Ultra 4 dead disk & re-striping time

Yes I removed dead disk while re-striping was occurring. I figured with front panel displaying 0.0% complete for last 4-5 days it was not doing anything. I have current backup that should be good on external USB drive. I was able to access my data OK after disk 4 went dead. But once I tried to export log files the unit hung and has since been unable to access. if it really was re-stripping curious if I power off unit what will happen . I could go to backup if I need but I also have 'Time Machine' partition that I don't have backed up but if I loose that I can recover.