I have noticed this error in the log: Sep 12 18:57:44 vts-post cyrus/imap[19629]: IOERROR: locking /var/lib/cyrus/domain/W/domain1/user/A/userbox.sub: Interrupted system call Soon afterwards I notice imapd runs at 99.8 % and I can not kill the process. It looks like the file is locked and can't be written to? I saw another file called userbox.sub.NEW but even that files can't be read. When I attempt the terminal freezes. I also noticed the system can't be rebooted as well. I don't know what could be causing this. Does anyone have any incite? Example: -rw------- 1 cyrus mail 31K Sep 12 18:22 user.seen -rw------- 1 cyrus mail 14K May 24 10:21 user.sub -rw------- 1 cyrus mail 4.0K Sep 11 18:25 user.sub.NEW I can view user.sub but it has not been updated since May and the user.sub.NEW apears as an binary file or a DB PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 19484 cyrus 25 0 154m 4772 3776 R 99.8 0.8 7:51.32 imapd -Adam ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html