gistfile1.txt

How to install Manjaro on a raid 0 array with EFI

Create a 100 MiB FAT32 partition with Gparted, name the label ESP, apply operations and give it boot and esp flags
Create a swap partition with gparted and give it the label swap

# cfdisk /dev/sdb

Create a swap type partition and give it a Linux RAID type for each disk
sudo mdadm --create /dev/md0 --level=0 --metadata=1.2 --chunk=64 --raid-devices=2 /dev/sdb1 /dev/sdc1

# mkfs.ext4 -v -L myarray -m 0.5 -b 4096 -E stride=16,stripe-width=32 /dev/md0

Stride = (chunk size/block size). In this example, the math is (64/4) so the stride = 16.

Stripe-width = (# of physical data disks * stride). In this example, the math is (2*16) so the stripe-width = 32.

Run Calamares and go though the installation process until you get to disk partitioning

Select "Manual partitioning"

Select /dev/md0 under Linux Software RAID Array and click Edit and make the Mount Point / 

Select the FAT32 ESP partition under the other drive and make the mount point /boot/efi

Select the swap partition and click format

Go next and continue the rest of the installation

After the installation

# mdadm --detail --scan

example: ARRAY /dev/md0 metadata=1.2 name=manjaro:0 UUID=2402538e:c1a5d525:56a39724:3712e56c

place this in /etc/mdadm.conf under the line DEVICE partitions and get rid of metadata and name

# nano /etc/mdadm.conf

# mount /dev/md0 /mnt

# cp /etc/mdadm.conf /mnt/etc/mdadm.conf

# for f in proc sys dev ; do mount --bind /$f /mnt/$f ; done

# chroot /mnt

# nano /etc/mkinitcpio.conf

add mdadm_udev to the HOOKS array in /etc/mkinitcpio.conf

for example: HOOKS="base udev autodetect block mdadm_udev filesystems usbinput fsck"

# mkinitcpio -p linux44

Regenerate the initramfs image

Reboot and enjoy raid 0

Infomation 

https://erikugel.wordpress.com/2010/04/11/setting-up-linux-with-raid-faster-slackware-with-mdadm-and-xfs/
https://wiki.archlinux.org/index.php/RAID
https://wiki.archlinux.org/index.php/mkinitcpio#Using_RAID