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8Mb SD card only 6.44 Meg?


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Guest debully
Posted

Just formatted the storage card that came with the e200 - the one that says 8Mb on it....SP Task Manager still only reports 6.44M left.

I know there's some blurring of the edges when it comes to data storage but not over 1.5 meg surely?

TIA.

Guest cyrilthefish
Posted

thats about right i'm afraid :shock:

*Beware, probably dodgy maths ahead*

The first part of it is due to memory card manufacturers counting 1MB as being 1000kb not 1024kb. this means the actual physical storage available on a SD card is not 8192kb (8mb) but in fact 7812.5kb (~7.62MB)

A lot of the remaining 'missing' space will be taken up by the FAT file system itself.

i also remember reading somewhere (though i can't for the life of me remember where) that SD cards have a special secure area on the card for copy-protection and so on (which is why a MMC card has slightly more space than a SD card) which takes up up to 900kb if i remember correctly

Posted

plus some memory is used 4 the file system, like on HDDs, u lose about 8MB i think

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