Adicionando disco à matriz RAID1 degradada

Question

Estou tentando adicionar um disco (sdc1) a uma matriz RAID1 degradada (md126), mas não sei como proceder. Qualquer ajuda será apreciada porque não quero perder nenhum dado na unidade.

A saída não está bem formatada no post, portanto, um screencap é anexado para maior clareza

cat /proc/mdstat

Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
md126 : active raid1 sdd[0]
      9766433792 blocks super external:/md127/0 [2/1] [_U]

md127 : inactive sdd[0](S)
      2940 blocks super external:imsm

unused devices: <none>

lsblk

NAME           MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda              8:0    0   1.9T  0 disk  
├─sda1           8:1    0   500M  0 part  
├─sda2           8:2    0   1.9T  0 part  
└─sda3           8:3    0   455M  0 part  
sdb              8:16   0   1.9T  0 disk  
├─sdb1           8:17   0 238.4M  0 part  /boot
└─sdb2           8:18   0   1.9T  0 part  
  └─sdb2_crypt 253:0    0   1.9T  0 crypt /
sdc              8:32   0   9.1T  0 disk  
└─sdc1           8:33   0   9.1T  0 part  
sdd              8:48   0   9.1T  0 disk  
└─md126          9:126  0   9.1T  0 raid1 
  └─md126p1    259:2    0   9.1T  0 md    /mnt/10TB
sde              8:64   0 447.1G  0 disk  
├─sde1           8:65   0   450M  0 part  
├─sde2           8:66   0   100M  0 part  
├─sde3           8:67   0    16M  0 part  
└─sde4           8:68   0 446.6G  0 part  
nvme0n1        259:0    0   1.1T  0 disk  

    

Answer 1

Leia man dmraid . Diz, em parte:

   {-R| --rebuild} RAID-set [device-path]
          Rebuild  raid  array after a drive has failed and a new drive is added.  For Intel chipset based systems, there are two methods in which a new drive is added to
          the system.

          1. Using OROM to identify a new drive
              During system reboot, enter OROM and mark the new drive as the rebuild drive.
              After booting to the OS, use the dmraid command to rebuild.

              Example: dmraid -R raid_set

          2. Using dmraid to identify a new drive
              Boot to the OS and use the dmraid command with the new drive as the second parameter.

              Example: dmraid -R raid_set /dev/sdc

          3. Using hot spare drive
              Mark a drive as hot spare using the "dmraid -f isw -S" command. Then use the dmraid command to start the rebuild.

              Example: dmraid -R raid_set