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Ajout de disque à une matrice RAID1 dégradée

J'essaie d'ajouter un disque (sdc1) à une matrice RAID1 dégradée (md126), mais je ne sais pas comment procéder. Toute aide sera appréciée car je ne veux pas perdre de données sur le disque.

La sortie n'est pas bien formatée dans la publication, donc un screencap est joint pour plus de clarté

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
partitioninghard-driveraidmdadm
2
Merilla Michael

Lis man dmraid. Il dit, en partie:

   {-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
1
waltinator