MDADM can't assemble RAID5

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1

Hi,
I just installed Fedora 40 KDE Desktop and I have 3 disk (sdb,sdc,sdd) in RAID5 but mdadm fails to assemble the array:

$ sudo mdadm -Asv
mdadm: looking for devices for further assembly
mdadm: /dev/zram0 is not attached to Intel(R) RAID controller.
mdadm: No OROM/EFI properties for /dev/zram0
mdadm: no RAID superblock on /dev/zram0
mdadm: no RAID superblock on /dev/nvme0n1p2
mdadm: no RAID superblock on /dev/nvme0n1p1
mdadm: no IMSM anchor on /dev/nvme0n1
mdadm: Failed to load all information sections on /dev/nvme0n1
mdadm: no RAID superblock on /dev/nvme0n1
mdadm: No OROM/EFI properties for /dev/sdd
mdadm: no RAID superblock on /dev/sdd
mdadm: No OROM/EFI properties for /dev/sdc
mdadm: no RAID superblock on /dev/sdc
mdadm: No OROM/EFI properties for /dev/sdb
mdadm: no RAID superblock on /dev/sdb
mdadm: no RAID superblock on /dev/sda3
mdadm: no RAID superblock on /dev/sda2
mdadm: no RAID superblock on /dev/sda1
mdadm: No OROM/EFI properties for /dev/sda
mdadm: no RAID superblock on /dev/sda
mdadm: looking for devices for /dev/md/Alfred
mdadm: no recogniseable superblock on /dev/zram0
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p2
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p1
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1
mdadm: No OROM/EFI properties for /dev/sdd
mdadm: no RAID superblock on /dev/sdd
mdadm: No OROM/EFI properties for /dev/sdc
mdadm: no RAID superblock on /dev/sdc
mdadm: No OROM/EFI properties for /dev/sdb
mdadm: no RAID superblock on /dev/sdb
mdadm: no recogniseable superblock on /dev/sda3
mdadm: no recogniseable superblock on /dev/sda2
mdadm: Cannot assemble mbr metadata on /dev/sda1
mdadm: Cannot assemble mbr metadata on /dev/sda

More information:

$ sudo mdadm --examine --scan
ARRAY metadata=imsm UUID=1aec10af:6d9fa2b7:a3cccead:a6a84d7b
ARRAY /dev/md/Alfred container=1aec10af:6d9fa2b7:a3cccead:a6a84d7b member=0 UUID=03717b04:a867aa6c:556ddc4d:cdfc1e9c

$ sudo mdadm --examine /dev/sdb
/dev/sdb:
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.2.02
    Orig Family : 6cadbe34
         Family : 6cadbe34
     Generation : 00001091
  Creation Time : Unknown
     Attributes : All supported
           UUID : 1aec10af:6d9fa2b7:a3cccead:a6a84d7b
       Checksum : 8253e980 correct
    MPB Sectors : 2
          Disks : 3
   RAID Devices : 1

  Disk00 Serial : 31124S3051215884
          State : active
             Id : 00000001
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

[Alfred]:
       Subarray : 0
           UUID : 03717b04:a867aa6c:556ddc4d:cdfc1e9c
     RAID Level : 5
        Members : 3
          Slots : [UUU]
    Failed disk : none
      This Slot : 0
    Sector Size : 512
     Array Size : 2000420864 (953.88 GiB 1024.22 GB)
   Per Dev Size : 1000210696 (476.94 GiB 512.11 GB)
  Sector Offset : 0
    Num Stripes : 15628288
     Chunk Size : 32 KiB
       Reserved : 0
  Migrate State : idle
      Map State : normal
    Dirty State : clean
     RWH Policy : off
      Volume ID : 1

  Disk01 Serial : 31124S3051211841
          State : active
             Id : 00000002
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

  Disk02 Serial : 31124S3051211245
          State : active
             Id : 00000003
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)


$ sudo mdadm --examine /dev/sdc
/dev/sdc:
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.2.02
    Orig Family : 6cadbe34
         Family : 6cadbe34
     Generation : 00001091
  Creation Time : Unknown
     Attributes : All supported
           UUID : 1aec10af:6d9fa2b7:a3cccead:a6a84d7b
       Checksum : 8253e980 correct
    MPB Sectors : 2
          Disks : 3
   RAID Devices : 1

  Disk01 Serial : 31124S3051211841
          State : active
             Id : 00000002
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

[Alfred]:
       Subarray : 0
           UUID : 03717b04:a867aa6c:556ddc4d:cdfc1e9c
     RAID Level : 5
        Members : 3
          Slots : [UUU]
    Failed disk : none
      This Slot : 1
    Sector Size : 512
     Array Size : 2000420864 (953.88 GiB 1024.22 GB)
   Per Dev Size : 1000210696 (476.94 GiB 512.11 GB)
  Sector Offset : 0
    Num Stripes : 15628288
     Chunk Size : 32 KiB
       Reserved : 0
  Migrate State : idle
      Map State : normal
    Dirty State : clean
     RWH Policy : off
      Volume ID : 1

  Disk00 Serial : 31124S3051215884
          State : active
             Id : 00000001
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

  Disk02 Serial : 31124S3051211245
          State : active
             Id : 00000003
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)


$ sudo mdadm --examine /dev/sdd
/dev/sdd:
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.2.02
    Orig Family : 6cadbe34
         Family : 6cadbe34
     Generation : 00001091
  Creation Time : Unknown
     Attributes : All supported
           UUID : 1aec10af:6d9fa2b7:a3cccead:a6a84d7b
       Checksum : 8253e980 correct
    MPB Sectors : 2
          Disks : 3
   RAID Devices : 1

  Disk02 Serial : 31124S3051211245
          State : active
             Id : 00000003
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

[Alfred]:
       Subarray : 0
           UUID : 03717b04:a867aa6c:556ddc4d:cdfc1e9c
     RAID Level : 5
        Members : 3
          Slots : [UUU]
    Failed disk : none
      This Slot : 2
    Sector Size : 512
     Array Size : 2000420864 (953.88 GiB 1024.22 GB)
   Per Dev Size : 1000210696 (476.94 GiB 512.11 GB)
  Sector Offset : 0
    Num Stripes : 15628288
     Chunk Size : 32 KiB
       Reserved : 0
  Migrate State : idle
      Map State : normal
    Dirty State : clean
     RWH Policy : off
      Volume ID : 1

  Disk00 Serial : 31124S3051215884
          State : active
             Id : 00000001
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

  Disk01 Serial : 31124S3051211841
          State : active
             Id : 00000002
    Usable Size : 1000210432 (476.94 GiB 512.11 GB)

How can I assemble the array?

2

Is it already assembled?
what is the output of
cat /proc/mdstat
lsblk
ls /dev | grep d*

3 
  $ cat /proc/mdstat
Personalities : 
unused devices: <none>

  $ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda           8:0    0 447,1G  0 disk 
├─sda1        8:1    0   600M  0 part /boot/efi
├─sda2        8:2    0     1G  0 part /boot
└─sda3        8:3    0 445,5G  0 part /home
                                      /
sdb           8:16   0 476,9G  0 disk 
sdc           8:32   0 476,9G  0 disk 
sdd           8:48   0 476,9G  0 disk 
zram0       252:0    0     8G  0 disk [SWAP]
nvme0n1     259:0    0 931,5G  0 disk 
├─nvme0n1p1 259:1    0   931G  0 part 
└─nvme0n1p2 259:2    0   512M  0 part 

  $ ls /dev | grep d*
autofs
block
bsg
btrfs-control
bus
char
console
core
cpu
cpu_dma_latency
cuse
disk
dma_heap
dri
drm_dp_aux0
drm_dp_aux1
drm_dp_aux2
fd
full
fuse
gpiochip0
hidraw0
hidraw1
hidraw2
hidraw3
hidraw4
hidraw5
hidraw6
hidraw7
hpet
hugepages
hwrng
i2c-0
i2c-1
i2c-2
i2c-3
i2c-4
i2c-5
i2c-6
i2c-7
i2c-8
i2c-9
initctl
input
kfd
kmsg
kvm
log
loop-control
lp0
lp1
lp2
lp3
mapper
mcelog
mei0
mem
mqueue
mtd
mtd0
mtd0ro
net
ng0n1
null
nvme0
nvme0n1
nvme0n1p1
nvme0n1p2
nvram
port
ppp
ptmx
pts
random
rfkill
rtc
rtc0
sda
sda1
sda2
sda3
sdb
sdc
sdd
sg0
sg1
sg2
sg3
shm
snapshot
snd
stderr
stdin
stdout
tpm0
tpmrm0
tty
tty0
tty1
tty10
tty11
tty12
tty13
tty14
tty15
tty16
tty17
tty18
tty19
tty2
tty20
tty21
tty22
tty23
tty24
tty25
tty26
tty27
tty28
tty29
tty3
tty30
tty31
tty32
tty33
tty34
tty35
tty36
tty37
tty38
tty39
tty4
tty40
tty41
tty42
tty43
tty44
tty45
tty46
tty47
tty48
tty49
tty5
tty50
tty51
tty52
tty53
tty54
tty55
tty56
tty57
tty58
tty59
tty6
tty60
tty61
tty62
tty63
tty7
tty8
tty9
ttyS0
ttyS1
ttyS10
ttyS11
ttyS12
ttyS13
ttyS14
ttyS15
ttyS16
ttyS17
ttyS18
ttyS19
ttyS2
ttyS20
ttyS21
ttyS22
ttyS23
ttyS24
ttyS25
ttyS26
ttyS27
ttyS28
ttyS29
ttyS3
ttyS30
ttyS31
ttyS4
ttyS5
ttyS6
ttyS7
ttyS8
ttyS9
udmabuf
uhid
uinput
urandom
usb
usbmon0
usbmon1
usbmon2
userfaultfd
vcs
vcs1
vcs2
vcs3
vcs4
vcs5
vcs6
vcsa
vcsa1
vcsa2
vcsa3
vcsa4
vcsa5
vcsa6
vcsu
vcsu1
vcsu2
vcsu3
vcsu4
vcsu5
vcsu6
vfio
vga_arbiter
vhci
vhost-net
vhost-vsock
watchdog
watchdog0
zero
zram0
4

Does it work if you list the devices explicitly:

$ sudo mdadm --assemble /dev/md/Alfred /dev/sdb /dev/sdc /dev/sdd