WD20EARX format in UBUNTU?

WD Internal Drives Desktop & Mobile Drives
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If there is an alignment jumper at position 7-8, remove it (it may not be functional in this model, anyway). You can use GParted to create partitions on mebibyte boundaries. These will automatically be aligned. It may be that your “disk utility” is attempting to create a non-aligned partition beginning at sector 63.