Database Info

running App on SD closes down when power on

Does anyone know how to get around this problem.
I have apps installed on the SD and when the Uni is switched ON, the app will close.
Tomal states that "It is because of the PM for SD. Also, latest kernel's are very "efficient"" and has suggested disabling Power Management for SD. This didn't fix it for me.
Has anyone any suggestions or fixes? Or perhaps this doesn't effect all SD cards (mine's a class 6 8GB)
(NB. I started a new thread as this is not a problem with Tomal's ROM, but seems to be a WM6.x 'feature').

JonMorgan said:
Does anyone know how to get around this problem.
I have apps installed on the SD and when the Uni is switched ON, the app will close.
Tomal states that "It is because of the PM for SD. Also, latest kernel's are very "efficient"" and has suggested disabling Power Management for SD. This didn't fix it for me.
Has anyone any suggestions or fixes? Or perhaps this doesn't effect all SD cards (mine's a class 6 8GB)
(NB. I started a new thread as this is not a problem with Tomal's ROM, but seems to be a WM6.x 'feature').
Click to expand...
Click to collapse
Hi jon,
I've just tested it in 3 different SD cards.
Result is interesting: running application do not get closed for 2 of them but it is the same of you for another card!
Affected one is a 4GB SD, it is a non-branded card.
Hope this information helps.

Ah now this is interesting. I usually use SD Settings Type I for my card (I get better benchmark results). But in switching to Type II I now don't have the aformentioned problem.
Code:
measurements in ms Type-I Type-II
Write 1MB file 2370 6226
Read 1MB file 998 1502
Copy 1MB file to card 1156 5926
Copy 1MB file from card 2045 2773
Write 10k x100 files 6772 10490
Read 10k x100 files 1179 1579
Copy 10k x100 files to card 5778 10610
Copy 10k x100 files from card 4528 8913
Directory list of 2000 files 209 203
(using spb benchmark 1.6.0)
However, I really don't want this fix to be the only solution, as you can see the card runs a lot slower with Type-II settings
Anyone can test this out on their card... what is your card? Mine is veho 8GB class 6. [nb, ask me if you are interested in spb benchmark to test]

help with apps2sd menu lag.

Ok I have jf 1.5 and a 4gb class 4 memory card.
I used the apps2sd app(the first release) to move my apps to the sd card and everything was working smoothly. I installed maybe about 80 apps and my internal memory plummeted to 32 mb. So then I used the other button on the apps2sd app and moved my dalvik-cache to sd and I gained like 30mb. But now everytime I open the menu there's like a 4-8 second lagg for my icons to pop out. I want to know if there's anything I can move back to the phone that will bring my menu open speed back to normal. Is this possible? Or am I gonna have to reflash my phone and just move my apps and no caches? Or is this just part of me having a class 4 memory card. Cus I know people that have a class 4 and they suffer no performance decrease.
Thanks.
Djbootleg

Can anyone help me out?
Idk what to do.

Wipe----Flash----then use busybox to re-link your apps....
I had to dot hat to my friends phone with a class 2 card and now it works fine.
BTW get a class 6 card they are not that expensive

Is there any command to like move back whatever is decreasing performance?

atlmatt said:
Wipe----Flash----then use busybox to re-link your apps....
I had to dot hat to my friends phone with a class 2 card and now it works fine.
BTW get a class 6 card they are not that expensive
Click to expand...
Click to collapse
How do you re-link with busybox? Cheers.

http://android-dls.com/wiki/index.php?title=Haykuro_Apps_to_SD
Just follow the entire busybox directions and you will be fine...

You should be using a class 6 card and not a class 4. The slowdown is likely related to the slow read speed of class 4.

Rekna said:
You should be using a class 6 card and not a class 4. The slowdown is likely related to the slow read speed of class 4.
Click to expand...
Click to collapse
so you think i should just reflash my phone and just get a class 6 and then move my caches??

bootleg16 said:
so you think i should just reflash my phone and just get a class 6 and then move my caches??
Click to expand...
Click to collapse
Try to get the Paragon Partition Manager. You can make an exact replica of
your sd card on a faster one, and don't have to reflash or wipe!

Try this:
http://forum.xda-developers.com/showthread.php?t=512743

Anyone try this SD Card speed hack on the x10?

I wonder if this would work on the x10, anyone try it?
http://forum.xda-developers.com/showthread.php?t=1010807
UPDATE:
svtfmook has the info on how to do this via scriptmanager here
http://forum.xda-developers.com/showthread.php?t=1013554

Bialynia said:
I wonder if this would work on the x10, anyone try it?
http://forum.xda-developers.com/showthread.php?t=1010807
Click to expand...
Click to collapse
there is app for this in the market. i use it to speed up my sd card reading

i tried manually applied it but failed.. lol. use the apps sdcard booster instead.. working fine.. noticeable speed increase.

Crocodile1973 said:
there is app for this in the market. i use it to speed up my sd card reading
Click to expand...
Click to collapse
I'm running 2.1 rooted, the market app is 2.2 and above, won't show up for me.

u can try manually apply it.
/sys/devices/virtual/bdi/17:1/read_ahead_kb
change the value inside the read_ahead to 2048 or 3072
the italic, im nt sure its 17:1 or 17, something bout 17 im sure. inside got the read ahead
tis method however, change back to default after reboot

I tried the hack. Changed cache size from 128 to 2048. Write speeds stayed the same, but read speeds went up by about 5Mb/s. My SD card is crap tho, only a class 2. I also only tried the one cache size.

How big of a difference is noticeable between class 2 and class 6?........thinkin bout gettin rid of my class 2 16g if it makes a big improvement
Sent from my X10 using XDA App

Pretty noticeable, using a class 6 16gb increases all data retrieval speed eg contacts, pictures, apps on SD etc. Defo worth it.
Sent from my X10i using XDA App

Thanks...grabbing one today.....haha on sale for $30...... cant go wrong
Sent from my X10 using XDA App

any solution for this on GENERIC X10i 2.1.1.A.0.6 ??

Using app on froyo 2.2 phone feels smoother
Sent from my X10i using XDA Premium App

I have set it up to 2048 and it i have see a large affect of the speed of sd card.... But when my device reboot it is again at 128....Any idea to set it up permantely ?

pficrx said:
I have set it up to 2048 and it i have see a large affect of the speed of sd card.... But when my device reboot it is again at 128....Any idea to set it up permantely ?
Click to expand...
Click to collapse
Using the app i can set at boot
Sent from my X10i using XDA Premium App

there is no init.d on stock x10, so i set the file "99sdcardreadfix" to "run as root" and "run at boot" with "script manager" (free available at market).
The code working for me:
Code:
#!/system/xbin/sh
if [ -e /sys/devices/virtual/bdi/179:0/read_ahead_kb ]
then
/system/xbin/echo "[COLOR="Red"]3072[/COLOR]" > /sys/devices/virtual/bdi/179:0/read_ahead_kb;
fi
3072 was working best for me with the stock sd card.
read: 3,8
write: 73,4
If another value works better with your sd card, just change the red number to what you need

My best results
I have a SA32G (32GB) and the best results i got where with the buffer at 3456KB. Let me know if that works for anyone and if you find it helped let me know with a quick click on the 'thanks' button!
@Eisel89 Whats the ending on the 99sdcardreadfix? is it just a .bat? thanks

pp085ster said:
I have a SA32G (32GB) and the best results i got where with the buffer at 3456KB. Let me know if that works for anyone and if you find it helped let me know with a quick click on the 'thanks' button!
@Eisel89 Whats the ending on the 99sdcardreadfix? is it just a .bat? thanks
Click to expand...
Click to collapse
there is no ending to this file.
simply 99sdcardreadfix without dot and ending

i posted this in the general forum last week
http://forum.xda-developers.com/showthread.php?t=1013554
for 2.2 roms, you need to edit the script because echo is in bin, not xbin
download and use scriptmanager from the market, it will allow the script to run at boot.
works great on my 2.1 and 2.2 roms.
devs are not including this in their roms and no scripts are needed.

Thanks! That really did the trick for me, I am set at 1024 now, read speeds went up slightly between 6-7 mb/s while read speeds are around 25mb/s. I could get higher read speeds at higher cache but my write speeds would go down

thread carefully
Hi
I just wanted to point out that read ahead buffer is not a real SD card performance booster. It is the way how your OS handles card reading and buffering data. I agree that illusion of speedup is present and large data set can really benefit from big read ahead buffer (like video audio and some others).
If you try other SD speed test applications like "Sst" aka "SD Card Speed Test" changing read ahead buffer will not make a dent because software is not using buffers to test real performance.
In some cases big buffer can really degrade performance because OS is cashing something that was not needed.
So my advice is to thread carefully and make read ahead buffer bigger only if you suffer from dropped frames in video or audio players, games and if you use app2sd.
Real performance boost can only obtained with better SD card driver if possible (custom kernel) and better SD card class 6 if possible. (not all SD card's regardless of class will not work in your device as expected eg. Kingston SanDisc Apacer and others research before you buy)
Kradovan

kradovan said:
Hi
I just wanted to point out that read ahead buffer is not a real SD card performance booster. It is the way how your OS handles card reading and buffering data. I agree that illusion of speedup is present and large data set can really benefit from big read ahead buffer (like video audio and some others).
If you try other SD speed test applications like "Sst" aka "SD Card Speed Test" changing read ahead buffer will not make a dent because software is not using buffers to test real performance.
In some cases big buffer can really degrade performance because OS is cashing something that was not needed.
So my advice is to thread carefully and make read ahead buffer bigger only if you suffer from dropped frames in video or audio players, games and if you use app2sd.
Real performance boost can only obtained with better SD card driver if possible (custom kernel) and better SD card class 6 if possible. (not all SD card's regardless of class will not work in your device as expected eg. Kingston SanDisc Apacer and others research before you buy)
Kradovan
Click to expand...
Click to collapse
gallery loads faster, access times are reduced, it's not an illusion and it is an improvement without sacraficing anything else.

[Q] SD Card Speed/Class Matters!!??

Hello Guyz. This is my first post on any kind of forum and let me go to my problem straight away.
I am using HTC Pico (Explorer) for the last one and half month or so. Obviously the problem is low internal memory. Have tried as many roms as possible to overcome this issue. Found JaggyRom 3.2.1 most suitable when using a2sdgui script and tried installing as many apps as possible. But there is also limit to it. I also tried other CM9/ICS/JB roms out there with int2ext/d2ext+ scripts to actually increase internal memory to 1GB. Even today, I tried Sense 4.0A Build#2 Ver 3 Final, but ultimately they're installed work fine from dev's point of view but my phone is dead slow n I recieve FC msgs alot.
Now my point is that I need to have a look of either ICS or Sense 4.0 but with greater internal memory. Dev guyz are doing great job facilitating nerds like me, but both of the above roms tend to make my phone dead SLOW and I get FC messages a lot many times, since all the data is moved to SD-EXT. Developers have claims of running these roms smooth, but plz put me wise here in this issue. I just wanted to ask a simple question:
1. Does my SD card's speed/class really matters? (btw I've 2GB microSD with 1GB SD-EXT partition, and I don't know its speed/class )
2. My HTC Explorer is rooted, super user capable (as I've learned alot during this one n a half month to do this )
3. Please suggest me what to do here (actually I'm tired of flashing ROMS now )
Regards.

1. The higher class is, the faster sd card is.
2-3. I'm on cm9 build #8(too lazy to update it ) with sdcard a-data class 10 with 1GB external partition using mounts2sd. Working fine .
Sent from my HTC Explorer A310e using xda app-developers app

Well, the answer to your question is kinda hard to understand, please read it carefully, as I spent time typing it here .
1/ Yes, card speed really matter, but it's not the class that matter. Class rating is for sequential write speed. For Android, what matters is random small-burst write speed. Read the first post of this thread http://forum.xda-developers.com/showthread.php?t=1005633. To successfully utilize your card, you must understand what you want to put on it.
An Android app normally have 3 parts: app (main apk), dalvik-cache, and data (your app's data like account, save game). app and dalvik will make use of sequential write/read speed, but data will benefit from random small-burst read/write speed.
Your internal memory is optimized for both type of read/write (that's why they're expensive like hell), while normally, SD cards are optimized for sequential read/write. Read again about the scripts you use, you will find that scripts that seem suitable for you have: app & dalvik on SD, data on internal. With data on internal, you will have a limit, because some apps use a lot of space for data.
Those scripts that make your internal memory become 1GB simply mount the SD-ext partition as internal memory, so everything is on SD cards, and the slow random write speed cripples your system.
Your best bet now is to try some configurable script like m2sd (I personally highly recommend it), have some patient setting it up, with app and dalvik on SD, leave data on internal, and you're good to go.
Use this link http://forum.xda-developers.com/showthread.php?t=1342387 to learn about m2sd if you're interested.
You should consider buying a fast card like Sandisk Ultra, they're not expensive. Remember to go with Sandisk (class 6 and up) when you're with Android. Some people also report that Samsung cards have great random write speed, and they're on sale more often than Sandisk (just avoid the Plus series). When you buy cards, always look for some benchmark about it's random 4k write speed.
And even with a fast card, I think you should still leave data on internal, data on SD put a heavy burden on your card, which can decrease it's lifespan soon.
I hope you read to this line, the post cost me more than 30 minutes . I just want to help :highfive:.
I attached the m2sd zip that I am using. And if you trust me, try MiniCM9 http://forum.xda-developers.com/showthread.php?t=1958152, it's great. Use it with Nova launcher, and you will be amazed at the smoothness that our weak phone can deliver :highfive:.

I think you should use Nextgen rom because it had mount2sd script preconfigered and you wont have any problem
Sent from my HTC Explorer powered by Nextgen v1.5

Awesome Reply!!
redguardsoldier said:
Well, the answer to your question is kinda hard to understand, please read it carefully, as I spent time typing it here .
1/ Yes, card speed really matter, but it's not the class that matter. Class rating is for sequential write speed. For Android, what matters is random small-burst write speed. Read the first post of this thread http://forum.xda-developers.com/showthread.php?t=1005633. To successfully utilize your card, you must understand what you want to put on it.
An Android app normally have 3 parts: app (main apk), dalvik-cache, and data (your app's data like account, save game). app and dalvik will make use of sequential write/read speed, but data will benefit from random small-burst read/write speed.
Your internal memory is optimized for both type of read/write (that's why they're expensive like hell), while normally, SD cards are optimized for sequential read/write. Read again about the scripts you use, you will find that scripts that seem suitable for you have: app & dalvik on SD, data on internal. With data on internal, you will have a limit, because some apps use a lot of space for data.
Those scripts that make your internal memory become 1GB simply mount the SD-ext partition as internal memory, so everything is on SD cards, and the slow random write speed cripples your system.
Your best bet now is to try some configurable script like m2sd (I personally highly recommend it), have some patient setting it up, with app and dalvik on SD, leave data on internal, and you're good to go.
Use this link http://forum.xda-developers.com/showthread.php?t=1342387 to learn about m2sd if you're interested.
You should consider buying a fast card like Sandisk Ultra, they're not expensive. Remember to go with Sandisk (class 6 and up) when you're with Android. Some people also report that Samsung cards have great random write speed, and they're on sale more often than Sandisk (just avoid the Plus series). When you buy cards, always look for some benchmark about it's random 4k write speed.
And even with a fast card, I think you should still leave data on internal, data on SD put a heavy burden on your card, which can decrease it's lifespan soon.
I hope you read to this line, the post cost me more than 30 minutes . I just want to help :highfive:.
I attached the m2sd zip that I am using. And if you trust me, try MiniCM9 http://forum.xda-developers.com/showthread.php?t=1958152, it's great. Use it with Nova launcher, and you will be amazed at the smoothness that our weak phone can deliver :highfive:.
Click to expand...
Click to collapse
That is a great and dedicated reply ..... thanks redguardsoldier . Moreover I didn't understand the part where u say 4k write speed!! Don't these microSD cards write at speeds of 2 to 10 MB/s??? Or you are talking about random short read/write bursts!!!!
And as per your guidelines this what I have to do:
1. Buy a fast cast like Sandisk Ultra class 6 or up (I hope its microSD and not microSDHC kinda thing!!) or Samsung (except Plus series)
2. Use the m2sd script.
3. Use the following settings:
a. "data" on INTERNAL
b. "app" & "dalvik" on SD (and by SD you mean SD-EXT!!!)
4. And use miniCM9 though
I again appreciate your concern and grateful for taking out some of your precious time. Hope to listen from you again :good:
Regards

vikingmax said:
That is a great and dedicated reply ..... thanks redguardsoldier . Moreover I didn't understand the part where u say 4k write speed!! Don't these microSD cards write at speeds of 2 to 10 MB/s??? Or you are talking about random short read/write bursts!!!!
And as per your guidelines this what I have to do:
1. Buy a fast cast like Sandisk Ultra class 6 or up (I hope its microSD and not microSDHC kinda thing!!) or Samsung (except Plus series)
2. Use the m2sd script.
3. Use the following settings:
a. "data" on INTERNAL
b. "app" & "dalvik" on SD (and by SD you mean SD-EXT!!!)
4. And use miniCM9 though
I again appreciate your concern and grateful for taking out some of your precious time. Hope to listen from you again :good:
Regards
Click to expand...
Click to collapse
4k random write speed mean the speed that the card is capable of writing small blocks of 4kB each at random location . I talked about "random short read/write bursts" :good:.
About the microSD/SDHC/SDXC, that's just the type of size . It makes me confused at first :highfive:. Well, a long time ago, when cards are just 256MB, or 1GB each, they are microSD. microSD have the maximum size of 2GB. When the 4GB cards come out, they are called SDHC . And now, those hugh 32GB and 64GB cards are called SDXC.

redguardsoldier said:
4k random write speed mean the speed that the card is capable of writing small blocks of 4kB each at random location . I talked about "random short read/write bursts" :good:.
About the microSD/SDHC/SDXC, that's just the type of size . It makes me confused at first :highfive:. Well, a long time ago, when cards are just 256MB, or 1GB each, they are microSD. microSD have the maximum size of 2GB. When the 4GB cards come out, they are called SDHC . And now, those hugh 32GB and 64GB cards are called SDXC.
Click to expand...
Click to collapse
Thanks for your reply.. Helped me a lot too. What are your views on int2ext + or ungaze scripts?
Sent from my HTC Explorer A310e using xda premium

Samsung 64GB SD Card - SO SLOW

So I ordered a Samsung 64GB Class 10 micro SD card, and it seems VERY slow.
While I gone so much mind the slowness, as I dont play a lot of games and would use it more for pictures and music I was wondering if I could get a few questions answered before I send it back or just give it to someone else.
1: Does the S4 have problems with 64GB cards?
- I am running Sacs KitKat V2
2: should I format with a format (NSFT/exFat) and is it better done on a Mac or PC?
3: what should the Unit Size be?
4: I just copied my old sd card on to this one, and some of the big games I do have stopped showing up. but when I put my old card back in, they are there again.
Why would this happen?
Thanks for the help everyone!

You have to format the card using the phone itself. Go into settings then storage and the option should be there. Try that, then re-copy your stuff to the card. If you still have problem then it is probably a dud card.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app

You shouldn't re-format it at all from stock, but if you do you should try the official SD Formatter: https://www.sdcard.org/downloads/formatter_4/
I have a samsung 64GB microsd in my S4 and it's ridiculously fast according to SD Tools (http://i.imgur.com/EXUVIP7.png), probably a caching causing that; but anyways, it's great in normal use copying roms over/etc.

Oishikatta said:
...probably a caching causing that
Click to expand...
Click to collapse
LOL, you don't say! Divide those numbers by 10 and you have a more realistic speed indication :good:

Pfeffernuss said:
LOL, you don't say! Divide those numbers by 10 and you have a more realistic speed indication :good:
Click to expand...
Click to collapse
No, samsung does claim the card gets 70MB/s read and 20MB/s write - and the reviews on amazon match that even for the lower priced card:
http://www.amazon.com/Samsung-64GB-PLUS-Micro-Adapter/dp/B00I4ZMNY4/
Obviously the SD Tools benchmark isn't testing the actual card performance, but what matters is that in actual use the samsung cards are great.
Windows/crystaldiskmark can also easily be used to do a real test.
Here's in a usb 2.0 card reader:
Sequential Read : 23.455 MB/s
Sequential Write : 17.352 MB/s
Random Read 512KB : 22.898 MB/s
Random Write 512KB : 16.407 MB/s
Test : 100 MB [D: 32.1% (18.8/58.5 GB)] (x5)
Date : 2014/03/26 11:16:15
OS : Windows 8.1 [6.3 Build 9600] (x64)
If @chaos67731 isn't getting at minimum 10-20MB/s after formatting the card then there's probably something wrong with it.

chaos67731 said:
1: Does the S4 have problems with 64GB cards?
- I am running Sacs KitKat V2
2: should I format with a format (NSFT/exFat) and is it better done on a Mac or PC?
3: what should the Unit Size be?
4: I just copied my old sd card on to this one, and some of the big games I do have stopped showing up. but when I put my old card back in, they are there again.
Click to expand...
Click to collapse
1: A good amount of users (including me) had problems with their SD cards on S4s. The problems are between:
occasional unmount/remount (the system does this for no apparent reason). S4 cant read cards after a sudden unmount, and cards usually get killed. most of the cards reported are 16,32 and 64 GB micro SD kingstone. SandDisk has problems too but I'm not sure about Samsung's.
2: Just use the official SD formatter mentioned by @Oishikatta above.
3: if you used the official SD formatter you wont have to deal with Unit Size. (personally, I dont know what's that)
4: Do you use a card reader when you copy your memory card? or do you just connect the phone using a cable? try using a card reader when copying your SDs. Some hidden files may not appear if you used the cable.
I hope I helped and excuse my English, its not my native language.

Well if you have a SanDisk they want you to format exfat. http://kb.sandisk.com/app/answers/d...sion/L3RpbWUvMTM5NTg5ODI5OS9zaWQvRDdTTFVmUWw=

Oishikatta said:
No, samsung does claim the card gets 70MB/s read and 20MB/s write.
Click to expand...
Click to collapse
Sure, on a PC with an appropiate very fast SD-card reader. Using a phone you won't get those advertized speeds.
This is the result with a more proper SD-benchmarking app (although internal and external SD are shown in reverse):
These values will be more realistic. SD-Tools results (cached) don't mean jack, unfortunately.