Unable to Install Centos 7.7.1908 with RAID1 on 400GB SSDs: "sdb may not have enough space for grub 2 to embed core.img"

[keennay]

sdb may not have enough space for grub 2 to embed core.img when using the xfs file system on mdarray

The above is the error I receive when attempting to install Centos 7.7.1908 from a USB drive (BIOS boot) onto two 400GB SAS SSDs and configure the boot, root, and swap directories as RAID1. The target device is a Dell PowerEdge 720 at my physical location.

I however do not see this problem when attempting to install on 1.92TB SSDs laying around, though I only have a few of those and more of the 400GB SSDs. At first I thought this was a problem with my disk capacity, but here's a YouTube video where the uploader had no issues setting up the OS in a RAID 1 setup with 20GB drives:

https://youtu.be/NaLDbO4DZ30

Here is my screenshot:



Thanks

[TrevorH]

Are these attached to a hardware RAID controller? What mode is the machine in? Legacy BIOS or UEFI? How did you create the USB stick? Did you verify the sha256sum of the iso image that you downloaded against the list in our release notes?

[keennay]

Are these attached to a hardware RAID controller? What mode is the machine in? Legacy BIOS or UEFI? How did you create the USB stick? Did you verify the sha256sum of the iso image that you downloaded against the list in our release notes?

Hey,

I've solved this, thanks. I wasn't aware that my server included a SAS RAID controller, so everything was just done there.