SMR technology is a timebomb waiting to go off in a ZFS file system. This quote from Slashdot... Want to know more? Start with this community thread Update: WD Red SMR Drive Compatibility with ZFS TrueCommand has a built-in check for known WD SMR drives on connected TrueNAS servers. However...

I have an NTFS 2T drive that I transferred a bunch of media files onto from a Windows system. Now I have shutdown, added the drive into the system, and powered back up twice. I don't see the unit. I did the same thing with a different drive bay slot - same thing. I can see the disk power up...