root@pve3:~# lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda           8:0    1     0B  0 disk
sdb           8:16   1     0B  0 disk
sdc           8:32   1     0B  0 disk
sdd           8:48   1     0B  0 disk
sr0          11:0    1  1024M  0 rom
sr1          11:1    1  1024M  0 rom
sr2          11:2    1  1024M  0 rom
sr3          11:3    1  1024M  0 rom
nvme10n1    259:0    0   2.9T  0 disk
nvme7n1     259:1    0   2.9T  0 disk
nvme8n1     259:2    0   2.9T  0 disk
nvme6n1     259:3    0   2.9T  0 disk
nvme11n1    259:4    0   2.9T  0 disk
nvme5n1     259:5    0   2.9T  0 disk
nvme2n1     259:6    0   2.9T  0 disk
nvme4n1     259:7    0   2.9T  0 disk
nvme0n1     259:8    0 894.3G  0 disk
├─nvme0n1p1 259:10   0  1007K  0 part
├─nvme0n1p2 259:11   0     1G  0 part
└─nvme0n1p3 259:12   0   879G  0 part
nvme3n1     259:9    0   2.9T  0 disk
nvme12n1    259:13   0   2.9T  0 disk
nvme9n1     259:14   0   2.9T  0 disk
nvme1n1     259:15   0 894.3G  0 disk
├─nvme1n1p1 259:16   0  1007K  0 part
├─nvme1n1p2 259:17   0     1G  0 part
└─nvme1n1p3 259:18   0   879G  0 part /
root@pve3:~# mdadm --detail
mdadm: No devices given.
root@pve3:~# nano /etc/mdadm/mdadm.conf
root@pve3:~# mdadm --create --verbose /dev/md0 -l 10 -n 10 /dev/nvme2n1 /dev/nvme3n1 /dev/nvme4n1 /dev/nvme5n1 /dev/nvme6n1 /dev/nvme7n1 /dev/nvme8n1 /dev/nvme9n1 /dev/nvme10n1 /dev/nvme11n1
mdadm: layout defaults to n2
mdadm: layout defaults to n2
mdadm: chunk size defaults to 512K
mdadm: partition table exists on /dev/nvme2n1
mdadm: partition table exists on /dev/nvme2n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme3n1
mdadm: partition table exists on /dev/nvme3n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme4n1
mdadm: partition table exists on /dev/nvme4n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme5n1
mdadm: partition table exists on /dev/nvme5n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme6n1
mdadm: partition table exists on /dev/nvme6n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme7n1
mdadm: partition table exists on /dev/nvme7n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme8n1
mdadm: partition table exists on /dev/nvme8n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme9n1
mdadm: partition table exists on /dev/nvme9n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme10n1
mdadm: partition table exists on /dev/nvme10n1 but will be lost or
       meaningless after creating array
mdadm: partition table exists on /dev/nvme11n1
mdadm: partition table exists on /dev/nvme11n1 but will be lost or
       meaningless after creating array
mdadm: size set to 3125484544K
mdadm: automatically enabling write-intent bitmap on large array
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
root@pve3:~# mdadm --detail --scan >> /etc/mdadm/mdadm.conf
root@pve3:~# update-initramfs -u
update-initramfs: Generating /boot/initrd.img-6.8.12-10-pve
Running hook script 'zz-proxmox-boot'..
Re-executing '/etc/kernel/postinst.d/zz-proxmox-boot' in new private mount namespace..
Copying and configuring kernels on /dev/disk/by-uuid/CDB6-63C3
        Copying kernel and creating boot-entry for 6.8.12-10-pve
        Copying kernel and creating boot-entry for 6.8.12-9-pve
Copying and configuring kernels on /dev/disk/by-uuid/CDC6-2548
        Copying kernel and creating boot-entry for 6.8.12-10-pve
        Copying kernel and creating boot-entry for 6.8.12-9-pve
root@pve3:~# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid10 nvme11n1[9] nvme10n1[8] nvme9n1[7] nvme8n1[6] nvme7n1[5] nvme6n1[4] nvme5n1[3] nvme4n1[2] nvme3n1[1] nvme2n1[0]
      15627422720 blocks super 1.2 512K chunks 2 near-copies [10/10] [UUUUUUUUUU]
      [>....................]  resync =  0.0% (14200448/15627422720) finish=1301.0min speed=200009K/sec
      bitmap: 117/117 pages [468KB], 65536KB chunk

unused devices: <none>
root@pve3:~# mdadm --detail
mdadm: No devices given.
root@pve3:~# mdadm --detail /dev/md0
/dev/md0:
           Version : 1.2
     Creation Time : Fri Apr 25 16:54:10 2025
        Raid Level : raid10
        Array Size : 15627422720 (14.55 TiB 16.00 TB)
     Used Dev Size : 3125484544 (2.91 TiB 3.20 TB)
      Raid Devices : 10
     Total Devices : 10
       Persistence : Superblock is persistent

     Intent Bitmap : Internal

       Update Time : Fri Apr 25 16:55:38 2025
             State : clean, resyncing
    Active Devices : 10
   Working Devices : 10
    Failed Devices : 0
     Spare Devices : 0

            Layout : near=2
        Chunk Size : 512K

Consistency Policy : bitmap

     Resync Status : 0% complete

              Name : pve3:0  (local to host pve3)
              UUID : d87cfe99:e3cefa6b:f0982d1c:b7740266
            Events : 16

    Number   Major   Minor   RaidDevice State
       0     259        6        0      active sync set-A   /dev/nvme2n1
       1     259        9        1      active sync set-B   /dev/nvme3n1
       2     259        7        2      active sync set-A   /dev/nvme4n1
       3     259        5        3      active sync set-B   /dev/nvme5n1
       4     259        3        4      active sync set-A   /dev/nvme6n1
       5     259        1        5      active sync set-B   /dev/nvme7n1
       6     259        2        6      active sync set-A   /dev/nvme8n1
       7     259       14        7      active sync set-B   /dev/nvme9n1
       8     259        0        8      active sync set-A   /dev/nvme10n1
       9     259        4        9      active sync set-B   /dev/nvme11n1
root@pve3:~#