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New View the Bug / Feature Tracker

New drive is format with MBR instead of GPT

By gyto6

· 579 views
  • Solved

Hi,

Just added a new drive my zpool for the time with the GUI.

My concern is that I noticed that my drive has been set with MBR instead of GPT contrary to my whole zpool. I reproduced and still get an MBR.

Capture d'écran 2026-02-01 214049.png

I suggest any format to be set with GPT instead of MBR, as MBR is kinda deprecated and put some problems with huge drives.

Regards

PS : I'm aware that Unraid will format with MBR for disk lower than 2TB. The problem here is that I've imported my pool to Unraid when ZFS has been officially supported. This kind of behaviour could concerns any ZFS users who did so, and could probably be troubleshooting for some raidz with disks lower than 2TB if a same vdev is mixed with GPT and MBR.

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