I'm not sure what else to check. Everything below looks sane to me but the system hangs on boot. This is a home server with four disks crammed into a Dell OP620. Each pair of disks are assembled as RAID1: /
and data
. The failed array is /
, hence the inability to boot.
The full error, which repeats indefinitely on the console, is:
incrementally starting raid arrays
mdadm: Create user root not found
mdadm: create group disk not found
incrementally started raid arrays
A similar screenshot is available here. This system was running fine until the last restart. The array assembles fine from a Puppy Linux rescue USB:
mdadm --assemble --scan
fdiisk
shows the available disks:
# fdisk -l|grep GB
Disk /dev/sda: 320.1 GB, 320072933376 bytes
Disk /dev/sdb: 320.1 GB, 320072933376 bytes
Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes
Disk /dev/sdd: 3000.6 GB, 3000592982016 bytes
Disk /dev/md127: 3000.5 GB, 3000457494528 bytes
Disk /dev/md126: 317.9 GB, 317938532352 bytes
Followed by blkid
displaying UUIDs:
# blkid
/dev/md126: UUID="fc836940-3c99-4f64-8751-decc9629abc5" TYPE="ext4"
/dev/md0: UUID="2b00d6da-aa0e-4295-a1bb-822f4224815b" TYPE="swap"
/dev/loop0: TYPE="squashfs"
/dev/sda1: UUID="908ccc1f-cb70-4d3e-9d81-43b8e0f519ff" TYPE="ext4"
/dev/sdb1: UUID="3a052c52-593f-47d5-8606-cb818619c50b" TYPE="ext4"
/dev/sde1: LABEL="8GB_BLACK_P" UUID="1CE1-AF11" TYPE="vfat"
and I can mount the md126
device with:
mount /dev/md126 /mnt/tmp
My (previously working) fstab file is:
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/md1 during installation
UUID=fc836940-3c99-4f64-8751-decc9629abc5 / ext4 errors=remount-ro 0 1
# swap was on /dev/md0 during installation
UUID=2b00d6da-aa0e-4295-a1bb-822f4224815b none swap sw 0 0
/dev/mapper/3TB_RAID--1--LVM-lvol0 /data ext4 nosuid,auto 0 0