다음 명령을 사용하여 논리 볼륨을 생성할 때 커널 로그에 일부 정렬 오류가 있음이 표시됩니다.
$ 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.
처음에는 모든 것이 괜찮다고 생각하겠지만, 보면 dmesg몇 가지 경고가 있습니다.
[ +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
lsblk다음과 같은 이야기를 하는 것 같습니다 .
$ 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
정렬 불량을 제거하기 위해 다르게 수행할 수 있는 작업이 있습니까? 아니면 단순히 버그일 수 있습니까?
편집 - 플랫폼 세부정보:
- 라즈베리 파이 4B 2GB
- 라즈베리 파이 네메시스
- 리눅스 4.19.108
- LVM 2.03.02(2)