Drive Sector Size Issue

Hey all! Fairly new to ZFS, so I’m struggling with what is causing issues on my pool

My Setup: * Ubuntu Server 24.04.2 * 1 pool * 2 raidz2 vdev’s * 1 vdev is 8x8TB drives * 1 vdev is 8x4TB drives * ashift=12

My issue is I was fairly ignorant and used 3, 4tb drives that were 512n sector size. Everything has worked fine until now.

Now that I’m trying to upgrade the smaller vdev to 12tb, 4kn drives, I am getting read errors after replacing one of the 512n drives. Specifically: “Buffer I/O error on dev sdm1, logical block 512, async page read” Which from my research is caused by mismatched sector sizes.

Any idea how I can move forward? I plan to replace all 8 of the 4tb drives, but until I can figure out the read errors, I can’t do that