defragment?

[bruno]

Archived from groups: microsoft.public.pocketpc (More info?)

On 28 Mar 2005 16:22:16 -0800, DW wrote:

>
>Nikki Casali wrote:
>> Your explanation makes it sound like the whole SD card is completely
>> rewritten, 1GB in total for example, even for a byte change.
>My understanding is, according to what the engineers tell me is
>the entire data on the device is re-written every time there is a save.
>
>So you get a defragmented saving every time it is written to the
>device, be it internal ROM, CF, and SD. It's the way the device saves
>the files in electronic memory.
>
>The engineers explain that cards like SD are not like the hard drive on
>your computer which need defragmenting.
>
>The source for this some enginers I know who worked companies like HP.

Right...

--
I'd rather have a bottle in front of me
than a frontal lobotomy.

 

[marc]

Archived from groups: microsoft.public.pocketpc (More info?)

Bruno wrote:
>>It may be pointless to defrag one memory card, but if you have a CF card
>>and a SD card it would be good to be able to defrag them as one drive,
>>so files were moved to different disks to maximize storage potional.
>
>
> I give up. Next topic please.


You don't understand what I've said do you?

Have you never had 2 memory cards in one device, with 3mb free on each -
and you want to fit a 6mb MP3 onto them somehow?

By re- arranging all the files on the memory cards it may be possible to
ensure that free 6mb is on one card, rather than across 2 of them.
Surely a tool that could do that would be useful?

--
Marc
See http/www.imarc.co.uk/ for contact details.

 

[Guest]

Archived from groups: microsoft.public.pocketpc (More info?)

"DW" <DrWoodardOnDS@hotmail.com> wrote:

>My understanding from the engineers is defragging is not necessary.
>
>Every time you write to the SD card the data on the card is written
>is re-written completely. So in essence your SD is defragged every
>time you write to it.

Even if the file is totally rewritten, it doesn't mean it is read,
deleted and written contiguously.

That said, as so many others have emphasized, so what? There are no
moving parts in an SD or CF card (microdrive's excluded) so there is
no need to defrag to reduce head movement. Head movement is what slows
down normal HD's. No heads, no moving parts, no impact by
fragmentation.


--
__________________________________________________________________________________
Ed Hansberry (Please do *NOT* email me. Post here for the benefit of all)
What is on my Pocket PC? http/www.ehansberry.com/
Microsoft MVP - Mobile Devices www.pocketpc.com
What is an MVP? - http/mvp.support.microsoft.com/

 

[Guest]

Archived from groups: microsoft.public.pocketpc (More info?)

DW wrote:

> Nikki Casali wrote:
>
>>Your explanation makes it sound like the whole SD card is completely
>>rewritten, 1GB in total for example, even for a byte change.
>
> My understanding is, according to what the engineers tell me is
> the entire data on the device is re-written every time there is a save.
>
> So you get a defragmented saving every time it is written to the
> device, be it internal ROM, CF, and SD. It's the way the device saves
> the files in electronic memory.
>
> The engineers explain that cards like SD are not like the hard drive on
> your computer which need defragmenting.
>
> The source for this some enginers I know who worked companies like HP.

The interface for reading and writing a hard drive is practically
identical to that for r/w a CF card. So I'm not sure what you are
referring to. The only thing that is rewritten is a sector, 512 bytes,
even when a single byte change is made. CF cards comply to ATA
specifications, the same that hard drives come under.

Nikki

 

[marc]

Archived from groups: microsoft.public.pocketpc (More info?)

Bruno wrote:


>> The engineers explain that cards like SD are not like the hard
>> drive on your computer which need defragmenting.
>>
>> The source for this some enginers I know who worked companies like
>> HP.
>
>
> Right...

I think maybe he means the data is constantly "refreshed" in some types
of memory, though I didn't think flash memory was like this.


--
Marc
See http/www.imarc.co.uk/ for contact details.

 

[Guest]

Archived from groups: microsoft.public.pocketpc (More info?)

Reply to message from Marc <see@signature.url> (Mon, 28 Mar 2005 15:42:51)
about "Re: defragment?":


M> Bruno wrote:
>>> It may be pointless to defrag one memory card, but if you have a CF
>>> card and a SD card it would be good to be able to defrag them as one
>>> drive, so files were moved to different disks to maximize storage
>>> potional.


>> I give up. Next topic please.


M> You don't understand what I've said do you?

M> Have you never had 2 memory cards in one device, with 3mb free on
M> each - and you want to fit a 6mb MP3 onto them somehow?

M> By re- arranging all the files on the memory cards it may be possible
M> to ensure that free 6mb is on one card, rather than across 2 of them.
M> Surely a tool that could do that would be useful?

It's called File Explorer, and it's built in. I use it all the time to move
files between the two cards on my iPaq.

JPinOH
Jon Porter <jporter@netwalk.com> Tue, 29 Mar 2005 01:13:49 -0400

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