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thiesdiggity
Asked: 2012-03-02 08:59:18 +0800 CST

What should the total space be for 4 3TB Drives in RAID10 configuration?

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I just configured 4 3TB drives in a RAID-10 configuration but the total disk space in the RAID is 4TB. I used the following guide to setup the RAID-10, RAID-10 Intall. Shouldn't the size if the RAID-10 array be 6TB? According to this RAID Calculator it should be. Anyone have any idea of what might have gone wrong in the install?

Thanks in advance for your time.

hard-drive ubuntu disk-space-utilization raid

2 Answers

  1. Best Answer

    It should be 6tb... IF the raid controller of any sort can deal with more than 2tb per "partition". If it can not, then it will only use TB of the 3TB per disc.

    2TB is a limit for discs, so that could be it - depends how the disc is formatted (not the resulting partition) by the controller.

    http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/f795ba31-90b9-4d75-bed4-24ec703186ed/

    has a discussion about that, including some reasons for some controllers.

    It is possible the controller imposes sucha 2tb limit per disc.

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  2. What does fdisk -l report in terms of partitioning?

    What is the output from cat /proc/mdstat ?

    If you've mounted the md0 array, what does df -h report ?

    FYI the total available array space of 4x 3TB in RAID-10 is 5588 GB

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