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Re: Maximum SD card capacity, what happens if you exceed it?

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Theo Markettos <theom+news@chiark.greenend.org.uk> wrote:
> Daniel James <daniel@me.invalid> wrote:
> > You've had most of the answer in dribs and drabs from others, but the 
> > to set it all out together in one place:
> > 
> > There are three SD card standards:
> > 
> > SD cards can be up to 2GB in size.
> > SDHC cards can be up to 32GB in size.
> > SDXC cards can be up to 2TB in size.
> 
> As I understand it:
> 
> The SD->SDHC transition is a protocol change: the initialisation sequence is
> different.  If this sequence is implemented in hardware or inaccessible
> firmware (such as in a USB-SD adaptor) then you can't upgrade a device to
> speaking SDHC.  If the sequence is implemented in software (eg an on-SoC
> SDHCI controller) then upgrading the OS might add support for SDHC.
> 
> The SDHC->SDXC transition is a disc format change: FAT32 goes to exFAT.
> If you reformat your card you can probably use it in a device that doesn't
> officially support SDXC.  FAT32 isn't even the limit: it's possible to
> format up to 2TB, just not with the Windows format tool.  The
> bigger problem with FAT32 is the 4GB file size, which is likely to be a
> problem for long videos.  ext3 might be another option.
> 
> (SDXC also supports a newer Secure Digital spec, but that should be
> backwards compatible with older readers)
> 
> TL;DR: try it and see, it may work.
> 
Yes, OP here, my searches turned up the above too.  I.e. that one may
be able to make a larger (64Gb, 128Gb) SD card work by reformatting it
to FAT32.  When my 64Gb SDs arrive I'll try it if they don't work 'as
is'.  I have Linux boxes I can format with.

-- 
Chris Green
·

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Maximum SD card capacity, what happens if you exceed it? Chris Green <cl@isbd.net> - 2016-08-17 23:15 +0100
  Re: Maximum SD card capacity, what happens if you exceed it? Ken Blake <Ken@invalid.news.com> - 2016-08-17 15:53 -0700
    Re: Maximum SD card capacity, what happens if you exceed it? crankypuss <undisclosedUserid@gmail.com> - 2016-08-18 08:56 -0600
      Re: Maximum SD card capacity, what happens if you exceed it? Poutnik <poutnik4nntp@gmail.com> - 2016-08-18 19:01 +0200
  Re: Maximum SD card capacity, what happens if you exceed it? AL <noemail@none.com> - 2016-08-17 16:14 -0700
    Re: Maximum SD card capacity, what happens if you exceed it? AL <noemail@none.com> - 2016-08-17 16:31 -0700
  Re: Maximum SD card capacity, what happens if you exceed it? tlvp <mPiOsUcB.EtLlLvEp@att.net> - 2016-08-17 22:21 -0400
    Re: Maximum SD card capacity, what happens if you exceed it? Poutnik <poutnik4nntp@gmail.com> - 2016-08-18 07:38 +0200
      Re: Maximum SD card capacity, what happens if you exceed it? Chris <ithinkiam@gmail.com> - 2016-08-18 07:22 +0000
  Re: Maximum SD card capacity, what happens if you exceed it? crankypuss <undisclosedUserid@gmail.com> - 2016-08-18 08:55 -0600
  Re: Maximum SD card capacity, what happens if you exceed it? Daniel James <daniel@me.invalid> - 2016-08-19 15:20 +0100
    Re: Maximum SD card capacity, what happens if you exceed it? musika <mUs1Ka@NOSPAMexcite.com> - 2016-08-19 15:36 +0100
      Re: Maximum SD card capacity, what happens if you exceed it? Daniel James <daniel@me.invalid> - 2016-08-20 15:52 +0100
        Re: Maximum SD card capacity, what happens if you exceed it? Dave Higton <dave@davehigton.me.uk> - 2016-08-20 19:15 +0100
          Re: Maximum SD card capacity, what happens if you exceed it? Daniel James <daniel@me.invalid> - 2016-08-27 17:49 +0100
            Re: Maximum SD card capacity, what happens if you exceed it? Dave Higton <dave@davehigton.me.uk> - 2016-08-27 20:40 +0100
              Re: Maximum SD card capacity, what happens if you exceed it? Daniel James <daniel@me.invalid> - 2016-08-28 14:54 +0100
    Re: Maximum SD card capacity, what happens if you exceed it? AL <noemail@none.com> - 2016-08-19 08:11 -0700
    Re: Maximum SD card capacity, what happens if you exceed it? Theo Markettos <theom+news@chiark.greenend.org.uk> - 2016-08-20 23:32 +0100
      Re: Maximum SD card capacity, what happens if you exceed it? Chris Green <cl@isbd.net> - 2016-08-21 10:28 +0100
  Re: Maximum SD card capacity, what happens if you exceed it? Micky <NONONObobbyburns1111@gmail.com> - 2016-08-20 07:02 -0400
    Re: Maximum SD card capacity, what happens if you exceed it? Micky <NONONObobbyburns1111@gmail.com> - 2016-08-20 07:12 -0400
    Re: Maximum SD card capacity, what happens if you exceed it? Nigel Wade <nmw@local.domain> - 2016-08-22 09:55 +0100
      Re: Maximum SD card capacity, what happens if you exceed it? Micky <NONONObobbyburns1111@gmail.com> - 2016-08-22 11:15 -0400

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