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Memory Stick FAQ |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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On 2007-05-25 04:24:05, hanugro wrote:
Anyway I also think they must improve read/write speed as well. It is not funny to wait for almost 3 hr to fill up your 32GB M2 (at 3MBps).
M2 speed is 160Mbits (20MBps). 3MBps is DCU-60 cable speed, a card reader is fully USB2 compliant, so you will get the full 160Mbits transfer speed of M2. That's less than half an hour for 32GB, not so bad. Besides, they are likely to increase the speed of M2 before it reaches 32GB (the speed can usually be increased without changing the architecture) 
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iroel97
Joined: May 26, 2007
Posts: 6
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I got my sandisk 512 MS pro duo together with the adapter last year for my sony dsc m2 camera. Now, the adapter couldn't work normally. 2 weeks ago I bought Sony 1gb M2 for my K800i. It bundled with 2 adapters one for MS pro duo and the other for MS Pro. I quite satisfied with the performance of my Sony 1 GB M2, it is working well. I think I'll go for Sony. |
hanugro
Joined: Feb 28, 2005
Posts: > 500
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On 2007-05-29 01:26:29, max_wedge wrote:
On 2007-05-25 04:24:05, hanugro wrote:
Anyway I also think they must improve read/write speed as well. It is not funny to wait for almost 3 hr to fill up your 32GB M2 (at 3MBps).
M2 speed is 160Mbits (20MBps). 3MBps is DCU-60 cable speed, a card reader is fully USB2 compliant, so you will get the full 160Mbits transfer speed of M2. That's less than half an hour for 32GB, not so bad. Besides, they are likely to increase the speed of M2 before it reaches 32GB (the speed can usually be increased without changing the architecture)
Mm, last time I check it is 10MBps read and 3MBps write for M2. Are you sure you are not confusing it with MSPro Duo spec? If my memory serve me right it is posted in Sandisk website. Probably Sony brand is faster which I doubt since they are likely to buy OEM from Sandisk anyway.
Edit: It's clearly written here: http://www.sandisk.com/Products/ProductInfo.aspx?ID=2177
[ This Message was edited by: hanugro on 2007-06-01 02:21 ] |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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http://en.wikipedia.org/wiki/Memory_Stick#Transfer_speeds (M2 - 160MBit/s)
http://uk.shopping.com/xPO-Sony-M2 (minimum write 15MB/s)
http://www.mittoni.com.au/san[....]ory-stick-micro-m2-p-2360.html
I very much doubt M2 will be slower than existing memory sticks, and as the links above show, they are just as fast as MS Pro. Infact M2 cards are fully compatible with the MS Pro standard, both in speed and theoretical maximum capacity.
3MB/s is stupidly slow for a memory card.
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hanugro
Joined: Feb 28, 2005
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On 2007-06-01 12:53:22, max_wedge wrote:
I very much doubt M2 will be slower than existing memory sticks, and as the links above show, they are just as fast as MS Pro. Infact M2 cards are fully compatible with the MS Pro standard, both in speed and theoretical maximum capacity.
3MB/s is stupidly slow for a memory card.
Well since I quote directly from manufacturer website then it is safe to say that 3MBps is (perhaps?) minimum write speed of all M2 from Sandisk. I use Sandisk USB 2.0 8in1 device (using MS adapter) and 2.0 USB and it pretty much confirm Sandisk speed (I fill 800MB around 20+min around 3-4MBps). My experince using K800 and DCU-60 cable is worse than that. Seems that K800 is not as optimized as my wife Z610 for USB transfer.
Now is there any literature from Sony about the real speed of their M2 card. Actually 3MBps is about 20x which is quite normal (not that slow for 1-2GB capacity but seriously lacking for 32GB one). I am pretty much satisfied with my M2 card for daily use (I got no delay when reading something from it in my phone or when transfering/write a java game/apps or a picture). Other than trying to fill it in one transfer then it is OK.
Only pro memory flash had speed in excess of 266x (Extreme IV) which is about 40MBps (but stll not sustained speed). The Lexar new (coming soon)UDMA is rated at 300x and 45MBps sustained speed.
Edit: well you said it already, theoretical speed which is ussually way faster than what you get in reality.
Also here is joint press release of Sandisk and Sony co-developing M2 and should make it clear that Sandisk is a good brand. They can be cheaper than Sony maybe because even Sony buy from Sandisk and relabel to Sony.
http://www.sony-europe.com/re[....]ment/file/67/1123689954967.pdf
[ This Message was edited by: hanugro on 2007-06-02 03:17 ] |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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The M2 conforms to the MS Pro specification. So it's speeds should be the same. In due course no doubt they will bring out high speed M2 cards (if not already), but for now they should perform atleast as good as standard MSDP.
I did some transfer tests on MSDP and USB2 card reader:
258MB movie file
Write: 49 seconds (5.3MB/s)
Read: 20 seconds (12.5MB/s)
258MB of music files
Write: 62 seconds (4.2MB/s)
Read: 24 seconds (11MB/s)
So yeah, it is way slower than theoretical, but still 50-75% faster than what sandisk claim for writing, and 10-25% faster on reading.
RE: DCU-60, I got my decimal places confused 
DCU-60
Write - 0.3MB/s
Read - 0.4MB/s
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KingBooker5
Joined: May 12, 2007
Posts: > 500
From: London, England
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Does any one here know when the 4gb micro will be out? And how much will it cost? |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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On 2007-06-02 11:35:34, KingBooker5 wrote:
Does any one here know when the 4gb micro will be out? And how much will it cost?
Don't know, but M2 2GB in Australia is slightly cheaper than MSDP 2GB. MSDP 4GB is AUD200.
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hanugro
Joined: Feb 28, 2005
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On 2007-06-02 10:20:13, max_wedge wrote:
So yeah, it is way slower than theoretical, but still 50-75% faster than what sandisk claim for writing, and 10-25% faster on reading.
RE: DCU-60, I got my decimal places confused
DCU-60
Write - 0.3MB/s
Read - 0.4MB/s
Yeah the USB cable sucks. My bluetooth 2.0 dongle can transfer twice as fast as the USB cable to my K800. However the Z610 is definitely faster than K800 when using the DCU-60, so I guess it is up to the phone as well.
Edit: sorry that 20min+ is using DCU-60 cables. Using Sandisk 8in1 require few minutes to write 800MB.
[ This Message was edited by: hanugro on 2007-06-02 11:57 ] |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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My K750 also runs DCU-60 faster than bluetooth - it seems K800 has dropped the ball on DCU-60 speed? Disappointing...
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HellDemon
Joined: Jul 10, 2007
Posts: 31
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Does anyone here actually HAVE a 4gb M2? I plan on buying one, but I first want to know how much slower it would take to browse through tracks and whatnot on a phone like the S500 (the one I'm soon going to get in a few days).
If it's too slow then I don't think I can bear with it... As much as I need a 4gb M2, I'd rather not hinder that beautiful phone and use a 2gb M2 instead...
I've stood by my w900i's terrible lagginess long enough; i.e. Sandisk 4gb Ultra II Memory Stick Pro Duo, but even the increased speed from the Ultra II series didn't really do much.
Which is why I'm deciding to change from a w900i to an s500i. It's basically an even match between the two; w900i beats it in features, built in memory, AF+F CAMERA, 3g, and 3d acceleration, but the s500i has a better design, thinner, lighter, faster and smoother UI, walkman 1.4, and even smoother & faster gameplay & applications due to the fact that the s500 and a majority of all recent ericsson phones are able to run faster and more efficiently. |
Nickp990
Joined: May 29, 2007
Posts: > 500
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grate tips thanks! |
BLKSNAKER
Joined: Apr 22, 2006
Posts: 149
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I recently bought a fake 4GB MS Pro Duo "Sony". My question is if the original 4gb ms pro duo sony are Hot Swap, and what is the read and write speed of the original ms pro duo 4gb. I have test the speed of the fake and the write speed is 265KB/s, being the read speed 327KB/s. thanks in advance. |
ZeBuddha
Joined: Sep 04, 2007
Posts: 4
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I got a 2GB M2 card not very long ago for my K800i (previously having a 1GB card in it). Since I swapped it I've had a bit of a serious problem: I can't select the memory card as the place to save pictures to. If I do, it simply won't take the picture. I take a LOT of pictures with my K800, and the 80-something MB internal is simply not enough. Oh, incidentally, the 2GB is a Sandisk and the 1GB is a Sony.
Note: My K800i is one of the first ones out on the market (at least in Europe). I got it about 2 weeks after it appeared. I don't even know if I ever updated the FW. For the rest I have NO idea, haven't messed around with it. Software versions:
CXC1250210
R1CB001
060608 |
max_wedge
Joined: Aug 29, 2004
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From: Australia
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On 2007-06-02 14:35:57, max_wedge wrote:
My K750 also runs DCU-60 faster than bluetooth - it seems K800 has dropped the ball on DCU-60 speed? Disappointing...
Now that I have the K800, I can confirm that for me, the DCU60 cable transfer speed is actually 20% faster than the DCU60 speed of the K750. Certainly NOT slower than bluetooth at all.
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Posted: 2007-05-29 01:26
