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K800i USB transfer speed |
Arne Anka
Joined: Nov 05, 2003
Posts: > 500
From: Sweden
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On 2006-07-06 19:00:44, avoid wrote:
So why use USB2 if the speed is the same as 1.1?
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Perhaps it has something to do with the mass storage capabilities ? |
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govigov
Joined: Jul 30, 2004
Posts: > 500
From: Back home - Cochin
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well i thot that with USB2.0 advantage you dont need to install the drivers to make software work.
with the K750i u need to install about 5 different drivers before the phone can start transfering stuff.
in K800 i guess its just plug it and there u get the drive.
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max_wedge
Joined: Aug 29, 2004
Posts: > 500
From: Australia
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no, there is a bit of a misunderstanding here. K750 and K800 are both usb 2.0 compatible. Neither support High Speed usb 2.0
K750 doesn't support mass storage unless drivers are installed (ie: it's not mass storage compliant out of the box). I'm not sure if K800 does or not.
The other drivers windows installs are nothing to do with mass storage. They are modem drivers, obex drivers etc.
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govigov
Joined: Jul 30, 2004
Posts: > 500
From: Back home - Cochin
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thats right, modem and obex drivers, but then again will it work with the mass storage drivers alone? you can do away with modem, but then again i guess obex should be present for the file transfer to happen. i dont think u need to instal drivers for the k800. not sure about it though.
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shyam335
Joined: May 25, 2004
Posts: > 500
From: 127.0.0.1
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On 2006-07-06 12:34:26, supermule2000 wrote:
Theres alot of confusion going on about USB 2.0. The speed for USB 2.0 is actually the same as USB 1.1 = 12 MBps! The 480 MBps is only for USB 2.0 HiSpeed! So if the K800i is equipped with USB 2.0 only then the highest possible speed would be close to 1 Mb/sec. Thinking about that this is a mobilephone where low power consumption is a must, i don't think that 300 Kb is that bad at all. If you need more speed then buy a cardreader - they are very cheap.
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I think you have mistaken B(yte) for b(it).
USB supports three transfer rates
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A Low Speed rate of 1.5 Mbit/s (183 KiB/s) that is mostly used for Human Interface Devices (HID) such as keyboards, mouse and joysticks.
A Full Speed rate (same as usb 1.1 speed) of 12 Mbit/s (1.4 MiB/s). Full Speed was the fastest rate before the USB 2.0 specification and many devices fall back to Full Speed. Full Speed devices divide the USB bandwidth between them in a first-come first-served basis and it is not uncommon to run out of bandwidth with several isochronous devices. All USB Hubs support Full Speed.
A Hi-Speed rate of 480 Mbit/s (57 MiB/s).
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kalleboo
Joined: Nov 03, 2005
Posts: 218
From: Lund, Sweden (walking distance
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Quote:
| On 2006-07-07 04:19:24, max_wedge wrote:
K750 doesn't support mass storage unless drivers are installed (ie: it's not mass storage compliant out of the box). |
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In Windows perhaps, but in MacOS X you just plug it in and it comes up as a Mass Storage drive right away with no intervening dialogs. |
shyam335
Joined: May 25, 2004
Posts: > 500
From: 127.0.0.1
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On 2006-07-07 04:00:10, govigov wrote:
well i thot that with USB2.0 advantage you dont need to install the drivers to make software work.
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As im aware there isnt anything like that. |
avoid
Joined: Jul 02, 2006
Posts: 7
From: Sweden
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On 2006-07-06 22:27:47, Brady wrote:
How are you checking the transfer rate?
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I copied a 144,9 MB file from my computer and used a timer. Then divided the file size by the seconds it took for the transfer. |
Blade Runner
Joined: Apr 05, 2003
Posts: 117
From: Belgrade
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And they aren't using old micro-controller's - they have simply elected not
to support USB 2.0 High Speed. This is to keep prices down.
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Are you joking me ?! This device costs nearly 500€, you can buy a decent
laptop for that money and we are talking here about technology years old,
not some hi-tech things that costs fortune, this is simple and very cheap
microcontroler but THEY decided to not include it because THEY want us to buy separate card reader and to just keep terorizing this awfull gum
thingy covering memory slot ... ah, those damn engineers ... or maybe
strategic planers ...
NHF, but sometimes they just have to listen to us and everything will be OK 
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max_wedge
Joined: Aug 29, 2004
Posts: > 500
From: Australia
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actually, they aren't trying to force us to buy card readers or cards.
M600 has full usb 2.0 high speed, which uses M2 memory (like K800). So IMHO the issue is cost, and now that it's getting cheaper they are including it in upcoming models.
It's one thing to say make a usb key that has high speed support - it doesn't have any purpose but to transfer data so you simply could not get away with making them without usb 2.0 high speed support. But for a phone with less than a gig of memory you can still sort of justify the lack of usb high speed support.
A manufacturer won't resist including higher performing hardware to "force" you to buy accessories. All that would achieve for the manufacturer is declining sales of their handsets and loss of market share. OEM's will keep their devices as modern as they can afford given what they percieve as the end user market.
I simply don't believe that SE will risk reduced marketshare at this stage by trying to force people to buy accessories by dumbing down their main product.
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max_wedge
Joined: Aug 29, 2004
Posts: > 500
From: Australia
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Quote:
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On 2006-07-07 08:12:34, kalleboo wrote:
In Windows perhaps, but in MacOS X you just plug it in and it comes up as a Mass Storage drive right away with no intervening dialogs.
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that's only because MAC OSX has the drivers built in. In due course Windows XP updates will include drivers also. Despite the fact Apple are on the ball, K750 still doesn't support mass storage natively.
A usb key will load drivers automatically on any windows xp system, that is the point of mass storage compliance. K750 doesn't do that.
If it did, Windows wouldn't need extra drivers
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[ This Message was edited by: max_wedge on 2006-07-08 00:30 ] |
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Posted: 2006-07-07 03:29
