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Yes its all about software, but I understood there was something fundamentally different about the way memorysticks work - I thought all the recent SE phones would take whatever size of memory card you threw at them.
Has anyone got personal 1st hand experience of a recent SE phone not accepting a large memory card?
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Posted: 2007-11-12 20:30:53
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I decided to ask Sony UK myself and sent in a support question. I specifically asked if the K850i supported the 8GB microSD card. They replied, "We can confirm that the Sony Ericsson K850i supports up to a 4GB MicroSD Memory Stick."
Take that as you will. Either they've not tested it with the 8GB card or they have tested it and the performance wasn't up to scratch so they don't recommend it. I have no idea. Judging by a few complaints I've seen regarding performance with the 8GB card I'd say that the K850i may not be up to utilising it properly from a performance perspective. Best to stick to 4GB cards. Ah well...
Cheers,
jahman
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Posted: 2007-11-15 12:26:10
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according to Sandisk the 4gb and 8gb M2 have exactly the same performance (Read/write: 10MB/sec read, 3MB/sec write) so why should the K850 have difficulty with the performance on the 8gb?
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Posted: 2007-11-15 12:38:41
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I don't know the technical details of reading microSD cards, however, I imagine it's perfectly possible that, for example, there are data structures which need traversing which are twice the size on 8GB cards compared to 4GB cards. If you have twice the amount of music it takes twice as long to index what's on the card which may mean unacceptably slow performance. The phone takes longer to traverse the card which means that it can't schedule other tasks in a timely manner which makes the phone less responsive. Lots of possibilities really.
I might ask them some further questions to illicit more information on the reasons why they don't recommend 8GB cards but I'm not sure how much info I'll get.
Cheers,
jahman
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Posted: 2007-11-15 14:37:01
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Hi jahman
It may take longer to index but that is surely due to their being more Data and surely it only needs to index once? So i really fail to see how that is in the long run going to be slower or more inconvienant than having to swap between two cards.
Marc
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[ This Message was edited by: Dogmann on 2007-11-15 13:41 ]
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Posted: 2007-11-15 14:41:09
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Its probable that the File Allocation Table (data structures?) will be bigger because there will be more clusters available on the larger media, but lets remember that this only impacts the writing of the files initially.
reading the files will have minimal impact because the FAT points to every cluster on the card and access is very quick (
I've read stories of impacted performance as larger cards come available but as someone who has always bought every larger size as they come available (I have an 8gb M2 and micro SDHC on their way even now) I can say I have not noticed any lag of any kind
I would suppose that if you have many many small files it could possibly have some impact or if you had very large cluster size but in general we tend to store 4-8mb music files and 100+mb movie files on these cards and perhaps 100 <1mb images so that all balances out in reality I think
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Posted: 2007-11-15 14:52:10
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Hi Dogmann,
Unfortunately, I have no idea how the size of the microSD card would affect the hardware or firmware architecture of the phone. However, as I said although perhaps I wasn't absolutely clear, dealing with twice the data maybe sufficient to reduce the performance of the phone, in terms of both its hardware and firmware, to make it much less performant and adversely impact the usability of the phone to such a degree that Sony advises against their use.
Sony won't want people ringing them up saying that their phone is crawling because of 8GB data cards. Instead, they advise no more than 4GB and if people want to try 8GB, they're on their own. It's probably fair enough.
8GB will work but will cause the phone to slow down under certain circumstances which will adversely affect the user experience so it's up to the user to decide whether this is a problem for them.
Cheers,
jahman
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Posted: 2007-11-15 15:25:09
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On 2007-11-15 15:25:09, jahman wrote:
Instead, they advise no more than 4GB and if people want to try 8GB, they're on their own. It's probably fair enough.
just to clarify, thats not what they said according to your earlier post.
You said that their response was that the K850 is compatible up to 4gb, which is difference from them advising not to use more than 4gb.
It has always been SE's way to only advise compatibility on what is currently available and I suspect that is all they are doing here as 8gb M2 and micro SDHC are only just starting to be available this month
When I get mine I'll certainly do some comparisons with my 4gb M2 and micro SDHC cards and I'll report back
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Posted: 2007-11-15 15:34:59
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crossmatched Posts: > 500
i agree with you masseur. when k750 was released in 2005, it was advertised that it can hold upto 1 gig of mspd (which is what is available back then) now 2gigs mspd and 4 gigs mspd are available. and these mspd's are perfectly compatible with k750.
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Posted: 2007-11-15 18:43:46
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On 2007-11-15 15:34:59, masseur wrote:
On 2007-11-15 15:25:09, jahman wrote:
Instead, they advise no more than 4GB and if people want to try 8GB, they're on their own. It's probably fair enough.
just to clarify, thats not what they said according to your earlier post.
Well, actually it is. They say it supports up to 4GB, i.e. the corollary is that iit does not support 8GB. Of course, we know that people have used 8GB microSD cards in the K850i but with not entirely satisfactory results.
I don't know why you think that's not what they said according to my earlier post but there you go. Perhaps you could explain further?
You said that their response was that the K850 is compatible up to 4gb, which is difference from them advising not to use more than 4gb.
They said it
supports up to 4GB which implies that as far as Sony is concerned
it does not support 8GB, i.e. they do not wish to support people attempting to use 8GB cards in the K850i.
It has always been SE's way to only advise compatibility on what is currently available and I suspect that is all they are doing here as 8gb M2 and micro SDHC are only just starting to be available this month
But the 8GB cards
are available and I specifically asked about them. The answer has come back stating that Sony only supports up to 4GB in the K850i.
When I get mine I'll certainly do some comparisons with my 4gb M2 and micro SDHC cards and I'll report back
I'll be interested to hear your experiences.
Regards,
jahman
[ This Message was edited by: jahman on 2007-11-15 18:10 ]
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Posted: 2007-11-15 19:09:15
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