CentOS 7 cannot be installed on software RAID partitions

[thietkerem]

I currently have a CentOS 6.5 system using only software RAID (RAID 1) partitions.

I have kept a spare partition for the next operating system so I can install
and dual-boot it until all the software is working and I can make it the
production system.

The CentOS 7 installation GUI shows the physical disks but not the RAID
partitions (as did previous installers) so I have no way of installing it.

So some questions:

1) Am I doing anything wrong? I can't find any other GUI options.

2) If I installed on a plain partition and made it RAID (after installation)
would it even boot?

[hunter86_bg]

Most probably you have dmraid devices or md devices with old metadata.
Provide more details about your raids (for example - while running CentOS 6).

Still, you have the partitions available - so get a backup (I would prefer dd images of the 2 disks) and mark the 2 disks in the installer and select 'I will configure partitioning' /or something like that/ .
Then check if you see the old /boot . If not , you might have to destroy the old /boot and recreate it via CentOS 7 anakonda. Then you can create your "/" and select the VG details in order to set it to raid1 type.

[jlehtone]

I currently have a CentOS 6.5 system

Compulsory note:
The 6.5 was released in December 2013.
It has had no support whatsoever after 6.6 was released in October 2014.
The only CentOS 6 now is the 6.10.

Simple yum update converts 6.5 into 6.10 (in principle).