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Thread: Error Create Raid Array

  1. #1
    Join Date
    Jan 2011
    Beans
    30

    Error Create Raid Array

    I am using the gui "Disk Utility". It looks simple enough. Disk Utility shows the 3 2TB drives I want to build into 1 Raid 5 disk. However, when I go to FILE | CREATE RAID and am presented with all the drives, the 3 drives are grayed out and the message says "no free space". I have attempted to format the drive, format the partion, delete the partions, mount, unmount. But in the end, I get Error Creating Raid Array. Looks so easy to use the disk utility gui and get this setup. What am I missing? Wrong format for the drives? What?

  2. #2
    Join Date
    Jan 2013
    Beans
    1

    Re: Error Create Raid Array

    I was having similar issues and the only way I could proceed was to delete all existing partitions and let Disk Utility create one. But the partition that Disk Utility created was giving WARNING: The partition is misaligned by xxx bytes messages similar to the one described at http://askubuntu.com/questions/30071...-i-repartition

    You can still create RAID using mdadm command line utility as described here. However, if you need a GUI, the only other option I could find is Webmin. I tried it and I'm very happy; see Using Webmin for Linux RAID. I don't know why Webmin is not concluded in the standard Ubuntu or CentOS distribution, but it has RPM and Debian packages available.

    Hope this helps.

  3. #3
    Join Date
    Jan 2011
    Beans
    30

    Re: Error Create Raid Array

    Thanks, sarkiss, for the tip. I may give webmin a try, especially since it might notify me of raid issues...hadn't been able to figure that out using mdadm.

    Since my original issue, I have learned how to use mdadm. It wasn't that difficult, it is just when I first started considering RAID, it seemed like a gui like "Disk Utility" would work. "Disk Utility" was just too problematic and I switched.

  4. #4
    Join Date
    Jul 2010
    Location
    Michigan, USA
    Beans
    2,123
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Error Create Raid Array

    Quote Originally Posted by F35 View Post
    Thanks, sarkiss, for the tip. I may give webmin a try, especially since it might notify me of raid issues...hadn't been able to figure that out using mdadm.

    Since my original issue, I have learned how to use mdadm. It wasn't that difficult, it is just when I first started considering RAID, it seemed like a gui like "Disk Utility" would work. "Disk Utility" was just too problematic and I switched.
    If you don't mind using the command line, mdadm can easily be setup from partitioning (properly aligned), to mdadm, to SMART alerting, setting up a UPS, and spinning down idle disks. I have all of these topics covered on my site.

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