Originally Posted by Imbroglio
I have spent the last week reading and searching the forums in an attempt to find out how to be able to access and use the empty space left on a CM7 boot sd. Some of the posts were confusing and others seemed to be targeted to those who are already very familiar with the file structures of these systems. The only paritioning experience I have is dividing a boot drive before putting on XP. I am using a Sandisk 8gb and it looks like there is about 5 gig free. Win XP is the os I am running.
5G sounds about right for the /sdcard partition. The rest of the partitions on an 8G card are /boot, /system, and /data. Use Root Explorer to poke around; you can tell when you jump partitions because the used/free numbers at the top will change.
/boot is not normally mounted.
The root filesystem is in-memory and is initialized from /boot/uRamdisk by default.
So the questions I have are:
1) In simple terms, exactly what has to be done to a boot CM7 SD card to be able to use the empty space for books, mp3, etc? On the recommendations I read in different threads, I downloaded easus partition master, gnome partition editor, and minitool partition wizard. They all pretty much do the same of being able to display the 4 partitions, but what do with the programs then?
In the near future I would like to get a 16g or 32g and wouldn't want all of that space going to waste.
The original instructions in the size-agnostic install thread
detail what happens to various sizes of card; for anything above 2G /sdcard gets all the extra.
Any apps that use /sdcard for storage will use this space. App-specific config data and small databases are generally in /data unless instructed otherwise (I'm using less than 300M of my /data partition as yet). The app info or permissions will often give clues; if the permission for "read and write SD card" is requested or required, the app can or must use this space. Some apps (like BeyondPod) will always use /sdcard.
So, your space isn't wasted, it's just unused until you fill it.
2) Is it possible to have it so that the NC stock boot can read the books downloaded in CM7? I have not been able to find where CM7 stores books.
The CM7 SD boot cleverly uses the built-in memory for both /cache and (at least some) media storage; the "media" stock partition pre-1.2 is mounted as /emmc; I don't know how the SD boot uses the newer partitions. The NC app stores books in "/emmc/B&N Downloads/Books" and magazines in ".../Magazines". You can move your music files to "/emmc/My Files/Music" and the stock music player will automagically find them there, freeing up even more space in your SD. This partition is mounted the same for emmc-booted NCs, making an easier transition if you get to that point (it took me months to decide to go ahead and do it, and I'm happy with the choice). Other apps may look there, or can be told to look there, but since it's a new-ish Android "feature" (convention, really), it's not universal.
When you use USB mounting by plugging your charger cable into your PC's USB socket, by default the two "drives" mounted are /sdcard (named "CM7 SDCARD") and /emmc ("MyNookColor"), so you can use your PC to explore, backup, and move files back & forth to experiment. Both partitions are FAT32, so all PCs should be able to handle them. Remember to tell the PC to unmount them in software before unplugging the cable, like any thumb drive.
Thanks to all whose work helped me get to this point. The NC is a fascinating piece of hardware.
It is, isn't it? I haven't regretted buying one for a minute.