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How can I get my 100 GB of Hard Drive back & dual boot ubuntu ? Watch

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    Ok, so i was mid way into trying to dual boot my computer (currently with windows 7 ) with Ubuntu 10.10, i was trying to find a 100 GB of space and give it to Ubuntu. At that time my hard drive ( 500 GB) was partitions into approximately 250 GB called Acer with windows stuff, 250 GB with basically nothing on called Data and then two much smaller small partition. The plan was to reduce the size of DATA from approximately 250 GB to 150GB and then create a new partition with 100GB for ubundu. I selected the data partition and reduced its size by approximately 100 GB, but then my 100 GB appeared in the drive allocation (see below) as unusable, i booted back into windows to find that the data mdrive have been reduced successfully by 100 GB but now i can’t find my 100 GB of hard disk space. How can i get to back as a partition along sit Acer and Data and then how do i allocate this to Ubuntu ?
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    A partition needs to be formatted before it can be used by an operating system. Boot up from the CD, select install and go on until you get the 'specify partitions manually' option. If you double click the unallocated space (or maybe select it and click a button, not sure) there should be an option to format it. You'll want to set it as a primary partition formatted as ext4 with a mount point of "/" (a single forward slash, nothing else). If for some reason you can't format it while installing it should be possible in g-parted after booting to the live CD.
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    (Original post by somebody else)
    A partition needs to be formatted before it can be used by an operating system. Boot up from the CD, select install and go on until you get the 'specify partitions manually' option. If you double click the unallocated space (or maybe select it and click a button, not sure) there should be an option to format it. You'll want to set it as a primary partition formatted as ext4 with a mount point of "/" (a single forward slash, nothing else). If for some reason you can't format it while installing it should be possible in g-parted after booting to the live CD.
    Ok then so i tried what you suggested first to "If you double click the unallocated space (or maybe select it and click a button, not sure) there should be an option to format" but when i double clicked it nothing happened and the option to format just are not available so i then tried just g-parted and the format option still was not available then i then try it another way i got the message in the attached screen shot about having a maximum of 4 primary partitions ?? how can i correct this without losing any data ??
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    What's on /dev/sda4 (DATA)? Why not move all the data on that partition to /dev/sda3 (Acer), then delete /dev/sda4 and make a new larger partition including the unallocated space.
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    On the theme of what Jayem says..
    I would boot into windows, copy the data out of DATA.
    From Computer management I would then delete DATA ( doesn't seem much point "wasting" it as a primary.I would then install linux to the 100GB (no issue now as you would not exceed max. no. of primary partitions).
    Once done and working you can allocate the unused "DATA" partition as extended and create a logical drive in it..
 
 
 
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