Hi all,
after reboot I don't see anymore RAID5 composed by 3 disks.
This is my report:
Personalities :
md127 : inactive sdc1[3](S)
3906886468 blocks super 1.2
unused devices: <none>
/dev/mmcblk0: PTUUID="c5ac05a5" PTTYPE="dos"
/dev/mmcblk0p1: LABEL="boot" UUID="CE83-8CE1" TYPE="vfat" PARTUUID="c5ac05a5-01"
/dev/mmcblk0p2: UUID="2666ed46-1bb6-4ad7-ab5d-2ccde455c5e5" TYPE="ext4" PARTUUID="c5ac05a5-02"
/dev/mmcblk0p3: PARTUUID="c5ac05a5-03"
/dev/sdc1: UUID="8ea9547f-3a74-da29-87b4-6f6e1e4aa17e" UUID_SUB="467a3fc3-3df4-4f2d-377c-62a81da7RTUUID="35003986-b0a4-48f0-8d48-031554c5f602"
/dev/zram0: UUID="fa80a098-4f15-4c7c-96e4-74cd1bd5d870" TYPE="swap"
/dev/zram1: UUID="f2489ed5-a499-4fef-896f-c306b65ba805" TYPE="swap"
/dev/zram2: UUID="5f0f9b42-3b43-42c9-8d50-44077cd8293b" TYPE="swap"
/dev/zram3: UUID="f0554863-be69-4fc8-9a3e-9c0fcf8002be" TYPE="swap"
Disk /dev/ram0: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram1: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram2: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram3: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram4: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram5: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram6: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram7: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram8: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram9: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram10: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram11: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram12: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram13: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram14: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/ram15: 4 MiB, 4194304 bytes, 8192 sectors
Disk /dev/mmcblk0: 29.8 GiB, 32010928128 bytes, 62521344 sectors
Disk identifier: 0xc5ac05a5
Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 976754646 sectors
Disk /dev/sdb: 3.7 TiB, 4000787030016 bytes, 976754646 sectors
Disk /dev/sdc: 3.7 TiB, 4000787030016 bytes, 976754646 sectors
Disk identifier: 68CDF598-69D9-40F4-AA21-193B49D07C5D
Disk /dev/zram0: 115.8 MiB, 121384960 bytes, 29635 sectors
Disk /dev/zram1: 115.8 MiB, 121384960 bytes, 29635 sectors
Disk /dev/zram2: 115.8 MiB, 121384960 bytes, 29635 sectors
Disk /dev/zram3: 115.8 MiB, 121384960 bytes, 29635 sectors
# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#
# by default, scan all partitions (/proc/partitions) for MD superblocks.
# alternatively, specify devices to scan, using wildcards if desired.
# Note, if no DEVICE line is present, then "DEVICE partitions" is assumed.
# To avoid the auto-assembly of RAID devices a pattern that CAN'T match is
# used if no RAID devices are configured.
DEVICE partitions
# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes
# automatically tag new arrays as belonging to the local system
HOMEHOST <system>
# definitions of existing MD arrays
INACTIVE-ARRAY /dev/md127 num-devices=1 metadata=1.2 name=raspberrypi:NAS8Tb UUID=8ea9547f:3a74da29:87b46f6e:1e4aa17e
devices=/dev/sdc1
Thanks in advance to everyone wants help me.