Today coworker woke me up with critical problem : mails simply stopped working. No matter what I tried, I always got the same message : no space left on device. This is c/p from log file May 19 07:29:55 pro1 postgrey: FATAL: ERROR: can't create DB environment: No space left on device (dbdir: /var/lib/postgrey uid/gid: 117,117) May 19 07:29:56 pro1 postfix/tlsmgr: error: open database /var/lib/postfix/smtpd_scache.db: No space left on device May 19 07:29:56 pro1 postfix/tlsmgr: error: open database /var/lib/postfix/smtp_scache.db: No space left on device May 19 07:29:57 pro1 amavis: (!!)TROUBLE in pre_loop_hook: BDB can't create db env. at /var/lib/amavis/db: No space left on device, No space left on device. at (eval 92) line 312. Of course that was not a case, there is plenty of space on all volumes. Except one : /dev/mapper/vg--ssd-lv--root is 100% full and I have no idea what to do with it. No configuration was not changed for quite some time now. When I moved operations on another (mirror) server, everything works smoothly. But my concerns are that if I move everything back to the first server the problem will repeat. I already googled, but could not find any usable solution. Any idea would be appreciated.