I attempted to install CentOS 7 x86_64 on my machine that has the following hardware:
Motherboard: ASRock X99 Taichi BIOS: AMI v P1.40 08/04/2016 CPU: Intel Core I7-5820K RAM: 64 GB (8 x 8 GB DIMM) Optical: LG Blu Ray 25 G / 50 G burner Storage: 2 - 120GB PNY CS1311 SSD 4 - 4 TB Western Digital hard drives The 2 SSD drives are divided into 3 software RAID-1 devices: /dev/sda1 | /dev/sdb1 = /dev/md0 (2 GB) /dev/md0 /boot /dev/sda2 | /dev/sdb2 = /dev/md1 (77 GB) LVM /dev/VG_opsys /dev/vg_opsys/lv_root / 8 GB /dev/vg_opsys/lv_archive /archive 2 GB /dev/vg_opsys/lv_opt /opt 2 GB /dev/vg_opsys/lv_tmp /tmp 5 GB /dev/vg_opsys/lv_usr /usr 12 GB /dev/vg_opsys/lv_usr_local /usr/local 2 GB /dev/vg_opsys/lv_var /var 8 GB /dev/sda3 | /dev/sdb3 = /dev/md2 (32 GB) LVM /dev/vg_sysswap /dev/vg_sysswap/lv_sysswap swap 16 GB 4 - 4 TB Western Digital hard drives The 4 WD drives are divided into a single software RAID-10 device: /sdc1 | /sdd1 | /sde1 | /sdf1 = /dev/md3 (7.28 TB) LVM /dev/vg_jpd1data /dev/vg_jpd1data/lv_dbmsu00 /dbmsu00 160 GB /dev/vg_jpd1data/lv_websoft /websoft 70 GB ... ETC ...
I like this configuration so I thought ...
Installation attempt 1: Machine had been running CentOS 6.10 x86_64 with no problems at all. But I wanted to do some things on this machine and I didn't want to have to do a upgrade next year. I backed up all of the data on another machine so I wouldn't suffer a data loss. Inserted the CentOS 7 DVD and rebooted - for whatever reason it didn't see the DVD.
Installation attempt 2: Rebooted and selected F11 for the boot menu and selected the SATA device for the Blu Ray (BTW, there was another selection that allowed me to boot UEFI for the Blu Ray). The installation continued and when I got the the storage screen I selected all 6 storage devices. When I got to the point where I tried to select all of the file systems (BTW, the /boot device was listed as unknown) I wanted format the volumes /boot, OpSys, and swap and I wanted to just mount the devices defined on the RAID-10 device. When I tried to accept the definitions the install just hung at the point. I had to power off the machine.
One thing you could try is looking at the different virtual consoles where you can see what the installer is doing. Just press Alt&Ctrl&F1(-6) to see them. You should see there where it hangs.
Regards, Simon