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RAID 会被意外配置两次吗？

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RAID 会被意外配置两次吗？

我从 Hetzner 租了一台服务器，它有 2 个 8TB 磁盘。我相信它们被列为 RAID 1（虽然再也找不到任何可以证实这一点的东西），我本以为这会给我 16 TB 的可用空间作为 RAID 1。然后我运行这个脚本，设置 RAID 和逻辑卷。

但最终结果是单个（逻辑）磁盘约 8TB。可能是正在进行 RAID 1 镜像两次? 如果是，我该如何证实这个假设？

这是lsblk：

lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINTS
sda               8:0    0  7.3T  0 disk  
├─sda1            8:1    0    1M  0 part  
└─sda2            8:2    0  7.3T  0 part  
  └─md127         9:127  0  7.3T  0 raid1 
    └─vg0-root0 254:0    0  6.9T  0 lvm   /nix/store
                                          /
sdb               8:16   0  7.3T  0 disk  
├─sdb1            8:17   0    1M  0 part  
└─sdb2            8:18   0  7.3T  0 part  
  └─md127         9:127  0  7.3T  0 raid1 
    └─vg0-root0 254:0    0  6.9T  0 lvm   /nix/store
                                          /

fdisk -l：

fdisk -l
Disk /dev/sdb: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: HGST HUH721008AL
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 0D66DC9A-41E1-44B0-AF57-EDF422A7B4C4

Device     Start         End     Sectors  Size Type
/dev/sdb1   2048        4095        2048    1M BIOS boot
/dev/sdb2   4096 15628052479 15628048384  7.3T Linux filesystem


Disk /dev/sda: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: HGST HUH721008AL
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 1FE75135-DDF0-4DF7-B79D-4890D594D12A

Device     Start         End     Sectors  Size Type
/dev/sda1   2048        4095        2048    1M BIOS boot
/dev/sda2   4096 15628052479 15628048384  7.3T Linux filesystem


Disk /dev/md127: 7.28 TiB, 8001425506304 bytes, 15627784192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/vg0-root0: 6.91 TiB, 7601349722112 bytes, 14846386176 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

df -h：

df -h
Filesystem                Size      Used Available Use% Mounted on
devtmpfs                  6.3G      4.0K      6.3G   0% /dev
tmpfs                    62.9G     16.0K     62.9G   0% /dev/shm
tmpfs                    31.4G      6.1M     31.4G   0% /run
tmpfs                    62.9G    456.0K     62.9G   0% /run/wrappers
/dev/disk/by-uuid/fa8731e9-00e6-44fa-aa0f-f86ce2a1ca03
                          6.9T      1.6T      5.0T  24% /
/dev/disk/by-uuid/fa8731e9-00e6-44fa-aa0f-f86ce2a1ca03
                          6.9T      1.6T      5.0T  24% /nix/store
tmpfs                    12.6G     12.0K     12.6G   0% /run/user/0
tmpfs                    12.6G         0     12.6G   0% /run/user/1005

和udevadm 信息 --query=all --name=/dev/sda

答案1

Raid 1 = 镜像，因此 8TB 可用空间带有 2 个 8TB 驱动器。您需要的是 Raid Level 0，即条带化，将两个驱动器的 16TB 作为一个逻辑设备提供给您。

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