CentOS 7 And Software Raid Minimal Install

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I am trying to install CentOS 7 on a couple 4TB drives with software raid. In the Supermicro bios I set UEFI/BIOS boot mode to legacy. I
am using the CentOS 7 minimal install ISO flashed to a USB thumb drive.

So I do custom drive layout something like this using sda and sdb.

Create /boot as 512 MB XFS raid1 array.

Create SWAP as 32 GB SWAP raid1 array.

Create / on 3.xxx TB XFS raid1 array.

I then get error.

“Your BIOS-based system needs a special partition to boot from a GPT
disk label. To countinue, please create a 1MiB ‘biosboot’ type partition.”

I cannot seem to create the biosboot partition so it is mirrored to both drives for redundancy. Any ideas how to do this? I want everything mirrored to both drives.

4 thoughts on - CentOS 7 And Software Raid Minimal Install

  • Matt wrote:

    Yeah, you need to create the 1M partition, preferably the first, and its type, like ext4 or xfs or swap, is, in the dropdown, biosboot.

    mark

  • Matt wrote:

    Using software RAID? Build one drive, then add in the other. You do give RAID the whole drive….

    mark

  • This is the relevant part of a kickstart of a raid1 setup I have used 2 weeks ago for a 3 members RAID1 on 6 TB hard disks (legacy boot, no UEFI).


    clearpart –all –drives=sda,sdb,sdc –initlabel

    #initial setup only
    #—————-