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SDXC cards

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psgarcha92:
Hey Guys
is there anyone who has tried using a 68GB SDXC with sansa Fuze RockBox? or even the original OF?
i Read on wikipedia :

"SDHC and SDXC compatibility issues

In the 3.0 specification, the electronic interface of SDHC and SDXC cards is the same. This means that SDHC hosts which have drivers which recognize the newly used capability bits, and have operating system software which understands the exFAT filesystem, are compatible with SDXC cards. The decision to label cards with a capacity greater than 32GB as SDXC and to use a different filesystem is due solely to the limitations in creating larger filesystems in certain versions of Microsoft Windows. Other operating system kernels, such as Linux, make no distinction between SDHC and SDXC cards, as long as the card contains a compatible filesystem.

SDHC and SDXC cards and hosts have these compatibility issues:

    Existing SDHC hosts will only support the SDXC cards at up to UHS104 speeds;[36]
    SDXC hosts are backward compatible with SD and SDHC memory cards.[51]
    The operating systems that currently support SDXC are: Linux (with a proprietary driver for the exFAT filesystem[52]), Microsoft Windows 7, Windows Vista SP1+,[51] Windows XP SP2 or SP3 with KB955704,[53] Windows Server 2008 SP1+, Windows Server 2003 SP2 or SP3 with KB955704, Windows CE 6+, and Mac OS X Snow Leopard (Intel-based)[54]"

so are there any chances of implementing these cards in rockbox, though they require (i guess) exFAT Filesystems?

[Saint]:

--- Quote from: psgarcha92 on February 09, 2011, 07:21:07 AM ---so are there any chances of implementing these cards in rockbox, though they require (i guess) exFAT Filesystems?

--- End quote ---

If support for exFAT is indeed required, it's clearly a NoDo


[St.]

torne:
SDXC cards which use the 3.0 specification should hopefully work in Rockbox devices, though this has not been tested that I'm aware of. The later SDXC cards which are higher speeds are not backward compatible and will not work.

The specification suggests cards should be formatted as exFAT, and Windows will refuse to format devices over 32GB as FAT. We won't be able to read exFAT-formatted cards. There is, however, nothing stopping you from formatting a 64GB (or larger) SDXC 3.0 card as FAT32 using another operating system, and then it should work (including on Windows; it will happily read them, just not format them).

psgarcha92:
hey torne,
that means if the cards are formatted as FAT32, we might be able to use them on RockBox right?

why hasnt anybody tested 64GB SDXCs still?

torne:
I would guess nobody has one? :)

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