Originally Posted by Ashton
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Not true! The WM6 hacked roms give FULL read/write ability to SDHC, so it *IS* a driver issue with the axim (possibly with all SD readers, or it may be the Axim's is really SDHC-ready (i.e. SD version 1234, and SDHC is version 1235, so the hardware is identical) just so old that it wasn't stamped that) But proper drivers WILL enable SDHC support!
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I want to see benchmarks between those and an actual SDHC-based device to see if it works as intended (speed included), and I need to see more proof of those cards being filled to the 8GB or whatever they're specified for. Again, if it was JUST a driver issue, then MS could've shipped an SDHC driver for existing SD card readers and we'd be done with it - it's not like SD 1.1 cards can't be formatted to use FAT32; I did that with a 2GB SD card ages ago, and did the same for a 4GB SD 1.1 card from OCZ.
Again, SDHC is a standard that came about two or three years after the hardware for the Axim x50v shipped, and from what I've seen of the SD Association's whitesheets, there is some extra traffic-control stuff on there to allow it to write/read at those faster speeds. Just because SDHC readers are backwards compatible does NOT mean that SD readers are forward-compatible, any more than DVD drive that can read CD-ROMs means that a CD-ROM drive can read DVD's.
At this time, WM5 for the Axim will NOT support SDHC. There are SDHC-compatible products out there, but discussion about the ROM is expressly forbidden in the rules for the MobilitySite forums, and there is no official support for it. SD 1.1 4GB cards are still available, but your mileage may vary.