Hi, We are running ADSM 3.1.2.57 on Aix 4.3.2 with STK 9710 library & DLT tape drives. Upgrade to TSM 3.7.3 is scheduled. Lately we have experienced on 3 occasions the above error message which required a server reboot. On the last occasion, we had 6 drives, one brought off-line(faulty) and the others were on line. However, ADSM can only use one drive. Eg if I start an offsite reclaim which required 2 drives, it failed. I have checked the error message but it is not helpful. We rebooted the server and things are fine. Any ideas why this happens ?? TIA, regards, Raymond Chao Unix Administrator IPAustralia, Canberra