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How to remove BIOS RAID metadata

Last Updated: Tue, Jan 8, 2013 12:26 AM

sometime, when you trying to install Linux on a used disk, it gave an error message:
"Disk contains BIOS metadata, but is not part of any recognized BIOS RAID sets. Ignoring disk sda”

To sold error try to erasing it:

# dmraid -r -E /dev/sda

If you get error you can:

# dd if=/dev/zero of=/dev/sda bs=512 count=2
# fdisk -s /dev/sda
#dd if=/dev/zero of=/dev/sda seek=(number_of_sectors – 20) bs=1k

number_of_sectors = output of fdisk -s /dev/sda

Repeat this step for all disk inside your server.

You can now install linux again.

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Comments (4) Comments
Comment By Hemanth - Fri, Oct 14th, 2016 10:56 PM
where do I type the commands you‘ve given??
Comment By QuiOui - Fri, Mar 20th, 2015 2:50 AM
Thanks! Finally managed to get CentOS to install after erasing those sectors.
Comment By yannis - Fri, Sep 13th, 2013 9:07 PM
Thank you very much !!!!!!!!!!I had no idea that I could erase just a few sectors at HDD start and end within seconds !!
Comment By m v lapeyre - Mon, Apr 1st, 2013 12:26 AM
Great tip, but others be warned this will break a windows MBR.. MS Win install doesn‘t care about the metadata and will just create a partition and install regardless. I didn‘t notice until I tried adding a Linux install.
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