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Root [HOW-TO] Download and Install CM7 to Run Off SD Card

Discussion in 'Android Devices' started by koopakid08, Jul 1, 2011.

  1. koopakid08

    koopakid08 Android Expert
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    Behind you
    Make the 4th partition take up all the unused space.
     

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  2. koopakid08

    koopakid08 Android Expert
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    You edited it just as I posted that. The reason that it doesn't show very much space when you put it in the computer directly is that windows will only see one partition witch is usually the boot partition.
     
  3. ramirogz

    ramirogz Newbie
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    I installed the image with Winimage using the restore option. Then I copy the CM7 zip using the windows file explorer. When I insert it into the nook the text with the penguin appears and some lines contain errors (not enough space, etc.). After it powers off I turn it on an the stock OS appears.

    Also I notice that the partition winimage creates is 130MB aprox.

    What am I doing wrong? should I use create virtual disk instead of restore? which options should I choose afterwards?

    Thanks
     
  4. colchiro

    colchiro Android Expert
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    What size sdcard are you using? Was it used for something before (so might already be partitioned)?
     
  5. Modman

    Modman Android Enthusiast
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    Successfully installed with a 32 gig card. I have the nook with the blue dot. Seems like cm7 partitioned the rest of the space and made it usable. Is there any advantage to installing to the device itself? If not might just leave it like it is. If i would have realized I needed a bootable working system just to format the nook probably wouldn't have rooted at all. But I did successfully root becauase I was unaware of the problems with the blue dot nook. can't get into cwm with the bootable cm7. but copy the gapps to the boot folder installed market and gapps. might just use tb to back up my apps to other sd partition. If it crashed would probably have to recreate bootable cm7 and restore apps and data from tb. could see that not able to take an image backup might be one disadvantage.
     
  6. welbinator

    welbinator Android Enthusiast
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    when you say "it went into recovery and nothing happened" I assume you meant "it went into recovery, I selected 'install zip from sdcard' then selected 'choose zip from sdcard' then selected the the zip file, then selected 'yes install' and THEN nothing happened" correct?
     
  7. colchiro

    colchiro Android Expert
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    Yes, there is. Ever hear of a sdcard failing? It's very rare for the internal ram (EMMC) to fail tho. Sdcards are slower, subject to failure, they're harder to update, easier to screw up (since most guides and apps expect the rom is installed on the NC).
     
  8. Modman

    Modman Android Enthusiast
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    I ask this because you say that they are subject to failure.

    I have one 32 gig SD card in each of my three android devices.

    One was reformatted and moved from a blackberry. I have also had 2 gig SD cards in voice cell phones. So far zero percent have failed. If I had to reinstall this device because the device failed I would have to reformat another SD with cm7. Then I might consider the complicated repartitioning of my blue dot nook. Or if it doesnt crash might not consider it again till cm9 if nook color ever gets it.Updating to every nightly does not interest me. I only need to upgrade if I'm having issues. If I backed up my data once a week with TB could just recover it after reinstalling. Also some people keep saying sdcards are so much slower. To be honest I have a 32 gig sandisk SD card on all my devices I run apps from the card. Maybe a little slower but no major issues.
     
  9. colchiro

    colchiro Android Expert
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    You WANT slower cards for android. :D

    Of all the cards tested (and there were a lot), the Sandisk class 4 card was the fastest for reading small randomly placed files, like you'd find when running from a sdcard. Sandisk also one of the more reliable brands. The 16 gb Sandisk card that came with my DroidX is still working after 15 months.

    Faster cards, like class 10, are optimized for writing large files sequentially, like camera or video use... big difference. I purchased a 16 gb class 10 for use on my NC and it died after 5 weeks. It wasn't even used as a bootable card (which I have no use for). Browse the busier forums (like the DroidX) and you'll see 3 or 4 users a month with failed scards.

    Bear in mind that the sdcard in your phone isn't used much, where a rom booted off the sdcard is used the entire time.... big difference.
     
  10. Modman

    Modman Android Enthusiast
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    However it was kinda used a lot cause I ran multiple programs off the as card.if I had it break might be a first. If it ever does. I assume I can hold in power off nook. Then use my rooted stock till I get another one. Might have to thoroughly research formatting till I'm comfortable then do it. Darn blue dot. Need a working bootable is just to do it. Cwm woulda worked on original.
     
  11. colchiro

    colchiro Android Expert
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    The only problem with your sdcard dying is it contains all your backups (recovery and apps). Yes, holding down the power button does work with the NC.
     
  12. xeno2011

    xeno2011 Well-Known Member
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    Quick question: I initially tried to install CM7 on my Nook color using the SD card boot (have a Sandisk Class 4), using the most recent stable build and then installing gapps. No matter what, the Nook would always reboot itself at some point while I was using CM7 and the ROM would be corrupted (Nook would reboot back to stock ROM). I could always install the ROM just fine, but it would either reboot before installing gapps or shortly thereafter. Any tips on why this might be happening with the recommended Sandisk SD Card (8GB). Thanks.
     
  13. jonnybabytx

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    I can't even seem to write the image onto my SD card I'm using a Lexor 16gb class 4 card. I know this isn't the recommended SanDisk, but the problems people seem to be having with microSD cards seem to be speed, not writing.

    I am using WinImage and a specified card reader through a USB 2.0 cord. Is there a better place to download the image file from?

    In WinImage I go to the [Disk] menu and use the option [Restore Virtual Hard Disk Image on physical drive...]. From the window I select my disk which is a 15 mil KB drive. When prompted to select the image file I change the settings to see [All Files] so that it finds the file [generic-sdcard-v1.3.img]. When I do this it gives me a warning that it will erase the disk, and I click [OK]. The file seems to be working, but it always stops a 99% and gives me an error message that it does read the file [generic-sdcard-v1.3.img].

    Help me, I'm stuck at square one!
     
  14. chocophile

    chocophile Well-Known Member
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    If WinImage doesn't work, give Win32DiskImager a try.
     
  15. jonnybabytx

    jonnybabytx Lurker
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    Win32DiskImager does not seem to work for me either. I does not find any files with the .img ending. I am a total noob at any of this. WinImage is the only imager that's seemed to work for me.

    I also used a Panasonic SD disk formatter v2.0 as recommended by crash tech dummies from their youtube video. But, that has not seemed to make any of this work either.

    Any other advice?
     
  16. chocophile

    chocophile Well-Known Member
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    Maybe it's not the image program. How are you connecting your microSD card to the computer? USB to MicroSD adapter in a USB port? MicroSD to SD adapter in an SD slot?

    If you're using a USB port, try another USB port. Don't use a USB hub if you don't have to. In my case, I couldn't use the USB or SD ports on my monitor, but I can use those in the computer itself.
     
  17. colchiro

    colchiro Android Expert
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    If neither Winimage OR W32 work, then:


    • you have a bad adapter or usb port,
    • you aren't unzipping the image file,
    • the img file is corrupt
    • the img file isn't the correct one for the sdcard (size).
     
  18. tuhraycee

    tuhraycee Newbie
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    I can't find a good link/download to samuelhalff's Nook Color UMS. The link above and the barcode scan link aren't working. Can anyone help?
     
  19. colchiro

    colchiro Android Expert
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  20. tuhraycee

    tuhraycee Newbie
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    Thanks, I think that worked.

    Now I have a very basic hang-up. I've never used WinImage before (heck, it took me hours to figure out what to open the .gz file with...) and here I am with the unzipped .gz file generic-sdcard.img and I don't know what I'm doing next. I started to Create Virtual Hard Disk Image from Physical Drive and canceled it. Was that the right next step?

    TIA! I'm really hoping to avoid buying a pre-loaded root card and get this done by Christmas!
     
  21. chocophile

    chocophile Well-Known Member
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    Forget about winimage. Download Win32DiskImager. For me, at least, Win32DiskImager works better. Fire it up (it requires admin rights), open the .img file, make sure that the device points to your MicroSD card, then click write. This will write the generic sdcard image to the SD card, making it bootable.

    From there, put the CM7 zip file of your choice on the card (leave it zipped). Put the card in your NC, turn on the NC, and it will install CM7 on the SD card.
     
  22. colchiro

    colchiro Android Expert
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    Isn't that supposed to be RESTORE virtual hard disk image? :D

    Whichever app works. I wish w23diskimager had an installer. Not everybody knows how to extract to a folder and create a shortcut in their start menu.
     
  23. tuhraycee

    tuhraycee Newbie
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    Well, I have CM7 on there and gapps (at least I think - it prompted me to add my my google accounts) but it won't let me install the apps I want from the market. With Facebook or Firefox apps it tells me my device is not compatible with those items. ????
     
  24. bobstro

    bobstro Well-Known Member
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    Did you try clearing the Market app data?
     
  25. tuhraycee

    tuhraycee Newbie
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    I'll try that tomorrow morning, thanks! It's wrapped up and under the tree right now. :p
     

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