使用以下命令创建逻辑卷时，内核日志告诉我存在一些未对齐情况：
$ sudo vgcreate shinymarengo --dataalignment 1M /dev/sda /dev/sdb /dev/sdc
Volume group "shinymarengo" successfully created
$ sudo lvcreate --type raid5 -L 4T --nosync --stripesize 1M -n shinymarengo_data shinymarengo
WARNING: New raid5 won't be synchronised. Don't read what you didn't write!
Logical volume "shinymarengo_data" created.
起初你会认为一切都很好，但当查看时dmesg会出现一些警告：
[ +0.000052] device-mapper: table: 254:6: adding target device dm-3 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=512, start=0
[ +0.000010] device-mapper: table: 254:6: adding target device dm-5 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=0, start=0
[ +0.000010] device-mapper: table: 254:6: adding target device dm-3 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=512, start=0
[ +0.000008] device-mapper: table: 254:6: adding target device dm-5 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=0, start=0
[ +0.000290] device-mapper: table: 254:6: adding target device dm-3 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=512, start=0
[ +0.000009] device-mapper: table: 254:6: adding target device dm-5 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=0, start=0
[ +0.000008] device-mapper: table: 254:6: adding target device dm-3 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=512, start=0
[ +0.000008] device-mapper: table: 254:6: adding target device dm-5 caused an alignment inconsistency: physical_block_size=4096, logical_block_size=512, alignment_offset=0, start=0
似乎lsblk在讲述同一个故事：
$ lsblk -t
NAME ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED RQ-SIZE RA WSAME
sda 0 4096 0 4096 512 1 mq-deadline 58 128 32M
├─shinymarengo-shinymarengo_data_rmeta_0 0 4096 0 4096 512 1 128 128 32M
│ └─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
└─shinymarengo-shinymarengo_data_rimage_0 0 4096 0 4096 512 1 128 128 32M
└─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
sdb 0 4096 0 4096 512 1 mq-deadline 58 128 32M
├─shinymarengo-shinymarengo_data_rmeta_1 512 4096 0 4096 512 1 128 128 32M
│ └─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
└─shinymarengo-shinymarengo_data_rimage_1 512 4096 0 4096 512 1 128 128 32M
└─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
sdc 0 4096 0 4096 512 1 mq-deadline 58 128 32M
├─shinymarengo-shinymarengo_data_rmeta_2 0 4096 0 4096 512 1 128 128 32M
│ └─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
└─shinymarengo-shinymarengo_data_rimage_2 0 4096 0 4096 512 1 128 128 32M
└─shinymarengo-shinymarengo_data -1 1048576 2097152 4096 512 1 128 6144 0B
我可以采取不同的措施来消除错位，或者这可能只是一个错误？
编辑 - 平台详细信息：
- 树莓派 4B 2GB
- 树莓派克星
- Linux 4.19.108
- LVM 2.03.02(2)