Database Users

Nand + SD = raid0?

Here's an idea.
We use additional EXT partition on our SD cards to extend memory of 512MB Leos.
Why not turning it into a RAID matrix?
I use software RAID on my desktop Linux, why not here?
I'm not sure if its even possible.
It also might actually slow down the devices because of the differences between both memories, but it's worth a try, isn't it?
Any one skilled and willed enough to do this?

tomus said:
Here's an idea.
We use additional EXT partition on our SD cards to extend memory of 512MB Leos.
Why not turning it into a RAID matrix?
I use software RAID on my desktop Linux, why not here?
I'm not sure if its even possible.
It also might actually slow down the devices because of the differences between both memories, but it's worth a try, isn't it?
Any one skilled and willed enough to do this?
Click to expand...
Click to collapse
Well, RAID0 would require both volumes to be the same size, or it will cap it to the size of the smallest one. So the best you could get would be 1024 for EU, 2048 for US.
So, how about you start begging Cotulla for the MAGLDR source (or find some way to implement it into Android) and dedicate the next two years to it Nothing is impossible, but it definitely isnt plausible.

I'm not sure what are the differences between the desktop Linux kernel and the Android one (I actually think they are the same with some addons, can anyone clarify on that?), but there is support for software RAID in the Linux kernel. We could create a system partition in NAND, another one of the same size on SD and "software-RAID them up" Whole matrix is being assembled during init, so no need for any low level code.
I guess we would need some initrd, or non-RAID boot partition with kernel...
It would also require to build matrix and filesystem on the device (instead of flashing already pre-created one) or flashing both NAND memory and RAID partition on the SD card...
Also software RAID impacts the CPU performance on IO. I'm very curious how it would run
Talking about desktop kernel... Maybe I should try in the Ubuntu section? ;P

tomus said:
I'm not sure what are the differences between the desktop Linux kernel and the Android one (I actually think they are the same with some addons, can anyone clarify on that?), but there is support for software RAID in the Linux kernel. We could create a system partition in NAND, another one of the same size on SD and "software-RAID them up" Whole matrix is being assembled during init, so no need for any low level code.
I guess we would need some initrd, or non-RAID boot partition with kernel...
It would also require to build matrix and filesystem on the device (instead of flashing already pre-created one) or flashing both NAND memory and RAID partition on the SD card...
Also software RAID impacts the CPU performance on IO. I'm very curious how it would run
Talking about desktop kernel... Maybe I should try in the Ubuntu section? ;P
Click to expand...
Click to collapse
A RAID Partitioning would be great if we would use it like WP7 (which i have tested for a week), its working great but if i remember what wp7 does, if you remember the sdcard (you MUST reflash Wp7 to get everything to work again) it would be less attractive than before.... :/

Sounds like you want JBOD (which isn't really raid, but related, and usually implemented in the raid tools), and it's not required to have same size disks. If it's possible to implement, you could then add on a 32g SD card onto the built-in NAND to create a 33g virtual NAND(TMOUS).
http://en.wikipedia.org/wiki/Non-RAID_drive_architectures

[Q]What's the different between (512Mb & 1Gb) data file running Android from sdCard??

[Q]What's the different between (512Mb & 1Gb) data file running Android from sdCard??
Good day everybody,
I just want to know [Q]What's the different between (512Mb & 1Gb) data file running Android from sdCard??
because I'm having problems with running the MDJ FroYo HD v.4.6 in 512 Mbyte HTC HD2 version, such as;
- freezing
- slow movement while browsing the menu
- can't access the Market where it always saying that the username or password is wrong
while the same Android ROM is running smoothly on the T-Mobile HD2 version without any single problem and very fast.
both phones, the T-Mobile HD2 version and the HTC HD2 512Mbyte version are updated to the latest Radio (2.15.50.14) and Microsoft Windows 6.5 ROM (3.14.531.1)
any hints??

512Mb & 1Gb data files are simply the amount of space u'll be taking off d sd card for android apps & data installations...So d bigger,d more space you'll have for your android and less space on your sd card for things like music, ebooks, images etc...
IMHO....1GB & above is highly recommended so u don't have low memory issues after tossing android on your sd card..This is cuz u might end up needing more apps & some apps lyk high-end games do tk up a lot of space.
As for speed differences between the two Leos...Well d TMobile Hd2's more buffed up and so..........U might want 2 try lighter android builds cuz d HD versions are some what heavier....Also your choice of Memory card class & capacity also helps...i'd recommend an 8GB Class (4)...

The Data.img isnt your problem anyway your problem is that you are trying to use a very old and outdated rom that was never very good to begin with

ZeroNEX said:
Good day everybody,
I just want to know [Q]What's the different between (512Mb & 1Gb) data file running Android from sdCard??
because I'm having problems with running the MDJ FroYo HD v.4.6 in 512 Mbyte HTC HD2 version, such as;
- freezing
- slow movement while browsing the menu
- can't access the Market where it always saying that the username or password is wrong
while the same Android ROM is running smoothly on the T-Mobile HD2 version without any single problem and very fast.
both phones, the T-Mobile HD2 version and the HTC HD2 512Mbyte version are updated to the latest Radio (2.15.50.14) and Microsoft Windows 6.5 ROM (3.14.531.1)
any hints??
Click to expand...
Click to collapse
hi
what kernel do you use?
try the hastarin 8.6 kernel. i used to have similar problems (i mean laggy phone) and the kernel kind of sorted it out (i use the same android build as you do). maybe it'll help you (i don't know if it's gonna help market problem but i think 'freezing' might be cured)

voncrane said:
512Mb & 1Gb data files are simply the amount of space u'll be taking off d sd card for android apps & data installations...So d bigger,d more space you'll have for your android and less space on your sd card for things like music, ebooks, images etc...
IMHO....1GB & above is highly recommended so u don't have low memory issues after tossing android on your sd card..This is cuz u might end up needing more apps & some apps lyk high-end games do tk up a lot of space.
As for speed differences between the two Leos...Well d TMobile Hd2's more buffed up and so..........U might want 2 try lighter android builds cuz d HD versions are some what heavier....Also your choice of Memory card class & capacity also helps...i'd recommend an 8GB Class (4)...
Click to expand...
Click to collapse
Thanks for the reply, so does it mean that I will have only a 1 GB in the sdCard dedicated for Android and all applications from the market???
I mean if I move the apps & games I downloaded from market to the sdCard using the Manage Applications under setting menu, will it make any diffrence???
Thanks

wrecless said:
The Data.img isnt your problem anyway your problem is that you are trying to use a very old and outdated rom that was never very good to begin with
Click to expand...
Click to collapse
Thsnks for the reply, but it's not helping as I said in the first post
" I'm running the same version of this ROM in more than one T-Mobile HD2s and all of them run very smoothly without any problems"
Then how it works in the T-mobile smootly but not in the 512Mbyte version ???

emjakmaciej said:
hi
what kernel do you use?
try the hastarin 8.6 kernel. i used to have similar problems (i mean laggy phone) and the kernel kind of sorted it out (i use the same android build as you do). maybe it'll help you (i don't know if it's gonna help market problem but i think 'freezing' might be cured)
Click to expand...
Click to collapse
Aha, here we go somebody with the same problem
Yes it might be the kernal, the kernal in the phone shows these lines:
2.6.32.15.s8.0-gf06973d-dirty
[email protected]#10
Mon Dec 13 17:53:37 KART 2010
And I do remember that when I un-rar the ROM file, there was a kernal folder but I didn't use it because I don't know how!!!
Whould you please upload me the kernal you're using or give me the link you download it from??
Would some tell me how to install the new kernal ???
Regarding the Market issue, just don't worry about it " I was entering the wrong pass " Many thanks

ZeroNEX said:
Thsnks for the reply, but it's not helping as I said in the first post
" I'm running the same version of this ROM in more than one T-Mobile HD2s and all of them run very smoothly without any problems"
Then how it works in the T-mobile smootly but not in the 512Mbyte version ???
Click to expand...
Click to collapse
Swap the SD cards between the phones and try again.
If it follows the SD Card (and you're sure the setup is EXACTLY the same) it's your SD
It could be a bad SD or you may just have to delete/recreate the partition and format it.
Your phone are also different. I'm not sure it's just the mem size, some chip could be differents, drivers...

ZeroNEX said:
Thanks for the reply, so does it mean that I will have only a 1 GB in the sdCard dedicated for Android and all applications from the market???
I mean if I move the apps & games I downloaded from market to the sdCard using the Manage Applications under setting menu, will it make any diffrence???
Thanks
Click to expand...
Click to collapse
Yes u'll have only 1GB dedicated to android and all apps...By this i mean it'll show up as available "phone" memory (just think of it as a virtual drive but in reality it takes physical space 4rom ur sd card)...I.e..using an 8GB mem card? Phone storage will read 1024MB while SD storage will read abt 6.xxGB...
Yes, if u move apps 2 sd it'll mk a difference but i think 1Gb is enuf for apps and u don't really need 2 move apps 2 "sd" storage as it might cuz slight speed issues since u r running android from d "same" mem card.

ZeroNEX said:
Aha, here we go somebody with the same problem
Yes it might be the kernal, the kernal in the phone shows these lines:
2.6.32.15.s8.0-gf06973d-dirty
[email protected]#10
Mon Dec 13 17:53:37 KART 2010
And I do remember that when I un-rar the ROM file, there was a kernal folder but I didn't use it because I don't know how!!!
Whould you please upload me the kernal you're using or give me the link you download it from??
Would some tell me how to install the new kernal ???
Regarding the Market issue, just don't worry about it " I was entering the wrong pass " Many thanks
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=787588
here it is. try the 8.6 (that's the one i'm using).
to install it on your phone:
unpack it
find the zImage file
copy it into android folder
find the root folder from the kernel zip
place the folder onto android
reboot
delete the root folder you pasted
(if i messed up something please, someone, correct me)

[Q] SO confused w/ ROMs/images/kernels/uggh. Need help w/ what to do :(

My head is aching with the sheer amount of information it is trying to process. I got a Nook Color about a month ago but have been putting off using it because I am still trying to figure out how to do what I want to do.
I've been going over the threads on the dev forum and after reading a lot of the threads, I still can't find exactly what I need (or maybe I've found it but I just haven't realized it yet).
My Nook Color is running latest official update from B&N (meaning 2.2 and B&N apps).
Anyway here's what I need:
1. I need to be able to dual boot into either HC or a rooted gingerbread-based version of android (is this the clockwork 7 thing?) solely from an SD card
2. Should not do anything to the Nooks internal memory (meaning: won't void warranty)
3. The dual boot manager, HC and and gingerbread-based version of android should all run on sd card. nothing will be placed/done on the nook (is this it? i'm so confused i'm not even sure anymore --- http://forum.xda-developers.com/showthread.php?t=1045018)
4. The dual boot manager will still have the ability to install other custom roms on to the sd card when i put the zip file of the image on to the sd card (something like this: http://forum.xda-developers.com/showthread.php?t=1000957)
5. Should have the overclock thingamajig
Anyway, are there any solutions to this? the "Dualboot Phiremod / Honeycomb Image for SDcard" seems the closest so far but I can't figure out if it installs a rom manager into the SD card with which I can install newer versions of the overclock kernel or newer versions of the custom ROMS based on HC preview or newer version of the CM7 nightly image. gaaaah.
Please help >_<. I promise I'm not stupid. This is just like information overload and I seriously am having a real headache (not just figuratively) right now.

Follow the thread below. From it, you can install plain CM7 (the best known gingerbread rom) strictly onto your SD card. If you have multiple cards, you can try out the different flavors of CM7:
CM7 Stable (latest is 7.0.3); OR
CM7 Nightly (latest is 76); OR
Beta CM7 .32 kernel, though this one is still has some bugs.
Phiremod is a themed CM7 which I haven't tried, while the above are more plain vanilla android. Also use a Sandisk card if you have one as they seem to have better overall speed regardless of Class, at least 2gb size or bigger.
http://forum.xda-developers.com/showthread.php?t=1000957

Hi LBN1, thanks for the quick reply.
Does this work process allow me to install HoneyComb as well as a separate boot option?

I just realized that I'm actually looking for an SD dual boot of HC and CM7 w/ OC. Does this exist? >.<

Oh, this process is not for a dual booting SD card. It allows a rom on a SD card, and then take out the SD card and you can boot to stock B&N software, so it is a quasi dual boot so to speak. There are some actual dual boot options out there but I don't have any experience with any of them...
Same thing with Honeycomb roms, never tried any of them since from what I read they are still in early, beta stages meaning they really don't work as well as CM7.

LBN1 said:
Oh, this process is not for a dual booting SD card. It allows a rom on a SD card, and then take out the SD card and you can boot to stock B&N software, so it is a quasi dual boot so to speak. There are some actual dual boot options out there but I don't have any experience with any of them...
Same thing with Honeycomb roms, never tried any of them since from what I read they are still in early, beta stages meaning they really don't work as well as CM7.
Click to expand...
Click to collapse
Hehe... yeah I kinda figured that out What I had in mind was something along the lines of dual booting HC/CM7 via SD card and removing the SD card if I wanted to boot to the stock 1.2 (so it's a quasi triple boot) >_<
But thanks for your help!

I think the easiest thing you can do right now is to try the Phiremod/Honeycomb Dual boot sd image which I see you already found out. It wont change or touch your internal system so you are safe. Also its already prepared for you so you just need to burn the img into the sd.
If inserted, the sd image will boot to either Phiremod (which is really a themed version of CM7 7.02 - with the update provided in the same thread or to Honeycomb). I use it and works quite well!!!! It is fast also (provided you use the recommended Sandisk class 4 sd card) as it is overclocked from the sd which you also want.
When I want to use stock BN I just boot without the sd and thats it! I also rooted the internal BN as well to add overclock to the stock BN 2.2 and it is quite snappy when OC to 1.1 mhz.

Hi Garoto! that's good to hear! can you point me to the thread for rooting the internal BN and adding overclock to the stock 2.2? i want to try that as well

pryonix said:
Hi Garoto! that's good to hear! can you point me to the thread for rooting the internal BN and adding overclock to the stock 2.2? i want to try that as well
Click to expand...
Click to collapse
Sure no problem:
1. To root the 1.2 version Nook just follow the steps in this thread, it is not as complicated as it sounds:
http://forum.xda-developers.com/showthread.php?t=1054027
2. To install the OC Kernel I used this thread. Pretty simple process. After you root , go to the market and install ROM manager, then do flash clockwork and then reboot to recovery, then do update from zip in sd card and flash the OC Kernel. I used the 1,1 mhz as it is stable and really speed things up:
http://forum.xda-developers.com/showthread.php?t=1064095

pryonix said:
Hi Garoto! that's good to hear! can you point me to the thread for rooting the internal BN and adding overclock to the stock 2.2? i want to try that as well
Click to expand...
Click to collapse
Keep in mind, overclocking definitely technically voids the warranty (as does rooting). Since you mentioned it. Just as bad as installing stuff on the internal EMMC.

greenmky said:
Keep in mind, overclocking definitely technically voids the warranty (as does rooting). Since you mentioned it. Just as bad as installing stuff on the internal EMMC.
Click to expand...
Click to collapse
Haha yup... just wanted to know as a "just in case I feel brave enough to void my warranty" haha!

[Q] Flash ROM On MicroSD Instead Of Internal Memory!

As The Title Suggests, Is There Any Way To Install A ROM Onto A 16GB MicrSDHC (class 10) Instead Of The Phones Internal Memory?
I 'Googled" It For Several Hours, Unfortunately Did Not Find An Answer.
Let Me Explain Further As To What I'm Really Trying To Accomplish. I Want To Flash A(ny) ROM Onto The MicroSD Card So I Will Have The Entire Internal Memory Free On My G1. And Then (if at all possible) Somehow Use The Internal Storage As Extended RAM.
Even If This Seems "Close To Impossible", Could Someone With Enough Knowledge (a dev?) Explain How Something Like This "Could" Be Accomplished??
Thanks For Your Time! Can't Wait To Read What People Have To Say About This..
Ideas & Possible Solutions Are Better Than Just Saying 'It Can't Be Done..etc'

As for installing a rom onto sdcard (even on ext2 partition as it is being done on the HTC Fuze/Diamond/Topaz/etc windows series phones), it is completely possible, but it is very slow.. i don't see why you would want to do that even compared to NAND install if you have lots of ram
I used to be a developer for the HTC Fuze (Touch Pro) and made a 2.2 aosp SD-ext rom, it still isn't as fast as the G1 even though it has slightly higher specs: 288 ram, msm7201a (same cpu as htc dream)..
You can't extend the RAM, but you can make it swapspace. It would kill the internal memory very quickly because it is only yaffs and has a limited number of read and writes...

SH31KH said:
As The Title Suggests, Is There Any Way To Install A ROM Onto A 16GB MicrSDHC (class 10) Instead Of The Phones Internal Memory?
I 'Googled" It For Several Hours, Unfortunately Did Not Find An Answer.
Let Me Explain Further As To What I'm Really Trying To Accomplish. I Want To Flash A(ny) ROM Onto The MicroSD Card So I Will Have The Entire Internal Memory Free On My G1. And Then (if at all possible) Somehow Use The Internal Storage As Extended RAM.
Even If This Seems "Close To Impossible", Could Someone With Enough Knowledge (a dev?) Explain How Something Like This "Could" Be Accomplished??
Thanks For Your Time! Can't Wait To Read What People Have To Say About This..
Ideas & Possible Solutions Are Better Than Just Saying 'It Can't Be Done..etc'
Click to expand...
Click to collapse
Google Android rom's or Operating systems have rules and limits, I do know androids 2.2 did not allow system files to run outside /system folder, now it's allowing more as you see lot's of rom's using /ext (linux partitions) I do not know all the limits, but do believe there has to be a part of the rom in internel memory to be able to boot sd-card

Hardware compatibility between Android and Windows yoga 2 tablets

From what I can tell, the hardware looks almost identical between the tablet versions.
Would that mean, it might be possible to flash android onto the windows version, and vice versa? I would only see a problem going from android -> windows as the internal storage is not 32gb, it is 16gb. Or possibily dual booting both using the sd card for one?
Speculating further, I wonder if multirom would be able to boot windows after some type of modifications? Or would a custom bootloader need to be written? or could the windows bootloader work somehow?
Also, we really need our own forum for the yoga 2 tablet.