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is a class 4 8GB SD card good enought if i want to use Apps2SD?
caleoss said:
is a class 4 8GB SD card good enought if i want to use Apps2SD?
Click to expand...
Click to collapse
I wouldn't use it, though people are of differing opinions/experiences. I have seen people post that their Class 2 works fine. It is really up to you in the end.
Though,
Class 2 = 2 MB/s
Class 4 = 4 MB/s
Class 6 = 6 MB/s
I use class 6.
But you should be fine. When in doubt, try it.
Further, this probably isn't the correct forum to post this in.
Please post in General.
This has nothing to do with Development of the G1
Moved to General
quick question, and im sorry if it has bin answered but... is a 16 gig class 2 sd card stable enough for a sense ui rom to work on a G1 with no problems??
or what a good sd card for the sense ui roms to work as good as the cupcake or the eclair roms?
thanks
For swap, which you absolutely need with Sense, you should use the fastest card you can get, which is currently 6 (although there are some C10 cards floating around, I don't think anyone here has tried them in the Dream).
Honestly on a card like that Sense will not be usable. I have CM6 running with a 64mb swap partition on a class 2 card and I still get the homescreen reloading 50% of the time.
AdrianK said:
For swap, which you absolutely need with Sense, you should use the fastest card you can get, which is currently 6 (although there are some C10 cards floating around, I don't think anyone here has tried them in the Dream).
Honestly on a card like that Sense will not be usable. I have CM6 running with a 64mb swap partition on a class 2 card and I still get the homescreen reloading 50% of the time.
Click to expand...
Click to collapse
HM, i see...so class 6 is much more stable workin' in other words.
so even if the sd card has alot more space, its still lags since its class 2?
i have cm 6 workin' on mine aswell, and its 16 gb.
but it some times loads up from time to time...nothin' big... i just haven't tried one of those hero sense UI roms on it since i recently got the card and i wanted to know if it would work as good as the cm6 rom( froyo) rom i got on my g1...
Class for sd card's is how fast you can read/write to the memory card. Class 2= 2MB/S and class 6=6 MB/S. It doesn't matter if the class 2 is 128 GB and the Class 6 is 2 GB, the higher class sd card will always perform better. The write limit to my phone is somewhere around 3.5 MB/S, so a class 4 will satisfy that. A class 10 is pure overkill unless you have an HD 1080P camcorder that needs the extra speed.
What MicroSDHC cards have any of you used successfully with the Nook Color? I intend to run Froyo off it until the Honeycomb ports become more stable.
I was considering the Patriot LX Class10 16GB from Newegg, but there is one review saying they had issues. Is this just a case of user error? Has anyone used this card successfully? Any suggestions on other quick cards with good capacity and decent pricing?
I assume this subject has already been covered, but my web searches only got me about 30 tabs open in Chrome and a lot of threads with vague answers that go off topic. If one isn't out there yet, a sticky thread for people to list specific cards they are using would be awesome.
I would appreciate any help.
I've used a Patriot Class 10 8 gig and a Kingston Class 4 4 gig successfully.
The Patriot tests out as a Class 10, significantly faster than the Kingston, yet both gave me UI response significantly choppier and frustrating compared to stock eclair (rooted). Both were similar.
And no, it wasn't the media server.
I put it down as standard using booting from an SD even though other people have commented on SD froyo being snappier. Maybe both cards suck for froyo.
SD card speeds
Here are my numbers:
Patriot 8 gig Class 10
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : Crystal Dew World
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 20.049 MB/s
Sequential Write : 13.894 MB/s
Random Read 512KB : 19.281 MB/s
Random Write 512KB : 1.687 MB/s
Random Read 4KB (QD=1) : 2.418 MB/s [ 590.2 IOPS]
Random Write 4KB (QD=1) : 0.014 MB/s [ 3.5 IOPS]
Random Read 4KB (QD=32) : 3.324 MB/s [ 811.6 IOPS]
Random Write 4KB (QD=32) : 0.034 MB/s [ 8.4 IOPS]
Test : 50 MB [N: 5.0% (5.8/115.8 MB)] (x5)
Date : 2011/03/01 20:25:41
OS : Windows XP Home Edition SP3 [5.1 Build 2600] (x86)
---------------------------------------------------------------------
Kingston Class 4 4 Gig
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : Crystal Dew World
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.700 MB/s
Sequential Write : 4.277 MB/s
Random Read 512KB : 17.269 MB/s
Random Write 512KB : 0.677 MB/s
Random Read 4KB (QD=1) : 2.011 MB/s [ 490.9 IOPS]
Random Write 4KB (QD=1) : 0.006 MB/s [ 1.5 IOPS]
Random Read 4KB (QD=32) : 2.088 MB/s [ 509.7 IOPS]
Random Write 4KB (QD=32) : 0.016 MB/s [ 3.9 IOPS]
Test : 50 MB [N: 0.0% (0.0/3750.0 MB)] (x5)
Date : 2011/03/01 19:39:27
OS : Windows XP Home Edition SP3 [5.1 Build 2600] (x86)
Thanks for the quick reply and the numbers. I would assume the Patriot Class 10 16GB would have similar performance to your 8GB.
I am starting to wonder if the stuttering you are getting is from the Class 4 having too slow writes and the Class 10 is causing errors from being too fast for the Nook's card reader, or general compatibility. Maybe a Class 6 would be a better fit.
Which Froyo ROM did you use?
I used both 0.6.7 (packaged and "raw") and 0.6.8. I struggled with them enough to get the Market running and somewhat decent wifi speeds (though not stellar) and then threw in the towel. When I get bored I'll probably give the eMMC version a shot to see if it's all that and a bag of chips like they say.
And that's an interesting theory. I've not seen any one propose that a card could be TOO fast for the nook. I'd say it's far-fetched but I admit that I'm not an EE.
hello, i am also a newbie with Nook Color and am planning to root my nook. i am also looking for recommendations on what micro sd to purchase to root.
Here's my specs:
Software: 1.1.0
Model : BNRV200
Serial Number : 2010*************
I found another post that tried to start a thread for cards that worked, but the discussion died out. However, it did list a good number of success/fail rates.
From computerpro3:
Known Good
16GB Class 4 Patriot - 5.9, 6.6, 6.7
8GB Class 6 Lexar - 6.6, 6.7
8GB Class 6 Wintec - 5.9 (untested 6.6 and 6.7)
4GB Class 2 MicroCenter brand - 5.9, 6.6, 6.7
4GB Class 6 Transcend - 5.9, 6.6, 6.7
4GB Class 6 Adata - 5.9 (untested 6.6 and 6.7)
2GB Class 4 Sandisk - 6.6, 6.7
Known Bad:
16GB Class 6 RiData - hangs on Android boot screen with 5.9, with 6.6 and 6.7 it boots but gets endless loops of force closes. Tried multiple cards, all brand new.
16GB Class 10 Patriot - same symptoms as above
16GB Class 10 Wintec - same symptoms as above
16GB Class 6 Transcend - same symptoms as above
16GB Class 10 Adata - same symptoms as above
Click to expand...
Click to collapse
It looks like the Nook just doesn't like 16GB cards for the most part, and I haven't found a completely positive review of a Class 10 card. Perhaps that is a Nook hardware issue (buffer overrun by too much data from card at once), flaws in card construction, or an issue with the ROM and specific cards.
I was going to go with a Patriot Class 10 something, but swoozle's stutter scared me, so I went with a cheap card to at least learn on. Wintec Class 6 8GB is on sale today from Newegg for $11 shipped. If it doesn't work, I can throw it into my photo frame. People seem to like it though. One review notes it having class 10 speed.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820161404
I plan on running eMMC once I get my card.
Swoozle, please let us know if the stutter goes away with eMMC on your cards.
Thanks again.
Does it help more if I buy a new faster SD card (default card is a Class 2 card), or do optimizations such as this one: http://forum.xda-developers.com/showthread.php?t=888379
I'll probably get a Class 6 card, as I haven't seen any Class 10 yet for micro SD.
Spaceman-Spiff said:
Does it help more if I buy a new faster SD card (default card is a Class 2 card), or do optimizations such as this one: http://forum.xda-developers.com/showthread.php?t=888379
I'll probably get a Class 6 card, as I haven't seen any Class 10 yet for micro SD.
Click to expand...
Click to collapse
Yes, faster SD cards do help quite a bit. I used a class 4 for a while and it was noticeably improved for apps2sd on eclair. I got a class 10 for Christmas and the improvement over class 4 was definitely noticeable but not as dramatic. I've read that there isn't much of an improvement between class 6 and class 10 due to hardware limitations inside the phone. For HD video recording I've seen recommendations for class 6+.
Khalpower's optimization script is amazing for eclair. I recommend the JIT, optimized build.prop, overclock and apps2sd. There is also a newer JIT, but I'm not sure if khal incorporated it into his script yet. I think we're still struggling to get the froyo builds to measure up to the optimized eclairs.
Not sure though, I find my XT720 is more compatible with class2 SD cards. I've got one 4GB Class2 Card, one 8GB class2 Card and one 8GB Class6 card which all made by SansDisk. all of these, the most compatible one is the 4GB class2 Card. Although the Class6 card is faster and perform better, there's an issue with stability, where the phone frequently cannot mount the card when the phone is booted.
pls tell your suggestions.
Spaceman-Spiff said:
Does it help more if I buy a new faster SD card (default card is a Class 2 card), or do optimizations such as this one: http://forum.xda-developers.com/showthread.php?t=888379
I'll probably get a Class 6 card, as I haven't seen any Class 10 yet for micro SD.
Click to expand...
Click to collapse
there are class 10 micro SD but the prices are outrageous at the moment.
class 6 16GB is the best bang for the buck right now
the 32GB are still stuck on class 4
looking forward to get some 32GB class 6 when they come out
Thanks for the comments. I think I'll get a 16GB class 6.
32GB microSD are also still pretty expensive (above $100).
Been using the Class 6 for a day now and I can feel speed improvements in loading apps or data from the sd card. I also cleared the factory settings to start fresh.
I've got a class 10 16 GB microSD card for 30 € in Germany, which is about 40 $. I think that's a fair price. I haven't used it yet, so I can't tell you if it is faster or not.
spyeye95 said:
I've got a class 10 16 GB microSD card for 30 € in Germany, which is about 40 $. I think that's a fair price. I haven't used it yet, so I can't tell you if it is faster or not.
Click to expand...
Click to collapse
the price cost doesn't match the quality...
it might be an imitation all original class 10 minimum price are over $100+ specially for the 16GB version
seems like they sold you a Class 4 16GB instead
run some test on it, and you'll find out
$36.99 at Newegg.
3rdstring said:
$36.99 at Newegg.
Click to expand...
Click to collapse
I'm always hessitant to buy something with that odd of a price/speed ratio. I was actually reading the reviews and found something VERY interesting. There was one person who was mentioning an app called SD Speed Boost that was described as being able to adjust the sd card cache, thus speeding up the read/write speed to the card. It was only a dollar, so I tried it.
WOW...
It has improved the speed of my system 10x. I was skeptical at first, but I realized that if I run SD Tools from the market to test the speed before and after, it shows a significant increase in read/write speed. Obviously, those of us who have apps and cache on our sd card are constantly hitting it and the card's performance will affect performance.
Does anyone else want to tackle this $1 app and confirm my findings? If this is the answer to our slowness problems, maybe the settings that this app changes can somehow be added to our ROMs for everyone to benefit!
reverendkjr said:
I'm always hessitant to buy something with that odd of a price/speed ratio. I was actually reading the reviews and found something VERY interesting. There was one person who was mentioning an app called SD Speed Boost that was described as being able to adjust the sd card cache, thus speeding up the read/write speed to the card. It was only a dollar, so I tried it.
WOW...
It has improved the speed of my system 10x. I was skeptical at first, but I realized that if I run SD Tools from the market to test the speed before and after, it shows a significant increase in read/write speed. Obviously, those of us who have apps and cache on our sd card are constantly hitting it and the card's performance will affect performance.
Does anyone else want to tackle this $1 app and confirm my findings? If this is the answer to our slowness problems, maybe the settings that this app changes can somehow be added to our ROMs for everyone to benefit!
Click to expand...
Click to collapse
Is this the app your'e referring to? My write speed stayed about the same @10.7MB/s but the read speed went from @16 to 23 with a 1MB cache. I don't have any apps on the sd card to verify that aspect of any performance boost but Media Gallery loaded pretty quick.
:Edit: A 2MB cache improved the read speed to 43MB/s
3rdstring said:
Is this the app your'e referring to? My write speed stayed about the same @10.7MB/s but the read speed went from @16 to 23 with a 1MB cache. I don't have any apps on the sd card to verify that aspect of any performance boost but Media Gallery loaded pretty quick.
:Edit: A 2MB cache improved the read speed to 43MB/s
Click to expand...
Click to collapse
Yes, this is the app i'm using. I've been "field testing" this all day, and I must say that I have never had this type of responsiveness and speed from this phone EVER. I am loving this $1 addition to my phone. I have a class 4 card that seems to be giving me 6mb write/33mb read and that is substantially better. I've tinkered with the different settings and found arount 3000 giving me the best numbers with my specific card. I can only imagine that a different class card would need different settings.
3rdstring said:
$36.99 at Newegg.
Click to expand...
Click to collapse
newegg i'll trust, and patriot is a "ok" brand
they started producing high quality SD stuff in the last couple of years
but if you show me the same thing from eBay... no way in hell
reverendkjr said:
Yes, this is the app i'm using. I've been "field testing" this all day, and I must say that I have never had this type of responsiveness and speed from this phone EVER. I am loving this $1 addition to my phone. I have a class 4 card that seems to be giving me 6mb write/33mb read and that is substantially better. I've tinkered with the different settings and found arount 3000 giving me the best numbers with my specific card. I can only imagine that a different class card would need different settings.
Click to expand...
Click to collapse
i'll try it out as well, it's only $1
SD Speed Boost, if it works it'll go into all my phones, as i have everything installed to SD anyways
hey just checking before i hit the pay button, is it this one?
SD Card Speed Booster
Jim Weiler
https://market.android.com/details?id=com.vaelek.sdspeedboost
reverendkjr said:
I'm always hessitant to buy something with that odd of a price/speed ratio. I was actually reading the reviews and found something VERY interesting. There was one person who was mentioning an app called SD Speed Boost that was described as being able to adjust the sd card cache, thus speeding up the read/write speed to the card. It was only a dollar, so I tried it.
WOW...
It has improved the speed of my system 10x. I was skeptical at first, but I realized that if I run SD Tools from the market to test the speed before and after, it shows a significant increase in read/write speed. Obviously, those of us who have apps and cache on our sd card are constantly hitting it and the card's performance will affect performance.
Does anyone else want to tackle this $1 app and confirm my findings? If this is the answer to our slowness problems, maybe the settings that this app changes can somehow be added to our ROMs for everyone to benefit!
Click to expand...
Click to collapse
AllGamer said:
hey just checking before i hit the pay button, is it this one?
SD Card Speed Booster
Jim Weiler
https://market.android.com/details?id=com.vaelek.sdspeedboost
Click to expand...
Click to collapse
Yes, that's the one.
AllGamer said:
hey just checking before i hit the pay button, is it this one?
SD Card Speed Booster
Jim Weiler
Click to expand...
Click to collapse
Just installed.
OS: Dexter's 1.3 froyo with bugfix 2
SD Card: Adata 16GB Class 6
Speed Test
Average result from running 3x:
128KB cache: Read: 13.96MBps; Write: 6.63MBps
1024KB cache: Read: 22.40MBps (60% faster); Write: 6.93MBps
2048KB cache: Read: 36.67MBps (163% faster); Write: 6.90MBps
4096KB cache: Read: 33.67MBps (141% faster); Write: 6.90MBps
Interesting. The app seems to increase Read-speed only. I need to find an ideal cache size for optimal speed increase, so far it seems to be 2MB for me.
I'll rerun with my old Class 2 microSD card when I get home.
Spaceman-Spiff said:
Just installed.
OS: Dexter's 1.3 froyo with bugfix 2
SD Card: Adata 16GB Class 6
Speed Test
Average result from running 3x:
128KB cache: Read: 13.96MBps; Write: 6.63MBps
1024KB cache: Read: 22.40MBps (60% faster); Write: 6.93MBps
2048KB cache: Read: 36.67MBps (163% faster); Write: 6.90MBps
4096KB cache: Read: 33.67MBps (141% faster); Write: 6.90MBps
Interesting. The app seems to increase Read-speed only. I need to find an ideal cache size for optimal speed increase, so far it seems to be 2MB for me.
I'll rerun with my old Class 2 microSD card when I get home.
Click to expand...
Click to collapse
I think the app is just changing the value in /sys/devices/virtual/bdi/179:0/read_ahead_kb
The default value seems to be 128. You can set the value using e.g.
Code:
echo 2048 > /sys/devices/virtual/bdi/179:0/read_ahead_kb
I have a 16GB Kingston "class 10" (see also complaints about this card throughout XDA--I got it as a gift and I believe it was on sale for $40 at the time).
I've been testing read and write speeds with "SD tools" (free). SD tools writes and reads 190 MB and displays a dial as it goes so I can see that the initial write speed starts pretty high (10 MB/s) and then quickly falls significantly within a few seconds (probably after an on SD card buffer gets filled) eventually stabilizing at 3.3 MB/s. So, clearly this card is not really class 10 at all as it cannot sustain 10 MB/s except for what seems to be a 1 sec burst. As far as read and read_ahead_kb goes:
128 -- 14.1 MB/s read (avg of 3)
1024 -- 22.4 MB/s read (avg of 3)
2048 -- 43.2 MB/s read (avg of 3)
4096 -- 38.2 MB/s read (avg of 3)
Optimal also seems to be 2MB for me.
Mioze7Ae said:
Code:
echo 2048 > /sys/devices/virtual/bdi/179:0/read_ahead_kb
Click to expand...
Click to collapse
man!... THANK YOU! i'll try changing that manually and see if there's any improvement
I was hoping that someone would figure out a way to just add this as a default into our ROMs. It was worth a dollar to get this conversation started.
Hi all, I have a couple of questions before I get my new sd-card.
1. I got my eyes on the SanDisk Ultra UHS-1 8gb class 10 sdcard with a write speed of 30mb/s(advertised). I was just wondering if there would be a noticeable speed difference (i.e. App loading time) if I partitioned that sdcard, as compared to my current class 4 Kingston sdcard.
2. Also, I've read from many forums that some devices don't see noticeable increase in speed from class 6 onwards... Is that true for our device too? (SGM)
3. Is ext4 partition better or ext3 partition better?
Sent from my GT-S5570 using xda app-developers app
Hi, any help? It's been here for a few days already and I really want to know some details before I get my new SDcard so that I won't be disappointed or regret anything.
tietganFTW said:
Hi all, I have a couple of questions before I get my new sd-card.
1. I got my eyes on the SanDisk Ultra UHS-1 8gb class 10 sdcard with a write speed of 30mb/s(advertised). I was just wondering if there would be a noticeable speed difference (i.e. App loading time) if I partitioned that sdcard, as compared to my current class 4 Kingston sdcard.
2. Also, I've read from many forums that some devices don't see noticeable increase in speed from class 6 onwards... Is that true for our device too? (SGM)
3. Is ext4 partition better or ext3 partition better?
Sent from my GT-S5570 using xda app-developers app
Click to expand...
Click to collapse
1. Well u surely won't get the advertised mb/s, but it will be a reasonably fast speed, as speed depends on your cable too (for trasnfer). I'm not sure, but yes u will notice that apps load faster (im basing this on what michie said in the swapping section of the performance thread, so its probably the same for loading from external partition)
2. Yes probably little difference between a class 6, 8 and 10. Maybe because most devices can't read beyond a certain speed or even if they do, that threshold speed is enough and lies in the range of class 6 upwards.
3. I don't really know, but i would suggest ext 4 as i see it recommended in many app to sd apps. Someone could clarify this.
kirakun said:
1. Well u surely won't get the advertised mb/s, but it will be a reasonably fast speed, as speed depends on your cable too (for trasnfer). I'm not sure, but yes u will notice that apps load faster (im basing this on what michie said in the swapping section of the performance thread, so its probably the same for loading from external partition)
2. Yes probably little difference between a class 6, 8 and 10. Maybe because most devices can't read beyond a certain speed or even if they do, that threshold speed is enough and lies in the range of class 6 upwards.
3. I don't really know, but i would suggest ext 4 as i see it recommended in many app to sd apps. Someone could clarify this.
Click to expand...
Click to collapse
Alright, I don't really care about what michie said (no offence), i just want to know if it really works as michie said (personal experiences). I don't wanna buy a new sdcard, just to realise there's not much difference...
tietganFTW said:
Alright, I don't really care about what michie said (no offence), i just want to know if it really works as michie said (personal experiences). I don't wanna buy a new sdcard, just to realise there's not much difference...
Click to expand...
Click to collapse
I don't guarantee anything though Just hope it does the trick!
Try Sd tools free on playstore to test your sd speed write/read before partition
(I try Speed Write true normal like sd class : 10Mb/s (class 10)
and test again after partition.
(I Test it & The Result Sd speed write reduce to 8Mb/s after partition but sd read Increase, test on my sd class 10)
If you want to boost more speed you can try free app called sd booster on playstore.
Good app to gain more speed.
Give a try...
Sent from my GT-S5570 using xda app-developers app
Jeffrianz said:
Try Sd tools free on playstore to test your sd speed write/read before partition
(I try Speed Write true normal like sd class : 10Mb/s (class 10)
and test again after partition.
(I Test it & The Result Sd speed write reduce to 8Mb/s after partition but sd read Increase, test on my sd class 10)
Click to expand...
Click to collapse
So buying a class10 sdcard does help increase the apploading speed in a2sd?
Maybe yes maybe no? some sd different so you must try in my case. yes the speed reduce.
From 10 to 8Mb/s
but Read Speed Increase from 23Mb/s to 28Mb/s
if I use sd booster and set it on 6Mb. my sd write reduce to 6.8 mb but Read speed increase to 32,1 Mb/s
and I got more speed read to gain more smooth performance to play game and more.
also speed up booting on your phone.
but decrease performace make a file like recording and take a photo.
but speed app is awesome.
Sent from my GT-S5570 using xda app-developers app
Jeffrianz said:
Maybe yes maybe no? some sd different so you must try in my case. yes the speed reduce.
From 10 to 8Mb/s
but Read Speed Increase from 23Mb/s to 28Mb/s
if I use sd booster and set it on 6Mb. my sd write reduce to 6.8 mb but Read speed increase to 32,1 Mb/s
and I got more speed read to gain more smooth performance to play game and more.
also speed up booting on your phone.
but decrease performace make a file like recording and take a photo.
but speed app is awesome.
Sent from my GT-S5570 using xda app-developers app
Click to expand...
Click to collapse
You didn't get my point. I'm talking about app-reading speeds in app2sd in an ext4 partition. As in app-loading time. Would it decrease?
Yes off course Increase If you boost your memory... more speed you have but low write.
I'm use ext4 partition too as my Internal memory with Internal HACK memory and OC.
Take a look.
Iam using sd class 10 transcend 16GB.
and use ext partition as default memory and now all of my app in ext4.
app speed & booting is great after I use sd class 10 then my old sd card sandisk 4GB class 4.
Sent from my GT-S5570 using xda app-developers app
Jeffrianz said:
Yes off course Increase If you boost your memory... more speed you have but low write.
I'm use ext4 partition too as my Internal memory with Internal HACK memory and OC.
Take a look.
Iam using sd class 10 transcend 16GB.
and use ext partition as default memory and now all of my app in ext4.
app speed & booting is great after I use sd class 10 then my old sd card sandisk 4GB class 4.
Sent from my GT-S5570 using xda app-developers app
Click to expand...
Click to collapse
So the app-loading speed does increase huh... Alrighty then I'll consider getting a new one. Thanks much.