Re: USB MicroSD card reader fails to mount

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On Sun, Apr 26, 2009 at 7:11 PM, g <geleem@xxxxxxxxxxxxx> wrote:
> Kam Leo wrote:
> On Tue, Apr 21, 2009 at 7:37 PM, Max Pyziur <pyz@xxxxxxxxx> wrote:
>>>
>>> Greetings,
>>>
>>> This evening when I installed my USB MicroSD reader into a USB port it
>>> failed to be mounted.
> <snip>
>>> Apr 21 23:12:54 brill kernel: usb 1-2: Product: Generic USB2.0 card
>>> Apr 21 23:12:54 brill kernel: usb 1-2: Manufacturer: Silicon Motion, Inc.
>>> Apr 21 23:12:54 brill kernel: usb 1-2: SerialNumber: 12345678901234567890
>>> Apr 21 23:12:59 brill kernel: scsi 11:0:0:0: Direct-Access     Generic USB
>>>  SD Reader   1.00 PQ: 0 ANSI: 0 CCS
> <snip>
>> What type of media did you put into the reader? Verify that your
>> reader is capable of reading SDHC media. Many are not.
>
> op states it is a microsd reader. log states it is an sd reader/
>
> why would it not be able to read an sd card?

FORMAT.  Like their standard sized SD and SDHC counterparts there are
micro-SD and  micro-SDHC cards. SD cards have up to 2 GB memory while
SDHC have capacities in the range of 4 - 32 GB.  Mechanical adapters
can enable micro cards to be plugged into SD readers, but the adapters
do not accommodate format changes. Contrary to what the SD Association
says about compatibility and interoperability older SD readers are not
able to interface with the higher capacity media. When you purchase a
reader or media you need to make sure that they are compatible.

Note: SDXC is coming out. I'm certain the majority of existing readers
will not be able to handle this new format.


> peace out.
>
> tc,hago.
>
> g
> .

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