LinuxQuestions.org - Mdadm can't find array on boot, but mounts manually on login

Hi,

First post here, and I hope someone can help me.

I've got a fresh install of Gentoo on a 2TB disk - sda - and then 4x 4TB disks - sd{f,g,h,i} - on which I've used mdadm to build a RAID6 array. This array is listed in my fstab to mount as /home.

On boot, I get an error notification:

Code:

mdadm: No arrays found in config file or automatically

Checking local filesystems ...

/dev/sda3: clean, 363490/111599616 files, 9038029/446369814 blocks

fsck.ext4: Unable to resolve 'UUID=0534d246-53df-4bf5-b03e-47200d9557dd'

followed by:

Code:

mount: /home: can't find UUID=0534d246-53df-4bf5-b03e-47200d9557dd

Some local filesystem failed to mount

Once I login, I see that it's failed to mount. That said, if I run 'mount -a' then it will mount fine.

mdadm --detail --scan shows the following:

Code:

ARRAY /dev/md/livecd:NydasCoreRaid1 metadata=1.2 name=livecd:NydasCoreRaid1 UUID=63fa5173:12b79cb4:e75da233:4986f28d

blkid /dev/md127 shows the following;

Code:

/dev/md127: LABEL="NydasCoreRaid1" UUID="0534d246-53df-4bf5-b03e-47200d9557dd" BLOCK_SIZE="4096" TYPE="ext4"

I generated an initramfs using the following:

Code:

genkernel --install --mdadm initramfs

Followed by:

Code:

grub-mkconfig -o /boot/grub/grub.cfg

So I *think* mdadm is running. I just can't get it to see the array. Oh, my /etc/mdadm.conf is completely hashed (#) out. However it says in the first line of the comments that it should run successfully without the file.

Your assistance would be really appreciated. First time I've used mdadm and first time I've used Gentoo. Hoping I haven't bitten off more than I can chew :-/

Andy