I decided to run a number of different tapes to try to determine whether my TK50Z drive was defective or the tapes were not bootable. Below are the results of the tests. Since in each case the results are somewhat different, I conclude that the drive reads OK, and that the tapes are suspect. Does anyone have a different perspective? - don ======================= ULTRIX APPLICATION TAPE ^^^^^^^^^^^^^^^^^^^^^^^ -MUA0 %VMB-F-SCBINT2, PC = 00007000, PSL = 041F0008 83 BOOT SYS -DUA0 -MUA0 %VMB-F-SCBINT2, PC = 00007000, PSL = 041F0008 83 BOOT SYS ?02 EXT HLT **** Infinite loop without the halt **** PC = 00002704 ^^^^^^^^^^^^ -MUA0 %VMB-F-ERR, PC = 00000765 %VMB-I-STS, R0 = 000008C2 84 FAIL ^^^^^^^^^^^^^^ -MUA0 %VMB-F-ERR, PC = 00000765 %VMB-I-STS, R0 = 000001F6 84 FAIL ^^^^^^^^^^^^^^^^ -MUA0 %VMB-F-ERR, PC = 00000765 %VMB-I-STS, R0 = 000008C2 84 FAIL Thats all folks!