Folks I have two USB connected drives, configured as a mirrored-pair in ZFS. It's been working fine UNTIL I updated Centos from 3.10.0-862.14.4.el7.x86_64 to 3.10.0-957.1.3.el7.x86_64 The import of the pools didn't happen at boot. When I tried executing: zpool list I got the diagnostic suggesting I do /sbin/modprobe zfs And that command claimed the module didn't exist. YUM claims my updates are all up-to-date. I had to revert back to 862. Help? David