On a Hipath V4.0 I have a strange issue. Originally found could not run commands due to all partitions in DEFECT status. Performed CHA/ACT DSSM to restore and within 5 minutes it was back in defect. Started to deactivate partitions one at a time and find that if AREA F is left deactivated all is well. All other partitions remain in service with no issue. I performed a STA-INIT on AREA F and activated it. System remains running with no issue. LOGBK files are created/written. C-FBTHIST and C-FBTXTRA are created. System will run with these files and no problems. When attempting to STA-HISTA all goes bad again. Entire disk goes to DEFECT status. I have tried restarting the A1 and get the same results. Everything is OK with AREA F deactivated but the system should not be left in this state since you cannot capture any errors. I find it hard to believe that I have a hardware issue since all other partitions and Unixware remain in service. The LOGBK will remain functioning also as long as the STA-INIT is performed on AREA F and no other file manipulations are attempted. So the system is writing to LOGBK on AREA F without issue. Anything else on AREA F appears to be offlimits as this triggers the DEFECT status. Any ideas??