1.    19 Oct 2015 #1
    Join Date : Oct 2015
    Posts : 238
    Windows 10

    Is it advisable to leave some of the hard disk space unallocated?


    Is it advisable to leave some of the hard disk space, say 1 GB or 2GB or ...... unallocated. Is there any benefit or harm.
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  2.    19 Oct 2015 #2
    Join Date : Jul 2015
    Posts : 9,132
    Windows 10 Pro

    I can't think of either a benefit or harm, unless your system partition is really short on free space.
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  3.    19 Oct 2015 #3
    Join Date : Jul 2015
    Posts : 3,652
    10 Pro

    Generally not but some file systems need it. For example OSX expects 128MB unallocated after all HFS partitions like this:

    Click image for larger version. 

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    There is a good explanation of partitioning here http://www.rodsbooks.com/gdisk/advice.html
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  4.    19 Oct 2015 #4
    Join Date : Jun 2015
    Ottawa, Canada
    Posts : 193
    Windows 10 Pro

    In a normal Windows system for home use I cannot think of a reason to leave unallocated space.
    Especially if it's an SSD drive where you need to make maximum use of all the space.
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  5.    19 Oct 2015 #5
    Join Date : Sep 2014
    Posts : 92
    64-bit 10240 10 Pro

    There is no reason to do so, no benefit whatsoever. No harm to do it but it is not a thing one should even consider.
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  6.    20 Oct 2015 #6
    Join Date : Jul 2015
    Posts : 267
    Windows 10

    Quote Originally Posted by Kanata View Post
    In a normal Windows system for home use I cannot think of a reason to leave unallocated space.
    Especially if it's an SSD drive where you need to make maximum use of all the space.
    Actually, in an SSD having some unallocated space can have some benefits. In fact most SSD's already have built-in unallocated space (OP – over provisioning). This allows the the SSD's internal systems greater efficiency in the Garbage Collection and trimming process. For example Samsung drives recommend a 10% over provisioning but allow users to exceed this limit. Furthermore, any time an SSD is filled to over 80% capacity you will see decrease in efficiency and speed. In traditional HD drives, unallocated space really serves no function.
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  7.    21 Oct 2015 #7
    Join Date : Oct 2015
    Posts : 238
    Windows 10
    Thread Starter

    Quote Originally Posted by NavyLCDR View Post
    I can't think of either a benefit or harm, unless your system partition is really short on free space.
    Thanks.
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  8.    21 Oct 2015 #8
    Join Date : Oct 2015
    Posts : 238
    Windows 10
    Thread Starter

    Thanks to all for their valuable information. As I do not have shortage of space and if there is no benefit and no harm that I would like to keep some GB unallocated. May be in future some software may need free space.
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