我在 ubuntu 18.04 服务器上有一个 1TB 硬盘，想在 raid1 中添加 2 个 6TB 硬盘。现在我的文件系统在 1TB HD 上是只读的，其他两个驱动器不再显示，并且大多数程序无法运行（vim、scp 等）。如何从零开始使用 raid 驱动器（重新格式化它们）但修复我现有的驱动器？即使尝试 cd + tab 也会显示错误：
bash: cannot create temp file for here-document: Read-only file system
我是如何来到这里的：
我尝试按照本教程将两个硬盘配置为 raid1：
https://www.linuxbabe.com/linux-server/linux-software-raid-1-setup
但是，我使用的是 ubuntu 服务器 18.04，因此 Linux RAID 自动检测 (fd) 不是一个选项。我为 Linux RAID 选择了 29。
我设置了 raid，并且 sudo fsdisk -l 的输出看起来像教程一样很好，直到我尝试在 /mnt/raid1 中创建目录。由于权限原因，它不允许我使用，也不允许我 chown /mnt/raid1。
跑步sudo fsdisk -l
在其中一个新驱动器上显示以下消息：
The backup GPT table is corrupt, but the primary appears OK, so that will be used.
sudo fsdisk -l 输出与当时这篇文章相同https://ubuntuforums.org/showthread.php?t=2361339， 所以我做了：
sudo umount /dev/md0
sudo mdadm --stop /dev/md0
mdadm --assemble --scan
然后我无法再看到或访问 /dev/sdb1 /dev/sdc1 并且 md0 的重组失败。
我shutdown -r打开服务器，看看它是否允许我查看驱动器，但现在它重新启动，没有任何作用，我什至无法再次关闭它：
$ sudo shutdown now
Failed to open /dev/initctl: No such device or address
Failed to talk to init daemon.
sudo fdisk -l 输出现在显示我的原始硬盘驱动器的所有分区，并且不显示两个新驱动器。它曾经不显示所有这些分区：
$ sudo fdisk -l
Disk /dev/loop0: 212.1 MiB, 222388224 bytes, 434352 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop1: 3.1 MiB, 3248128 bytes, 6344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop2: 88.7 MiB, 92983296 bytes, 181608 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop3: 89 MiB, 93327360 bytes, 182280 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop4: 217.8 MiB, 228388864 bytes, 446072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop5: 3.1 MiB, 3252224 bytes, 6352 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop6: 11.7 MiB, 12242944 bytes, 23912 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: AF308587-0A23-464F-9CF7-1C3D17ADA860
Device Start End Sectors Size Type
/dev/sda1 2048 4095 2048 1M BIOS boot
/dev/sda2 4096 2101247 2097152 1G Linux filesystem
/dev/sda3 2101248 1953521663 1951420416 930.5G Linux filesystem
Disk /dev/mapper/ubuntu--vg-ubuntu--lv: 337 GiB, 361842606080 bytes, 706723840 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/ubuntu--vg-lv--ml: 434.8 GiB, 466876366848 bytes, 911867904 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes