3 Replies Latest reply on Apr 21, 2015 11:28 AM by joe_intel

    [Chipset HM87] mdadm: platform does not support raid1 on 2 disks

    blausand

      The product specification for Intel's Chipset HM87

      https://www-ssl.intel.com/content/www/us/en/chipsets/performance-chipsets/mobile-chipset-hm87.html?wapkw=hm87

      states, that it is fully capable of Intel RST, and thus RAID levels 0,1,5,10.

       

      Ramu Ramakesavan and Patrick Thomson publish this white paper about Intel RST under Linux:

      http://www.intel.se/content/dam/www/public/us/en/documents/white-papers/rst-linux-paper.pdf

      It states, that for Intel RST, RAID1 is well possible with 2 drives. And it tells how to set that up with mdadm

       

      I manage to create the container using

      # mdadm C /dev/md/imsm /dev/sd[a-b] –n 2 e imsm

      When i setup the specific mirror RAID set i receive the following error:

      # mdadm C /dev/md/mirror /dev/md/imsm –n 2 –l 1 c 16 –z $((250*1024*1024))

      mdadm: platform does not support raid1 on 2 disks

       

       

      Why is that?