Sunday, June 5, 2011

Re: [Simply Computers] SD Cards ReFormat

 

You could copy and paste it to a document file in either wordpad or notepad, or Word if you have it.

You could just leave the message in your mailbox and refer to it when you have time.

--- In simplycomputers2@yahoogroups.com, Vern Branch <branchvern26@...> wrote:
>
>  
> I am new to your group. The info. I read is very interesting, but how can I keep some of the info. for future reference. I do not want to copy on paper or fill my Yahoo move to file, to much. I would read and reread pluse research more on what you are talking about. when I have time.
> M.W.
>  
>  
>  
>
>
> --- On Sun, 6/5/11, David Ron <david.m.ron@...> wrote:
>
>
> From: David Ron <david.m.ron@...>
> Subject: Re: [Simply Computers] SD Cards ReFormat
> To: simplycomputers2@yahoogroups.com
> Date: Sunday, June 5, 2011, 1:30 AM
>
>
> I'm splitting hairs here... Format doesn't touch the MBR.  There is only
> one MBR per disk, but there may be several partitions on a disk - each
> of which may be formatted separately.  Formatting does the following:
>
>    1. The FAT <http://en.wikipedia.org/wiki/File_Allocation_Table>
>       entries are cleared by changing them to 0x00.
>    2. The root directory <http://en.wikipedia.org/wiki/Root_directory>
>       is cleared out by changing any values found to 0x00.
>    3. Format then checks each cluster
>       <http://en.wikipedia.org/wiki/Cluster_%28file_system%29> to see if
>       it is good or bad and marks it in the FAT.
>
> ( Source: http://en.wikipedia.org/wiki/Format_%28command%29 )
>
> The FAT (File Allocation Table), root directory, and all of the clusters
> are conceptually inside of the partition, while the MBR is outside of
> any partition.  Numbers 2 and 3 are optional, and are turned off when
> you do a "quick format".  Also, the "system" option will install a "boot
> volume record", is sometimes confused for the MBR, but it also exists
> inside of the partition and is not the MBR.
>
> If you want to change the MBR, you would need to use a partition
> management utility such as FDISK.  Many modern partition management
> utilities will both format and re-partition a disk, which may appear to
> affect the MBR during a format, but they are separate and distinct
> operations.
>
> --David
>
>
>
> On 06/04/2011 12:34 PM, Norm Higgs wrote:
> >
> > Formatting only writes to the MBR, not the entire drive.
> >
> > Norm Higgs
> > http://forbiddenpc.com
> > http://forbiddenpc.blogspot.com
> > http://www.power-blog.com/info/4365
> > http://freetrafficbar.com?r=74276
> >
> > On 2011-05-30 7:01 AM, tom wrote:
> > > I gather that it is not a good idea to defrag SD cards but what
> > happens every time you re format as I do when I finish downloading the
> > one in my camera? How long would it be expected to last?
> > > Tom
> > >
> > > --- In simplycomputers2@yahoogroups.com
> > <mailto:simplycomputers2%40yahoogroups.com>, David
> > Ron<david.m.ron@> wrote:
> > >> Not just that, but they would also have to write over the entire drive.
> > >> There is circuitry to spread write operations over the entire drive
> > so a
> > >> single file or folder can be rewritten far more times than that.
> > >>
> > >> - David
> > >> On May 26, 2011 11:11 AM, "Bill Aycock"<billaycock@> wrote:
> > >>> Why should we worry? To do this, one would have to write 55 times
> > a day,
> > >>> every day, for 5 years.
> > >>> Bill--W4BSG
> > >>>
> > >>> ----- Original Message -----
> > >>> From: "barry"<michiguru@>
> > >>> To:<simplycomputers2@yahoogroups.com
> > <mailto:simplycomputers2%40yahoogroups.com>>
> > >>> Sent: Thursday, May 26, 2011 11:09 AM
> > >>> Subject: [Simply Computers] SD Cards
> > >>>
> > >>>
> > >>>> Is it true that SD cards can only be written 100K times?
> > >>>>
> > >>>> Thanks.

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