Questions
Questions
Questions
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Partition Type/Index Name Start Offset Size File System Content<br />
N/A BOOT Loader 0 1 MB N/A Bootloader<br />
Primary 1 Boot 8 MB 8 MB<br />
Primary 2 Recovery After end of Boot 8MB<br />
Logic 5<br />
(Extended 3)<br />
Logic 6<br />
(Extended 3)<br />
Logic 7<br />
(Extended 3)<br />
Logic 8<br />
(Extended 3)<br />
Logic 9<br />
(Extended 3)<br />
Why does Android use the partitioning scheme it does?<br />
• Android 4.0 CDD only states the following:<br />
• At least 350MB of non-volatile storage for private application data - /data<br />
• Download Manager must be able to download at least 100MB file size to default “cache” location<br />
• At least 1GB of non-volatile shared storage for applications - /sdcard<br />
Why did the partitioning scheme change in R13.2 ICS?<br />
• This scheme is commonly adopted by in other Android products. It added a vendor and boot partition to support<br />
vendor specific information and support recovery OTA<br />
TM<br />
SYSTEM<br />
CACHE<br />
DATA<br />
After end of<br />
Recovery<br />
After end of<br />
SYSTEM<br />
After end of<br />
CACHE<br />
512 MB<br />
256 MB<br />
><br />
1024 MB<br />
Vendor After end of DATA 8 MB<br />
Misc<br />
After end of<br />
Vendor<br />
Primary 4 MEDIA After end of Misc<br />
4 MB<br />
Up to remaining<br />
sectors<br />
25<br />
boot.img format – kernel +<br />
ramdisk<br />
boot.img format – kernel +<br />
ramdisk<br />
boot.img<br />
recovery.img<br />
EXT4 – mount as /system Android system files<br />
under /system<br />
EXT4 – mount as /cache Android cache for OTA<br />
image store<br />
EXT4 – mount as /data Data storage for<br />
system applications<br />
EXT4 – mount as /vendor Vendor specific<br />
information<br />
N/A Recovery store,<br />
bootloader message<br />
VFAT Internal media files<br />
under /mnt/sdcard<br />
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