awschluk

In my case, that can only be true for drives less than 2TB, not 2TB drives.

Have you even bothered to read the response provided by bmartino1? And if you have, are you saying this individual is incorrect in full or in part? "That means: The disk is GPT It has a protective MBR (this is normal and required by spec) The filesystem is Linux-native (0FC63DAF…) Partition alignment is correct (starts at sector 64) There is no functional MBR partitioning in use"

Fantastic response! Thank you for being so thorough, you covered every angle, and every possible follow up question. So many hours of life wasted because of a UI mislabeling quirk haha!

That doesn't seem correct because as gdisk shows they are using GPT.

I am wondering if anyone has encountered this before, possible bug maybe, that causes 2TB drives or smaller to show partition format as MBR even when it is GPT? All the drives in my array show up as GPT, and then I tried adding another drive (this is my only drive smaller than 3TB), but no matter how many times I format it, zero out the partition etc, it just always end up showing as MBR under disk settings in the UNRAID web UI. I've been at this for days and have honestly lost track of everything I have tried, and I think I need a thread to track this so I can hopefully make some progress. Here is the 2TB disk info from gdisk that shows up as MBR... Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Command (? for help): p Disk /dev/sde: 3907029168 sectors, 1.8 TiB Model: ST2000DM008-2FR1 Sector size (logical/physical): 512/4096 bytes Disk identifier (GUID): 596C198C-80D0-430E-B669-C316003C3FF9 Partition table holds up to 128 entries Main partition table begins at sector 2 and ends at sector 33 First usable sector is 34, last usable sector is 3907029134 Partitions will be aligned on 64-sector boundaries Total free space is 93 sectors (46.5 KiB) Number Start (sector) End (sector) Size Code Name 1 64 3907029071 1.8 TiB 8300 Command (? for help): i Using 1 Partition GUID code: 0FC63DAF-8483-4772-8E79-3D69D8477DE4 (Linux filesystem) Partition unique GUID: F47F6310-EC83-4180-A13D-3586216B9B2B First sector: 64 (at 32.0 KiB) Last sector: 3907029071 (at 1.8 TiB) Partition size: 3907029008 sectors (1.8 TiB) Attribute flags: 0000000000000000 Partition name: '' And here is an example of one of my 3TB drives in my array that shows up correctly as GPT like all of the others... Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Command (? for help): p Disk /dev/sdg: 5860533168 sectors, 2.7 TiB Model: WDC WD3001FFSX-6 Sector size (logical/physical): 512/4096 bytes Disk identifier (GUID): 2C1F32DC-5714-4D4F-BAFB-8DD15956E1B6 Partition table holds up to 128 entries Main partition table begins at sector 2 and ends at sector 33 First usable sector is 34, last usable sector is 5860533134 Partitions will be aligned on 64-sector boundaries Total free space is 30 sectors (15.0 KiB) Number Start (sector) End (sector) Size Code Name 1 64 5860533134 2.7 TiB 8300 Command (? for help): i Using 1 Partition GUID code: 0FC63DAF-8483-4772-8E79-3D69D8477DE4 (Linux filesystem) Partition unique GUID: 0E6FBCC9-0F3E-487C-8D88-048984AAE86A First sector: 64 (at 32.0 KiB) Last sector: 5860533134 (at 2.7 TiB) Partition size: 5860533071 sectors (2.7 TiB) Attribute flags: 0000000000000000 Partition name: '' Any ideas?