i get usb 1 speeds is this right?
what is the question??!?!
You've got USB 1 on Magician (for file transfer) if this is the question...
DocteurN said:
You've got USB 1 on Magician (for file transfer) if this is the question...
Click to expand...
Click to collapse
thanks, usb 2 would of been nice to fill up those 2gb cards :twisted:
Wrong.
Most likely the bottleneck for speed is the SD card itself, not USB (1 or 2). Generally large SD cards have awful transfer speeds - write is terrible, read is passable.
You can get "professional" SD cards with different transfer speeds, usually designed for professional photographers who need to take lots of high-quality (and hence BIG) photos really quickly.
> > This site < < has lots of them - search for "60x SD card" and have a look.
KevinL said:
Wrong.
Most likely the bottleneck for speed is the SD card itself, not USB (1 or 2). Generally large SD cards have awful transfer speeds - write is terrible, read is passable.
You can get "professional" SD cards with different transfer speeds, usually designed for professional photographers who need to take lots of high-quality (and hence BIG) photos really quickly.
> > This site < < has lots of them - search for "60x SD card" and have a look.
Click to expand...
Click to collapse
2gb ultra has high write speeds but not much point if the bottleneck is usb 1!
The bottleneck is not the SD. If I put my SD (regular Sandisk 1GB) in my USB2 card reader I get much higher speeds. I guess ActiveSync steals some speed to, but USB1 is really slow.
Related
Is there any way to ge tthe camera application to store the pictures and video taken directly onto the SD card instead of internal RAM?
From within the Camera Application click on the "tools" Icon, then click tools (bootom toolbar) and select options from there you have an option to change the folder wher the image is stored....simply select storage card.....or whatever else you deem appropriate. :lol:
Bugger that wa easy; how dim??
However, after some experimentation I have found it is not practical to store video directly to a card - the transfer rate is not fast enough and the video end up jerky.
strange, I wonder if it has anything to do with the type of SD card you are using, I take videos quite regularly at times a good 2-3 minutes in length which I mail to family back home in the UK and I can't say i've exeperienced anything similar to what you mention. I'm using a SanDisk 512 card with the latest ROM release from I-Mate.
My SD is a Kingston 256.
I wonder if it is something to do with the access times of the SD cards??
I know if you spend more you get a card with faster access times.
Or; what resolution are you taking the video clips in? Obviously the larger resolution will require more data throughput and may slow down the 'saving' of data.
Whats stranger: The Kingston 256MB (Toshiba manufactured) are quite good & stable, whereas Sandisk tipically performs worse and is less stable!
So it has to be the resolution used.
I too experience limitations of the datatroughput when capturing video (biggest resolution) directly to SD.
For pictures it is not a problem.
accesstime should be very low on all sd cards not sure if they differ
accesstime is how long the system can get to the data sector it want to read or write
accesstime mean alot more with hd's because they are mechanical
sd and other flash types have very low accesstime
but the read and write thruput differ
you can use pocket mechianics to benchmark and compare with other sd cards in other pda's
I use the large capture size (240x320) i''ve got pocket mechanic on mine so i'll post the benchmark reults when i get a minute
Sandisk are as good as any other, I have been using them now for 1 year in my MDAII and have been operating without any problem, I use them to store Video, photo's and mp3, and change on a daily basis between about 3 different cards (music, video and photo's)
well in the pocketmechanics benchmark sandisk are not as fast as many other brands
Is it really, didn't know that
So which is the fastet 512 SD currently
donno
try looking at the bench's in pocketmechanics
also there looks to be a difference between the
sd speeds of different pda brands
and also i doubt the benchlist in pocket mechanics
is up to date
and then there is the problem with some cards not being compatible
with some pda's
......
all i got is error message when i set it to save directly to sd card
i have lexar 1gb card.
error message is
cannot record the file
36001106:0
fail to ....the film...etc
any idea?
I havent looked too deeply into this, preferring to ask like .. So please don't eat me.
Its late and all ..
I'm wondering what speed the SD card reader in the Universal is?
Is it worth spending a little extra on some 60x Corsair SD cards or should I just get the bargain bin stuff since the Universal maybe doesnt have a particularly quick card reader?
Any advice welcome. I plan to use this is a system disk with seperate 512 card for my MP3's and pod casts/documents. THAT will be cheap stuff.
But for the main I need a 1gb system disk for storing apps and system stuff.
Compared to a dedicated USB card reader for the PC, the Universal is extremely slow - I have tested this with my 150X 2GB SD card. So unless you plan on using it with a PC card reader, it doesn't really matter
Accessing the SD card through activesync was at least 10 times slower than the card reader...
I did a small test with Pocket Mechanic.
1. My "normal" 2 GB sandisk gives 0.84MB/sec
2. My super duper Extreme III Sandisk 1 GB gives me a whopping 0.88MB sec.
Nr . 2 card, in my portable, writes files much, much faster than nr.1.
You can see however that in my Jasjar the difference is nearly zero.
I would say: go for the cheapest, but I am not a great technician.
Huib
Thanks guys ..
Very informative and will help me get the right card. ie. the cheapest!
-Gubbs
Hi
I have not noticed any difference between a basic Sandisk card and a so called 66x KingMax card when used in the exec.
I do notice a difference between these two cards when using them with my digicam - the multishot mode (2 frames/sec) actually works cause the camera is able to write to the card quickly enough. With the slow card, cam kept pausing to write its cache onto the card.
I am not sure that pocket mechanic tells the truth! Likewise, timing a copy from the internal flash to an SD card is not gonna give accurate results (speed of internal flash may be bottleneck). On Wm2003 devices this was possible cause RAM is loads faster than flash still.
You cant test the speed of the SD reader in the exec over activesync tho!! Its a USB 1.1 device (max 11Mbit) and on top of that activesync treats it as a 10Mbit network card. Max you'll see after overheads is thus around 1MByte/sec
Nigel
veletron said:
Hi
You cant test the speed of the SD reader in the exec over activesync tho!! Its a USB 1.1 device (max 11Mbit) and on top of that activesync treats it as a 10Mbit network card. Max you'll see after overheads is thus around 1MByte/sec
Nigel
Click to expand...
Click to collapse
Certainly much better to do it that way.
Huib
ok i m having problem to decide as well...
anyone has a more concrete data about this ?
i m thinking whether to choose a normal 66x or 133x ...
getting 2gb sd card.. either transcend or pretec...
by the way exec sd slot is 1.01 or 1.1 specification?
hope someone has a benchmark to share.. thanks
1gb Scandisk does the job for me.
Watched a movie on it the other night, perfect. Plenty fast enough.
Its HTC so you can be assured it will be genius design with cheap crap chipset.
Bit like an Italian sportscar.
get one of those sd-usb card combo's....if u can find one going at a decent price.
saves the hassle of card readers. the LAST thing anyone needs is yet another wire lol
I've noticed that copying files to the phone (to storage card) via USB cable is painfully slow (as compared to say regular USB stick).
Would purchasing a high speed MicroSD (e.g. Sandisk Premier) help or is the phone itself the bottleneck?
Thanks!
Try connecting your phone as a mass storage device, if you haven't done that already.
You can select this when you plug in the usb cable.
Accessing the storage card is way faster then.
milan_ns said:
I've noticed that copying files to the phone (to storage card) via USB cable is painfully slow (as compared to say regular USB stick).
Would purchasing a high speed MicroSD (e.g. Sandisk Premier) help or is the phone itself the bottleneck?
Thanks!
Click to expand...
Click to collapse
I have purchased SanDisk Mobile Ultra (Class 6) and the performance increase in real terms is marginal!
milan_ns said:
I've noticed that copying files to the phone (to storage card) via USB cable is painfully slow (as compared to say regular USB stick).
Would purchasing a high speed MicroSD (e.g. Sandisk Premier) help or is the phone itself the bottleneck?
Thanks!
Click to expand...
Click to collapse
It would certainly help. Also search this forum for tnyynt's SD Tuneup cab. Note that installing that cab only makes much of a difference once you got a faster SD.
The transfer speed of the SD is limited for whatever reason, power preservation, whatever, it's limited to optimize for slower SD cards. So The SDTuneup cab ups this limit, meaning you will notice a much bigger speed difference when using faster SD cards.
i also find the msd card speed poor. especially when you open up a folder with a lot of images every image software takes minutes to scan the folder.
that is very lame
I've looked everywhere. No one seems to have posted them. What are they?
Right now I'm a bit confused. Since this is an awesome device you'd think it would be fast in every aspect. It is, except for USB file transfers.
I'm running on Windows 7 Ultimate. I backed up everything from my phone to the computer with a data transfer rate from the SD card, in the phone, of 4.5MB/s. I then formatted the card (read earlier that this would help with the HD2 lock-ups) and copied everything back onto the SD card in the same fashion, through the phone. The data transfer back is right around 2.5 MB/s.... ???
I've tested all the ports around the computer, each are about the same. Anyone have any idea on how to fix this?
First thing would be to tell what kind and class of microSD card you have...
That would really depend on your SD card "class".
The higher the class, the faster it is capable of performing reading and writing operations.
But it's better to avoid the 16GB cards... the larger capacity cards take much longer to read... regardless of classifications or brand.
Something like a 4GB - Class 6 card is excellent.
I've read that it's only a class 2 MicroSD. Do you guys know where I can get class 4, or even a class 6 MicroSD? Whichever I get however depends on the max speed of the HD2. For example, I don't want to buy a class 6 and find out that the HD2 can only handle speeds up to the class 4. There is a $30-$40 USD difference.
Thanks for the SD info, it definitely helps. But now we're brought back to my original question. What are the max transfer speeds through the phone onto/from the MicroSD card? Has anyone found out?
personally i wouldn't do large data backups through activesync/MDC with the card still in the phone.
its simple to remove the card and put it in the supplied adapter card for use with sd_readers.
i bought a usb1.1 reader from a 'pound' shop, copying large files takes alot less time (average 10-11mb/sec) with my more expensive usb2.0 reader its even faster (average 50-60mb/sec)
card class does make a difference, but then so does sending large amounts of data through a 'middle man' like activesync or device center.
budget SD reader FTW
That is a good point, and I agree is faster than through the phone. For me though I have a few accessories on the phone which make taking the SD card out quite a pain.
I have an invisishield on the screen, and a poly-something or other high density plastic cover to replace the cover that came with the phone,-- It grips around the HD2 tightly. The cover is wonderful, but it tends to interfere with the invisishield. So if I am continually taking the cover on and off to get the SD card out I will eventually bend up the edges of the invisishield and will need to get that replaced.
In my best attempts to keep the phone nice I'm going to have to stick with whatever input/output the HD2-to/from-SD can give me.
choosing disk drive mode rather than active sync is the easiest way to speed up file transfers.
re: the figures you gave in post 1, write is always slower than read.
Forgot to mention, it was in 'disk drive mode'.
Btw, I found that the HTC HD2 is USB 2.0 Hi-Speed capable out-of-box. (I'd post a link, but forums wont let me, being new), and Hi-Speed USB can transfer 480Mbits/s, or ~57MB/s (Wikipedia, Universal Serial Bus, Signaling).
The Class 6 MicroSD card can write 48Mbits/s, or 6MB/s (Wikipedia, Secure Digital, Speeds). Easily obtained for the HD2.
Assuming this is everything that needs to be dealt with, this should work out wonderfully. I'll be writing files 300% faster with a class 6, and reading a whole lot faster (thanks Samsamuel, forgot about that read/write differences). Question is though, is this all? Or do I need to install some hi-speed usb driver on the computer? Or are there other things I'm not seeing that need to be dealt with?
its also worth remembering when you are doing the maths that USB loses around 25/35% to networking overhead. (the data that makes up the packet that holds the data you are transferring)
So, 480 Mbit = 60MBytes total = around 35Mbytes actual data transferred per second. (Results vary depending on the system, the cable, all kinds of things, but 30-35 is average, a little more in a testbed situation.
So I guess I'll just have to suffer with 219% faster instead of 300%... Well, looks like I'm returning the HD2!
i bought this new card and was happy that i have a fast card now and that the transferring data with usb connection would be faster, but it is not.
The writing speed is between 3-5 MB/s, not better then my old Sandisk 16gb class2 card.
I have aMAGLDR v1.13 with CWM v.5.0.2.7.
I use the usb mount from CWM and transfer data through it, but it is really a disappointment. I format the card through different ways, all without any success.
On the my computer the card is not faster with FAT32 (with the micro sd adapter), when i format the card to NTFS it is really fast, but i can not use it on my phone with NTFS. Is Fat32 the problem here?
Does someone have the same card and could approve this problems or am i the only one?
thanks in advance /masteroe
try this..
get into android and see if this app works...it will increase the cache...you should see difference..
thanks, i tried this already without any success.
it seems that the problem is not this value. In the CWM this value is not interesting at all.
As i told you on Windows i have same performance issues with FAT32....
If you bought your SD card from Ebay you probably bought a fake Class 10
domimatik said:
If you bought your SD card from Ebay you probably bought a fake Class 10
Click to expand...
Click to collapse
it is not from the bay it is a original card (i hope) from amazon.
Class 10 only assures you of 10MB/S on sequential write, so if the card has been written to a few times there could be some drop due to fragmentation. Also, there are various overheads to consider, moving the data about, issuing the write command to each block, wait for a confirmed write response, blahblah.
Here
http://www.smxrtos.com/articles/whiteppr/flashperformance.htm
Is a (very) technical explanation, which rather happily (or not) examines a 10MB/S raw write speed SD as an example (scroll way down) and calculates an actual write speed at 5MB/S.
samsamuel said:
Class 10 only assures you of 10MB/S on sequential write, so if the card has been written to a few times there could be some drop due to fragmentation. Also, there are various overheads to consider, moving the data about, issuing the write command to each block, wait for a confirmed write response, blahblah.
Here
http://www.smxrtos.com/articles/whiteppr/flashperformance.htm
Is a (very) technical explanation, which rather happily (or not) examines a 10MB/S raw write speed SD as an example (scroll way down) and calculates an actual write speed at 5MB/S.
Click to expand...
Click to collapse
thanks for your information, but i think there is an other problem, my class 2 card is faster as it seems . I'm copying 700 MB with 1,5MB at the moment, that is really frustrating....
hehe yea i know what you mean, mine always runs far slower than it probably should too, one point some meg/s, for both my class 2 and a class 6, never any faster, either through cwm, android usb mass storage, or my card reader. (Lots of built in card readers are just usb readers mounted to internal usb headers, and are often only usb1, which doesn't help, , usb has a lot of overhead, lots of info regarding usb overhead here http://www.smxrtos.com/articles/usb_art/usbperf.htm (if a little old))
i will give back the card. This card does not make sense with HTC HD2..
Thread can be closed ! Thanks anyway ..