Hi all, [Regarding Mirrordisc/iX on MPE/iX 4.0]: This problem really has me stumped. We haven't been able to VSCLOSE <setname>; SPLIT on one of three mirrored volumesets for several days because it has always been seen to be 'in use'. VSUSER prints a header, but no users (unlike other sets, where no header is printed and appropriate message something like 'no users reserved' or whatever). FSCHECK reports absolutely no problems with directory, file labels, extent mapping or locked files. There are no users (other than operator or manager.sys) and no jobs. SHOWQ and a deep examination of all active and dormant PINs show no files open on the volumeset. I did a RS early this morning and got an unprecedented shutdown message (just before the final SHUT 6 message): SYSTEM PIN 28 TIMED OUT (SHUT 9) The system reset and reboot proceeded normally, even a little faster than usual. PIN 28 is once again a system PIN, but I can't find out what the process is or, naturally, what it might be doing. Even with disc mirroring, one doesn't like to go for days without a tape copy. I'm relieved it has recovered, but what was happening? Any ideas? Ron [log in to unmask]