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    840 evo 512gb, only granting 465gb space,..

    Discussion in 'Samsung' started by brakza, Aug 20, 2014.

  1. brakza

    brakza Notebook Enthusiast

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    Like the title say. My 840 evo 512gb only gives me 465gb space.

    PartitionWizard_465gb.png

    Is this correct? Seems a bit odd to me...

    B
     
    brakza, Aug 20, 2014
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  2. namaiki

    namaiki "basically rocks" Super Moderator

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    Sounds about correct for a 500GB hard drive (not 512GB). It might have some overprovisioning enabled.
     
    namaiki, Aug 20, 2014
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  3. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Samsung describe the EVO as 500GB although the memory chips will total 512GB. Some of the other Samsung SSDs are advertised as 512GB. I expect that difference is set aside for either (as noted already) for over-provisioning or memory management and being able to map some bad cells without loss of capacity.

    The difference between the advertised 500GB and the actual 465GB is the usual "loss" in translation between decimal MB (base 1000) and binary MB (base 1024). The advertised size uses decimal for ease of comparison with hard drives. However, this raises the point that since the SSD storage most probably has a binary structure then the underlying memory capacity should be the full 512GB and therefore the memory set aside is about 47GB (ie about 9%).

    John
     
    John Ratsey, Aug 21, 2014
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