"zfs umount -f" fails when pool is busy · Issue #2435 ...
github.com › openzfs › zfsJun 28, 2014 · # /tmp/testme.ksh umount: /var/tmp/test: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) cannot unmount '/var/tmp/test': umount failed zfs umount test/test: '1' test on /test type zfs (rw,relatime,xattr,noacl) test/test on /var/tmp/test type zfs (rw,relatime,xattr,noacl) umount2: Device or resource busy umount: /var/tmp/test ...
Unmounting zFS file systems before copying or moving
www.ibm.com › docs › SSLTBW_2Unmounting zFS file systems before copying or moving. When a user mounts (attaches) an aggregate to a particular system, zFS records the name of the system, the sysplex name (when it is a sysplex), and a time stamp in the zFS aggregate (in block zero of the aggregate). In addition, while the aggregate is mounted, zFS updates the time stamp ...