A VERY strange idea...

[Guest Rajit]

I know this might sound silly and would probably be too slow even if implented (if it's even possible), or it just might impractical, but i just had this strange idea...

What if we could create a dual (or even triple) booting system by utilising nandroid backups??

Firstly a nandroid backup of all the roms is put on the sd car. You basically just restore the nandroid (rom) that you want to boot into.

Then in quick boot, an option like 'change rom' could be present, which would update the nandroid backup (or just create a new backup replacing the old one if updating is not possible) of the currently booted rom, and at the next startup could provide an option to boot into any one of the present roms (by restoring one of the present nandroid backups).

And since the nandroid was updated, all the changes you made would still be there.

This way, we could use a rom like xian on our usual work days and when on an outing, we could boot into lcr and enjoy the dolby goodness and the divx support...

Don't rant me... just had this wild thought and had to share it with you all...

Edited July 19, 2010 by Rajit

[Guest BigBearMDC]

I know this might sound silly and would probably be too slow even if implented (if it's even possible), or it just might impractical, but i just had this strange idea...

What if we could create a dual (or even triple) booting system by utilising nandroid backups??

Firstly a nandroid backup of all the roms is put on the sd car. You basically just restore the nandroid (rom) that you want to boot into.

Then in quick boot, an option like 'change rom' could be present, which would update the nandroid backup (or just create a new backup replacing the old one if updating is not possible) of the currently booted rom, and at the next startup could provide an option to boot into any one of the present roms (by restoring one of the present nandroid backups).

And since the nandroid was updated, all the changes you made would still be there.

This way, we could use a rom like xian on our usual work days and when on an outing, we could boot into lcr and enjoy the dolby goodness and the divx support...

Don't rant me... just had this wild thought and had to share it with you all...

There would be a far easier way:

Install different Android versions on the SD Card, and make a small menu that lets you choose which one you want to boot.

Actually that should be pretty easy too (in principle).

Best regards,

BigBear

[Guest uapo7]

Old idea. :angry: I have backupped my android 2.1+ lcr and android 2.2 with nandroid. So i have "dualboot". I just go to recovery and restore 2.1 or 2.2. And i have used this "dualboot" system many weeks. :D

[Guest phhusson]

I know this might sound silly and would probably be too slow even if implented (if it's even possible), but i just had this strange idea...

What if we could create a dual (or even triple) booting system by utilising nandroid backups??

Firstly a nandroid backup of all the roms is put on the sd car. You basically just restore the nandroid (rom) that you want to boot into.

Then in quick boot, an option like 'change rom' could be present, which would update the nandroid backup (or just create a new backup replacing the old one if updating is not possible) of the currently booted rom, and at the next startup could provide an option to boot into any one of the present roms (by restoring one of the present nandroid backups).

And since the nandroid was updated, all the changes you made would still be there.

This way, we could use a rom like xian on our usual work days and when on an outing, we could boot into lcr and enjoy the dolby goodness and the divx support...

Don't rant me... just had this wild thought and had to share it with you all...

Booting into recovery when switching is that hard ? It wouldn't change much on the time needed.

Anyway, for systems using the same kernel, it should be doable to put one ROM on sdcard with a boot choser in boot.img.

If there is some specific requests for that, I might try it. (Just give me specific ROMs to work on)

[Guest BigBearMDC]

Booting into recovery when switching is that hard ? It wouldn't change much on the time needed.

Anyway, for systems using the same kernel, it should be doable to put one ROM on sdcard with a boot choser in boot.img.

If there is some specific requests for that, I might try it. (Just give me specific ROMs to work on)

This should work with different kernels also. You might reflash them :angry:

Best regards,

BigBear

[Guest Rajit]

Old idea. :angry: I have backupped my android 2.1+ lcr and android 2.2 with nandroid. So i have "dualboot". I just go to recovery and restore 2.1 or 2.2. And i have used this "dualboot" system many weeks. :D

Well that confirms that its atleast a sane idea xD.. im just wondering that if some tools could be provided to make the transition more seamless

[Guest Rajit]

@phh and bigbear

Exactly, that is the main benefit of using nandroids.. we could boot roms with radically different settings (kernels, frameworks etc. by just restoring them...

[Guest BigBearMDC]

@phh and bigbear

Exactly, that is the main benefit of using nandroids.. we could boot roms with radically different settings (kernels, frameworks etc. by just restoring them...

I already thought of inventing a dualboot system for the T-Mobile Pulse.

The difference is that you wouldn't have to change anything with a dualboot kernel - just switch on the phone and decide which ROM you want to use.

You'd only have to partition your SD Card and copy the files to it.

Best regards,

BigBear

[Guest phhusson]

This should work with different kernels also. You might reflash them :angry:

Best regards,

BigBear

If it's in sdcard, it's to prevent from flashing...

Would be possible with flashing but annoying and not really useful.

@phh and bigbear

Exactly, that is the main benefit of using nandroids.. we could boot roms with radically different settings (kernels, frameworks etc. by just restoring them...

Most ROMs can have the same kernel, and that's all that has to be shared, frameworks would be on different systems.

[Guest Rajit]

Most ROMs can have the same kernel, and that's all that has to be shared, frameworks would be on different systems.

Sounds right, but what if they're using custom kernels on the different roms like ure 920 Mhz (with svs+tsfix, etc) kernel on lcr and 998 Mhz (at 1.3V) on xian??

[Guest xian1243]

I clearly stated in my v0.9 changelog that I used phh's kernel source (which includes the touchscreen fix (hack :angry:) and static voltage scaling). So if we had Xian on the NAND with the boot.img, booting LCR on the SD card would be feasible.

[Guest Rajit]

i was just considering possible scenarios regarding the kernels.. hehe

Edited July 19, 2010 by Rajit

[Guest xdxdxdxdxdx]

I know this might sound silly and would probably be too slow even if implented (if it's even possible), or it just might impractical, but i just had this strange idea...

What if we could create a dual (or even triple) booting system by utilising nandroid backups??

Firstly a nandroid backup of all the roms is put on the sd car. You basically just restore the nandroid (rom) that you want to boot into.

Then in quick boot, an option like 'change rom' could be present, which would update the nandroid backup (or just create a new backup replacing the old one if updating is not possible) of the currently booted rom, and at the next startup could provide an option to boot into any one of the present roms (by restoring one of the present nandroid backups).

And since the nandroid was updated, all the changes you made would still be there.

This way, we could use a rom like xian on our usual work days and when on an outing, we could boot into lcr and enjoy the dolby goodness and the divx support...

Don't rant me... just had this wild thought and had to share it with you all...

the data would not be store