SOLVED Reusing/partitioning disks from TrueNAS

[adrianwi]

I've just upgraded the 2 SSD drives I had as a jail pool and was planning on using the old ones to play around with some Raspberry Pi's.

I'm struggling to repartition them on macOS or using Linux on the Raspberry Pi. Does ZFS do something strange to them and how can I undo it?

Thanks

 

[HoneyBadger]

It formats them as GPT - the OS in question might not understand how to handle that partition table.

Can you overwrite the first bit of the drive with something like dd if=/dev/zero of=/dev/adaX bs=1M count=32 ? (Make sure you have the right drive identified!)

 

[Dan Tudora]

hello
if you have a Windows computer can use https://www.partitionwizard.com/ in a graphical interface and can do what you want with HDD
can erase/delete partition and can change from MBR to GPT schema of disk (HDDor SSD)
cheers

 

[adrianwi]

Thanks! I'd stumbled across the dd command from Google search, but the bs=1 count=32 save me several hours on the 2nd drive