Repairing A Corruptted MMC.
Correct Treatment of your MMC:
Physically, memory cards are quite fragile pieces of high
technology, susceptible to damage from various silly
things like excessive heat, condensation, strong magnetic
fields, physical damage from rough handling and/or
bending! (similar to most electronic devices then..)
Given the natue of mobile memory card products, they are
constantly being taken in and out of some form of
interface with a mobile phone, a camera, a laptop, or
desktop PC, or a separate memory card reader. The number
of different devices they have to be able to interact with
is in the thousands.
It is not too surprisingly, then that sometimes the state
of the file system on the memory card can get damaged.
This may happen for a number of different reasons,
> removing the card from a device whilst an application is
trying to read/write to it.. (Just be patient...)
> battery drain on a device whilst in use meaning an
insufficent voltage failure whilst writing to the card.
> a poor implementation of the MMC standard on the device
using the card
> poor connectivity software drivers on the device or the
> physical damage like card or device being dropped, bent,
getting wet etc...
> lots of others i am sure..
As often as not, the problem is not terminal for your
memory card, but just a software issue ( or in physical
terms, it could be called "a temporary disalignment of the
all the bits and bytes on the card").
The fix for this problem is the same as for any other file
storage device (like a floppy or hard drive) with corrupt
or invalid file system, namely; re-format the file system.
Re-Formatting your MobyMemory MMC Card:
It is possible that your mobile will offer you the option
of formatting the memory card if it is found to be
invalid. (However, the likes of Nokia nGage, Nokia 6600,
and Siemens Sx1 often just prefer to reject the media as
In that case, to format the card, you will need access to
one or more of the following:
> A Windows PC or Mac.
> A separate multi-format memory card reader (verify that
it is compatible with the MultiMediaCard -MMC- standard).
> (This can come in USB or PCMCIA flavours. If USB, try
and ensutre it is a USB2 device.
> Alternatively, many of the newest laptop and desktop PCs
now come with integrated Multi-format memory card readers.
> If you are using a separate memory card reader, then
connect it up to your PC, and let windows recgnize the
device through plug-and-play.
Now you can insert your MobyMemory card into the
appropriate slot in the memory card reader. (Please note
that because the MMC card is pretty much symmetrical it is
very easy to insert it upside-down in the slot).
Open up [Windows Explorer] (or the equivalent for MAC
users..sorry not well-versed in OS X).
There should be at least one icon visible for a [Removable
Drive] in the list of available drives. (in fact, there is
often a list of about 5 or 6 Removable drives, one for
each of the different Memory card formats that your reader
is compatible with).
Find the drive that is mapped to the MMC card by clicking
on each in turn until it confirms there is a drive
present. (Sometimes it is easiest to do this by trying a
fully-functional MMC card in the MMC slot first so you can
confirm which drive letter it is.)
(NB. It will always be labelled as a [Removable Drive],
don't mistake it for one of your PC hard drives like [C:]
drive, as that could be catastrophic later on!)
At this stage it may give an error message saying that the
drive is unreadable.
By right-clicking on the drive letter, it will provide the
option of formatting the drive.
Select format the drive, and the [Format Drive] dialog
will appear (Double-check again to make sure it not your
There is only one setting to focus on in this page, and
that is to ensure that the FileSystem selected for
formatting is the [FAT] option (not FAT32, or NTFS or any
(Note: All mobile phones, to my knowledge, and most
cameras (etc..) use the FAT file system (or at least are
compatible with it) on their memory card media.)
Now click on Format Now ( ensure [Quick Format] is not
selected as this will not actually restore the file system
space byte by byte, but only resets the header information
so the drive thinks its empty again. This may not be
enought to solve your corruption problem.)
The PC will now - hopefully!- chug away happily until it
has restored the memory card space back to its original
configuration (of course, any information on there is long
gone by now!).
If you recieve an error message back from the [Format Now]
request, then your problem may be more permanent, and not
just a software issue. In this case, it may still respond
to a format request in a different memory card reader or
If you believe it to be a failure of manufacture, then the
warranty on the card offers the prospect of a replacement
card, subject to a confirmation of the fault upon return
of the goods.
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