I am trying to replicate my Array (2 ZFS-HDDs => Source disk1) and Cache Pool (2 ZFS-NVMEs, source "cache") to a Backup Pool (2 slots, but currently only 1 ZFS-HDD - other will follow; destination "backup").

 

@SpaceInvaderOne's script does snapshots, but then fails replication. Error:

cannot receive new filesystem stream: pool must be upgraded to receive this stream.
mbuffer: error: outputThread: error writing to at offset 0x40000: Broken pipe 
mbuffer: warning: error during output to : Broken pipe

 

What does "new filesystem stream" and "pool must be upgraded" mean?

 

For background:

At first, I created (using ZFS Master) one parent data set "replication" for two scripts (error see above), but then realized that "direct mirror" will only keep data sets that are in source, so replication would delete each other. So I created two parent data sets "disk1-backup" and "cache-backup", one for each script. I also tried to make the backup pool just one slot (no empty slots). Same error, though.

 

I also posted this issue as a response to a similar issue in the "programming" forums section - But I think it is better to make a separate thread, and it seems to fit better in this forums section - Sorry for the doublet.

Try running on the destination pool:

zpool upgrade <pool name>

Awesome - Thanks. That worked like a charm.

 

Ladies and gentlemen: We have backups! 🙂