I am having a similar problem. When I try to install ClearOS 7.4.0.204729 on my Microserver Gen8 (with BIOS dated 6/2014 or something as I have failed trying to update the BIOS) following the online guide it asks for a biosboot partition and when I try doing that in RAID 1 the system won't boot but when I accept the automatic configuration of just installing it on sda it will boot but only if the first HDD is working so I don't have redundancy. Any ideas on how to fix this?

Thanks.

There is a test ISO that has some UEFI updates to it. Please try it and let me know how it works:

http://mirror.clearos.com/clearos/testing/daily_iso/ClearOS-DVD-x86_64-7.iso

Sorry; I was wrong; it won't let me do RAID 1 with biosboot and it is doing RAID 1 with /boot that seems to create the error. How important is it to have redundancy in these areas and how can I create it?

I tried installing with /boot as RAID 1, swap RAID 1, / RAID 5 and biosboot as default and it worked.

Thanks for the reply.

I'm pretty sure I am not using UEFI.

Is it the biosboot mount that can't be RAID 1? Is that the problem?

You may want to take a look at this: How to install Raid on big GPT disks while using UEFI booting Not sure if you are using UEFI or not, which the instruction above is primarily addressing.

In your setup, 20 GB for /boot seems like a waste of some 19 GB or so. Also, I would not recommend to have /boot on Raid 5 since a disk-failure will make booting a challenge in that case... Raid 1 is better for /boot and swap.

/Fred

Should I have made the /boot mount RAID 1?

So I did it again, this time selecting "Click here to create them automatically" then just changing the root mount point to RAID 5. Is this a good setup?

Thanks.