10 | | * RAID -- mdadm should use 0.90 or 1.0 [https://raid.wiki.kernel.org/index.php/RAID_superblock_formats superblocks], which are written at the end of the device. If metadata version 1.1 or 1.2 are used, then the `data_offset` field needs to be a multiple of 8192. [http://www.issociate.de/board/goto/2027709/Alignment_of_RAID_on_specific_boundary.html there does not seem to be a way to force a custom data_offset with metadata 1.1 or 1.2] (i filed [DebianBug:614841] as a wishlist). in squeeze, 1.2 is the default, so use `--metadata 1.0` during `mdadm --create` :( |