim01]

At this stage the safest way to proceed (if there is nothing worth preserving on that disk) is to attempt a fresh IRIX 6.5 install as advised above. A procedure to upgrade from 6.2 to 6.5.x seems to exist but it is probably not for the faint of heart. See, for instance, an extract from the CD booklets:

For example, by following the instructions in the IRIX 6.5 Installation Instructions CD booklet, you can upgrade directly from IRIX 6.2 to 6.5.21.

http://csweb.cs.wfu.edu/~torgerse/Kokua/...reorg.html

The success of this procedure, I would imagine, would depend on following it to the letter, as well as on the applications which were previously installed, libraries, etc. I think it is going to be quite complicated to reverse the existing process and clear whatever error might be present.

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.