Problem after power failure

[Arwen]

@davistw

True but a Truenas system definitely needs a UPS. Linux and Truenas are not made for pull plug type of power failures. I can testify…

ZFS was specifically designed to work WITHOUT a UPS:

ZFS pools & power loss - you won't lose data

There is sometimes misconceptions about ZFS losing data due to power loss. The subject of power loss, (or OS crash), and then not being able to import a ZFS pool comes up here in the forums a few times a month. Here is the skinny on what should happen. There are several things to un-pack about power loss affecting ZFS and data loss. Any previously stored data in a ZFS pool can not be / is not lost on power loss. Exception is in hardware failures that affect pool redundancy. Like the loss of b…

That said, we have started to see a lot more ZFS pools that won’t import after power loss than we did years ago. Perhaps Linux is doing enough things different from FreeBSD to cause ZFS problems.