一般来说，Linux创建分区使用fdisk命令，可以自动对齐磁盘。然而，fdisk无法处理大于2TB的磁盘文件。这种情况下，需要使用parted命令去创建分区。
parted创建分区需要手动指定分区开始与结束位置，可能会面临磁盘不对齐的问题（提示：Warning: The resulting partition is not properly aligned for best performance.）
所以需要手动去计算分区起点来对齐磁盘。
Parted
[root@ARKITDBDR2 ~]# parted /dev/mapper/ORAu01
GNU Parted 2.1
Using /dev/mapper/ORAu01
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel GPT
(parted) print
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/ORAu01: 6.05TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
(parted) mkpart primary 0.00T 100%
(parted) print
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/ORAu01: 6.05TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 0.00TB 6.05TB 6.05TB primary
(parted)
(parted) quit
计算分区起点
输入0.00T有时候可以免于计算起点
mkpart primary 0.00T 100%
# cat /sys/block/sdb/queue/optimal_io_size
1048576
# cat /sys/block/sdb/queue/minimum_io_size
262144
# cat /sys/block/sdb/alignment_offset
0
# cat /sys/block/sdb/queue/physical_block_size
512
起点=(optimal_io_size + alignment_offset) / physical_block_size = (1048576 + 0) / 512 = 2048s
所以分区命令是
mkpart primary 2048s 100%
检查是否正确对齐
(parted) align-check optimal 1
1 aligned
如果还有问题，则需要进一步修正，可以参考
https://bdoga.com/how-to-fix-warning-device-is-not-properly-aligned-with-parted/
格式化
mkfs.ext4 /dev/sdb1
