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sorlow
4 Posts |
 Posted - 10 mars 2007 : 17:42:35
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I formatted my SD card with my mio and now it only has the capacity of 1gb(it says)??!! how can I change it back to 2gb?? |
Edited by - sorlow on 10 mars 2007 17:47:21
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metalcan
19 Posts |
Posted - 10 mars 2007 : 17:56:35
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| i dont have 2G SD card, but i heart someone try to use computer format SD card with FAT, not fat32. it maybe works. |
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sorlow
4 Posts |
Posted - 10 mars 2007 : 17:59:08
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| I've formatted too with my pc (card reader) but it remains the same capacity |
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sorlow
4 Posts |
Posted - 10 mars 2007 : 18:16:04
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nevermind, I just got it back to 2gb. thanks though.
I just booted my windows with the xp cdrom (like how you install xp) and there i was able to see the capacity of my sd card and just deleted the partition and made a new one of 2gb. |
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Amesdp
Canada
435 Posts |
Posted - 10 mars 2007 : 18:19:10
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Standard SD cards are supposed to be formatted with a FAT16 file system, according to the original definition of the SD consortium. Some systems and software may choose to ignore that definition, and allow you to format your removeable storage cards with FAT32 or NTFS, but there's no guarantee that it will be compatible with other SD card readers in general, and it usually isn't.
FAT16 as originally defined by Microsoft allows for a maximum 64K clusters, and a maximum cluster size of 32 Kbytes, resulting in a 2 Gbyte file system limit per drive (or partition). There are a couple of possible ways to extend this system without breaking it entirely, but only one has any chance of compatibility: WinNT extended the FAT16 definition slightly to allow the signed number of sectors per cluster (one byte) to be interpreted as an unsigned 8-bit number, thus gaining one extra bit and allowing up to 64 Kbytes per cluster, or max 4 Gbytes per drive or partition. Most, but not all, recent implementations of FAT16 support this extension. That's why 4 Gbyte SD cards are allowed, but may not work with everything.
Like every other memory card or file system design, the original SD card definition has now hit a capacity limit, and needs to be extended. The SD consortium has therefore come up with the SDHC (High Capacity) card specification, which allows FAT32 formatting. But SDHC cards formatted with FAT32 are not backward-compatible with earlier SD card readers. |
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problem with 2gb SD Card
