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'[EE]: SDXC Memory Cards'
2009\01\08@225623 by Michael Algernon

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-- exFAT file system
       http://en.wikipedia.org/wiki/ExFAT
-- 2 TERABYTES OF STORAGE
-- accelerates SD interface read/write speeds to 104 megabytes per  
second this year, with a road map to 300 megabytes per second

http://www.sdcard.org/developers/tech/sdxc/

www.reghardware.co.uk/2009/01/07/ces_shxc_format_launched/
      The SDXC spec will be published later this quarter, and the SDA  
implied that existing specificiations, including SDIO and SDHC, would  
be updated to support the higher data throughput.


 WFT Electronics
Denver, CO   720 222 1309
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All ideas, text, drawings and audio , that are originated by WFT  
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2009\01\08@231915 by peter green

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Michael Algernon wrote:
> -- exFAT file system
>         http://en.wikipedia.org/wiki/ExFAT
>  
mmm, not supported on any windows version below vista, so unless either
card manufacturers ignore that part of the spec or reader manufacturers
supply thier own filesystem driver I could see this being an issue. I
don't think it's currently supported on linux either.

> -- 2 TERABYTES OF STORAGE
>  
Assuming that is the maximum supported it really doesn't seem that high,
hard drives are already there and SD cards are only a couple of orders
of magnitude off.

2009\01\09@003905 by M. Adam Davis

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On Thu, Jan 8, 2009 at 11:18 PM, peter green <spam_OUTplugwashTakeThisOuTspamp10link.net> wrote:
> Michael Algernon wrote:
>> -- exFAT file system
>>         http://en.wikipedia.org/wiki/ExFAT
>>
> mmm, not supported on any windows version below vista, so unless either
> card manufacturers ignore that part of the spec or reader manufacturers
> supply thier own filesystem driver I could see this being an issue. I
> don't think it's currently supported on linux either.

But that's just the file system.  Since it _should_ be a generic mass
storage device then you should be able to put FAT32 on it, which has
an upper limit of 8TB and is widely supported.  Further, some sources
indicate that Microsoft will release a driver for exFAT on XP shortly
after the release of Windows CE 6.0.  Others indicate that by copying
two driver files from a vista installation to an XP or 2003
installation exFAT will be recognized and usable.

>> -- 2 TERABYTES OF STORAGE
>>
> Assuming that is the maximum supported it really doesn't seem that high,
> hard drives are already there and SD cards are only a couple of orders
> of magnitude off.

Yeah, I'm surprised that they don't simply skip to the end and go for
64 bits to identify the block, and large block sizes.  It's more data
to transfer, but with burst and sequential read and write, I don't
think it adds that much overhead.

On the other hand, how the data cards are used changes so quickly that
I can understand them setting lower limits purposefully so that the
spec has to be updated regularly, and improvements can be
incorporated.

Still, 2TB is only 8 days of 24mbps HD recording...

-Adam

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2009\01\09@011624 by apptech

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> Still, 2TB is only 8 days of 24mbps HD recording...

Or under 100,000 RAW photo files from a (stupidly large file size) eg Sony
A900 DSLR.


            Russell

2009\01\09@112734 by M. Adam Davis

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On Fri, Jan 9, 2009 at 1:13 AM, apptech <.....apptechKILLspamspam@spam@paradise.net.nz> wrote:
>> Still, 2TB is only 8 days of 24mbps HD recording...
>
> Or under 100,000 RAW photo files from a (stupidly large file size) eg Sony
> A900 DSLR.


That's a lot of data to lose by misplacing somethign the size of a
stamp, or bending it badly (sitting on it, walking on it, etc)

-Adam


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