Unable to create One Big RAID 10 prior than Centos ?
Okay here is the scenario, I can ofcourse create this after Centos gets installed, but I want to do it prior, I reckon the superblock can provide all the details and information for the OS.
Using Parted Magic this works 100% and the that OS created the RAID array and was able to see it and mount it correctly everytime.
However with Centos I load up the installer, I switch to terminal prior when I see the installer screen, and I can create successfully RAID devices with the mdadm tool, but Centos installer is not seeing it no matter what.
I was able to mount it under /mnt/raid 10, but I had to create that mountpoint manually, when I do normal mount command it states entry is not found it /etc/fstab and even If i created entry this is live OS session if I rebooted it wont be there ? Also under /mnt I dont see the 4 disks I recall seeing 2 folders system installer and another one.
the devices are under /dev/ folder. I see /dev/sda and /dev/sdb and /dev/sdc/ and /dev/sdd also /dev/md0 which is the RAID i created but it is not allowing me to install on it.
Logically am I doing something wrong trying to do the mdraid prior than the OS ?
The easy way out is install the O.S on its own disk (without RAID) then create RAID with the other drives, but this way I will need 5 storage disks and not 4.
The issue is basically when I go to the Centos installation and click on Disks it shows me the 4 disks separated.
This is not production environment, testing and learning Virtualbox
Thanks in advance.
Software RAID can never exist until the OS is loaded. So you always have to boot from a non-RAID partition that handled booting.
I think I got it working with Ubuntu LTS 16.04.2 currently installing the system will see how it goes, however it does make sense that OS needs to be in-charge of this.