RAID 會被意外配置兩次嗎？

我從 Hetzner 租了一台伺服器，它有 2 個 8TB 磁碟。我相信它們被列為 RAID 1（儘管再也找不到任何東西來證實這一點），我認為這會給我 16 TB 的可用空間作為 RAID 1。然後我執行了這個腳本，它設置了 RAID 和邏輯卷。

然而，最終結果是一個約 8TB 的（邏輯）磁碟。可能是 RAID 1 鏡像被執行了兩次？如果是這樣，我將如何證實這個假設？

這裡是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

以及udevadm info –query=all –name=/dev/sda

Raid 1 = 鏡像所以 8TB 可用空間和 2 個 8TB 驅動器。您想要的是 Raid Level 0，即條帶化，為您提供兩個驅動器的 16TB 作為一個邏輯設備。

引用自：https://serverfault.com/questions/1107276