Help! Online instance corruption

While in the process of upgrading from 7.10.UC1 to 7.24.UC4, an online chunk was accidentally mounted by and probably fsck'ed by the OS. The 7.10->7.24 upgrade was successfully completed. The engine was running in multiuser mode - no problem. When I shut down my x session to reboot, the server hung. When it restarted, it would not allow anybody to login. When I removed the ods start up script from /etc/rc2.d the machine went back to normal. When I realised what had happened to the chunk, I did some exploratory tests - oncheck -cr, oncheck -ce, oncheck -cc. Oncheck fell over checking the extents, complaining about a table called Informix with a huge tabid and offets. I then did a restore of my 7.10 level 0 system backup. The data was successfully restored, ods completed the recovery but the extents problem was still there. Now oninit won't work at all - it complains of a shared memory error - "Initialising DBSPACETEMP list .. oninit: PROBLEM WITH SHARED MEMORY INITIALISATION" I think that mounting the chunk as a drive on the box has seriously corrupted online's smi. Does anyone have any ideas on what to do next? My environment is : SUN Sparc 20, Solaris 2.4, Online 7.10.UC1->7.24.UC4 Thanks, Ciaran Kelly -- RTE, Engineering Software email: Ciaran.Kelly@rte.ie voice: +3531 2083927