Database Develop

Faster SD Card

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.

SD card speed?

i upgraded to a new SD card and run antutu to see how fast it is but to my surprise this new class 10 card is not faster than my old class 2 card.
so is there like a hardware limit or why could that be?
both cards have about
6mb/s write and
15mb/s read.
anyone got some better results with a class 10 card?
Sent from my Optimus 2X using XDA App

Some brands are faster than others even if they are from a lower class.
For example, my Sandisk class 2 is faster than a Kingston class 4.
Which brand is your card???
Cheers!

el_charlie said:
Some brands are faster than others even if they are from a lower class.
For example, my Sandisk class 2 is faster than a Kingston class 4.
Which brand is your card???
Cheers!
Click to expand...
Click to collapse
its a kingston class 10 vs sandisk class 2.
with a class 4 vs 2 i could underatand it but this is supposed to be a class 10 which should have about 10mb/s write speed according to wikipedia. that would almost be double the speed that i get...
Sent from my Optimus 2X using XDA App

Hi, with my 16GB Class 10 card I get these speeds;
Write 12.3 MB/s
Read 16.9 MB/s
My card is a no brand card I bought from eBay in March for £16.
http://www.ebay.co.uk/itm/16GB-CLAS...AsAccessories_MemoryCards&hash=item1c1f50b680
Anil

I have a Samsung Plus 16GB Class 10 and get:
According to SD Tools: 12.4MB/s write and 17.2 MB/s read.
According to AnTuTu: 11.3 MB/s write and 14.7 MB/s read.

16GB Sandisk Class 10 (Antutu 2.3.1, 2nd run.)
10.4 MB/s Read
10.0 MB/s Write
The card has 12.4 GB on it of real data before testing.
This is on GR3, which I don't think has any "SD-Card optimization". (Too lazy to check.)
Keep in mind that we don't know, at least I don't, how Antutu tests. If it's testing with a lot of independent reads/writes, the speed will invariably go down. (If copying a single large file from my computer, I get a much higher throughput.)
"Class 10" should only mean that your card is able to sustain 10MB/s of continuous writes, it doesn't say anything about access times/block erase speed (which can influence any benchmark.)

Hi TrymHansen, there is a free app called SD Tools which does nothing but test SD card speeds.
Edit:
FOR ANYBODY ELSE READING THIS THREAD:
The class rating of a card indicates the minimum speed the card will write at. Class 10 = 10 MB/s write speed. Read speeds are usually higher than write speeds.
Anil

Excuse me for being dense, but I don't get the point of your post. I explained in my post what Class 10 means, and then you post as if I asked what class 10 means.

TrymHansen said:
Excuse me for being dense, but I don't get the point of your post. I explained in my post what Class 10 means, and then you post as if I asked what class 10 means.
Click to expand...
Click to collapse
My post wasn't only for you. The first part about SD Tools pertains to you. And anyway your post is incorrect, the Class rating indicates the MINIMUM speed the card will write at. Which isn't the same as a sustained speed.
Anil

aksolanki said:
My post wasn't only for you. The first part about SD Tools pertains to you. And anyway your post is incorrect, the Class rating indicates the MINIMUM speed the card will write at. Which isn't the same as a sustained speed.
Anil
Click to expand...
Click to collapse
So even though Rusty already has measured his card with SD Tools:
Rusty! said:
I have a Samsung Plus 16GB Class 10 and get:
According to SD Tools: 12.4MB/s write and 17.2 MB/s read.
According to AnTuTu: 11.3 MB/s write and 14.7 MB/s read.
Click to expand...
Click to collapse
... you somehow assume I cannot possibly have read that, and strongly feel I should be singled out for a recommendation of an app EVERYBODY on XDA knows about. For that dedication I thank you.
My post is not incorrect. I'm saying exactly the same thing you did in the post following mine using different wording.
Anyway, I'm not about to start a flamewar with you. Thanks for the input, now lets go do something constructive.

TrymHansen said:
So even though Rusty already has measured his card with SD Tools:
... you somehow assume I cannot possibly have read that, and strongly feel I should be singled out for a recommendation of an app EVERYBODY on XDA knows about. For that dedication I thank you.
My post is not incorrect. I'm saying exactly the same thing you did in the post following mine using different wording.
Anyway, I'm not about to start a flamewar with you. Thanks for the input, now lets go do something constructive.
Click to expand...
Click to collapse
Hi TryHansen, I'm not sure why you are taking this personally. But I offer my apologies if I offended you.
Anil

thanks a lot for your feedbacks. so i will return this ****ty card, if it has only half of the specified speed i guess i have something to complain about....
Sent from my Optimus 2X using XDA App

grognaz said:
thanks a lot for your feedbacks. so i will return this ****ty card, if it has only half of the specified speed i guess i have something to complain about....
Sent from my Optimus 2X using XDA App
Click to expand...
Click to collapse
Hi grognaz, from your stated speeds it would seem you have a class 6 SD card. My card has no brand on it but it reads and writes at the speeds stated by the eBay seller.
Good luck. Anil

grognaz said:
thanks a lot for your feedbacks. so i will return this ****ty card, if it has only half of the specified speed i guess i have something to complain about....
Sent from my Optimus 2X using XDA App
Click to expand...
Click to collapse
I can confirm the quality of Kingston SD cards. My 16GB "Class 10" gets the following in SD Tools:
Writing Speed: 7.2MM/s
Reading Speed 13.5MB/s
It's good enough for me as I was considering just getting a Class 6 as I don't exactly do much HD video recording, but if you need the speed - avoid this card!

I am using Sandisk 32gb class 4 card.
Antutu Benchmark
SD card write: 5.6 MB/S
SD card read: 8.9 MB/s

Your SD Cache size matters when u perform SD Speed test in your phone. If you are using CM7 ROM, the default is a mere 128kb cache.
Cache size of SD can be from 128kb to 4096kb and different sd cards will perform better/worst with different cache sizes.
Just thought it would be a good info to share.

why is it that im getting two diff figures when i test my card with antutu and sd tools?
sd tools - read 33MBs
write 6.1MBs
antutu read 10MBs
write 2.6MBs
something doesnt add up
sd read is 2046 default on miui rom
my card is a ridata 8gb class 10
which figure could be correct?

temasek said:
Your SD Cache size matters when u perform SD Speed test in your phone. If you are using CM7 ROM, the default is a mere 128kb cache.
Cache size of SD can be from 128kb to 4096kb and different sd cards will perform better/worst with different cache sizes.
Just thought it would be a good info to share.
Click to expand...
Click to collapse
This is sort of true, but if it was a mere cache it would always be a good idea to set it as large as you can afford RAM-wize. This is not the case.
It is a read-ahead cache. In short that means that whenever a read is requested, it first checks the cache to see if the data is already there, if not it reads the amount of bytes specified no matter what.
Increasing the read-ahead cache will help when reading large files, since it leads to fewer (actual) io-commands being executed.
However, if you're reading a lot of small files it will hurt performance, since for every read issued it will read a lot of unnecessary data before it can go on to the next request.
(I also think this is at a block-level, which means that it merely reads the next blocks, not knowing if they actually belong to the file you're reading at the moment, but not sure about that.)

Hey guys..
Just format your sd cards to 32KB. This i did to my Optimus Black and saw big difference

yannisb99 said:
Hey guys..
Just format your sd cards to 32KB. This i did to my Optimus Black and saw big difference
Click to expand...
Click to collapse
If use 8G↓ , then set cluster to 32K.
If use 16G↑, then set cluster to 64K.
Test it!

Poor andronench scores. Should I exchange my tf701?

I just got my new tf701. It's running stock android 4.2.2. The Androbench micro scores are worse than my old Transformer Prime. I thought the tf701 didn't have poor performing internal sd like the tfp did. What are your scores? Should I exchange it?
Here're my tf701 Androbench micro test scores:
Sequential Read: 67.12 MB/s
Sequential Write: 14.37 MB/s
Random read: 7.21 MB/s, 1846.66 IOPS (4K)
Random write: 0.82 MB/s, 209.94 IOPS (4K)
SQLite scores:
Insert: 68.15 TPS, 4.4 sec
Update: 85.03 TPS, 3.52 sec
Delete: 82.94 TPS, 3.61 sec
all of them are below the Transformer Prime's.
Sent from my SAMSUNG-SM-N900A using Tapatalk

hello
i just ran mine i got similar results. i think it is wrong as i copy between tab and sd often and copies faster than that result much faster.
i got rand write 1.2
rand read 36.8
no reboot for days.
i ran on 3.2 and remember much higher
so it may be firmware
i wonder what the custom rom that is out gets
anyway it seems like next update may be 3.4 so lets hope its polished.
im happy with performance and since update i have not got garbled screen.
the dock though is still **** and it seems to drain the batt faster when docked then undocked
though havinf a 64gb sd card may cause extra drain?

malos1984 said:
hello
i just ran mine i got similar results. i think it is wrong as i copy between tab and sd often and copies faster than that result much faster.
i got rand write 1.2
rand read 36.8
no reboot for days.
i ran on 3.2 and remember much higher
so it may be firmware
i wonder what the custom rom that is out gets
anyway it seems like next update may be 3.4 so lets hope its polished.
im happy with performance and since update i have not got garbled screen.
the dock though is still **** and it seems to drain the batt faster when docked then undocked
though havinf a 64gb sd card may cause extra drain?
Click to expand...
Click to collapse
Thanks. I feel better. I hope more members can post about their AndroBench results.
My TF701 is not running slow. I just want to make sure I don't get a defective one.
I have owned a Transformer Prime (TF201) for a couple of years. TF201 is notorious for having slow internal SD. I ran custom ROMs that had Data2SD. The current ROM on it is Voyager2K's Paranoid 3.99. I don't use Data2SD on it anymore even though that's an option. The reason is my AndroBench scores are excellent without Data2SD, big improvements from the beginning, esp the writes. I don't know what Voyager2k did to make his ROM improve on SD speeds. But the OS itself can obviously make the difference.
My TF201 with stock 4.x ROM:
Sequential Read: 18.07 MB/s
Sequential Write: 3.85 MB/s
Random read: 5.25 MB/s, 1345.42 IOPS (4K)
Random write: 0.21 MB/s, 55.82 IOPS (4K)
The writes are much better even though the reads are not as good
My TF201 with PA ROM 3.99 w/o Data2SD:
Sequential Read: 13.3 MB/s
Sequential Write: 159.77 MB/s
Random read: 4.86 MB/s, 1246.38 IOPS (4K)
Random write: 160.58 MB/s, 41109.08 IOPS (4K)
The writes are much better even though the reads are not as good

bklm1234 said:
Thanks. I feel better. I hope more members can post about their AndroBench results.
My TF701 is not running slow. I just want to make sure I don't get a defective one.
I have owned a Transformer Prime (TF201) for a couple of years. TF201 is notorious for having slow internal SD. I ran custom ROMs that had Data2SD. The current ROM on it is Voyager2K's Paranoid 3.99. I don't use Data2SD on it anymore even though that's an option. The reason is my AndroBench scores are excellent without Data2SD, big improvements from the beginning, esp the writes. I don't know what Voyager2k did to make his ROM improve on SD speeds. But the OS itself can obviously make the difference.
My TF201 with stock 4.x ROM:
Sequential Read: 18.07 MB/s
Sequential Write: 3.85 MB/s
Random read: 5.25 MB/s, 1345.42 IOPS (4K)
Random write: 0.21 MB/s, 55.82 IOPS (4K)
The writes are much better even though the reads are not as good
My TF201 with PA ROM 3.99 w/o Data2SD:
Sequential Read: 13.3 MB/s
Sequential Write: 159.77 MB/s
Random read: 4.86 MB/s, 1246.38 IOPS (4K)
Random write: 160.58 MB/s, 41109.08 IOPS (4K)
The writes are much better even though the reads are not as good
Click to expand...
Click to collapse
I don't trust those scores. Sounds like fsync might be off in which case you can forget the write scores being reliable.

why are my random write speeds so low?

4x-5x slower than what benchmarks usually show for this model!
What are your speeds?

Random Write: 25,89 MB/s 6627.94 IOPS
Xiaomi.eu 11.0.5.0 Stable + QuaxV3
I guess it is normal speed.

droog. said:
Random Write: 25,89 MB/s 6627.94 IOPS
Xiaomi.eu 11.0.5.0 Stable + QuaxV3
I guess it is normal speed.
Click to expand...
Click to collapse
But check out these figures from a review. Strangely the ones on op7 are lower :silly:

Here's mine

sofir786 said:
Here's mine
Click to expand...
Click to collapse
Good scores on random write & sql tests too!
I don't know what's buggy in my system..getting low recently.. Especially abysmally low on sql! :crying:
(I/o = NOOP @1024kb read ahead)

nakulp said:
4x-5x slower than what benchmarks usually show for this model!
What are your speeds?
Click to expand...
Click to collapse
I just tested and here are my speeds:
P. S. I have Mi 9T Pro 6/128GB on MIUI 11 global.

MnMchill said:
I just tested and here are my speeds:
P. S. I have Mi 9T Pro 6/128GB on MIUI 11 global.
Click to expand...
Click to collapse
That's good !
I think I'm having low scores because of less free space (nand speeds affected by amount of free space) = just 24GB/128GB
May I ask how much of free space were you having arm of the test?

nakulp said:
That's good !
I think I'm having low scores because of less free space (nand speeds affected by amount of free space) = just 24GB/128GB
May I ask how much of free space were you having arm of the test?
Click to expand...
Click to collapse
You're right, I have lot of free space(check picture in attachment).

Am I blessed with a special phone? I wonder why my sequential write is that high..

whitelub said:
Am I blessed with a special phone? I wonder why my sequential write is that high..
Click to expand...
Click to collapse
Blessed you are indeed! Free space?

nakulp said:
Blessed you are indeed! Free space?
Click to expand...
Click to collapse
Available 39gb Total 64gb

I had 24MB/s on Random Write with EXT4. I formatted the data partition to F2FS and now i got 150MB/s on random write.

Question UFS version

UFS version of the Edge 20 is 3.1???

joi.est said:
UFS version of the Edge 20 is 3.1???
Click to expand...
Click to collapse
Hope so

2.1

Use 2.1 but good quality. Its sequential read speed is almost 600MB/s and its sequential write speed is almost 300MB/s.

Enough for downloads. My internet is slowly, just 400MBit/s or 50MB/s. So we have reserves for 6 times faster internet or WiFi transfer over ax