Package: linux Version: 4.13.13-1~bpo9+1 Looking at the output of dmesg, I see warnings like this:
md0: Warning: Device sde3 is misaligned Checking the same disk with parted tells me it is aligned correctly: # parted /dev/sde GNU Parted 3.2 Using /dev/sde Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) align-check optimal 3 3 aligned Checking the disk with "fdisk -l" shows me: # fdisk -l /dev/sde Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes When the same disk is attached through a USB HDD dock, the "fdisk -l" output gives a different value for optimal I/O size: # fdisk -l /dev/sdb Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 33553920 bytes => 33553920 / 512 = 65535 sectors of 512 bytes When I partitioned the disk, I used MiB alignment (multiple of 2048 sectors of 512 bytes each) Is the warning from the md kernel module misleading or is parted align-check wrong? Can the warning be made more verbose to indicate why it believes the partition is not aligned correctly?
