Originally Posted by drawde40599
Manual format system wipe gets something factory reset don't ( I can't prove this but from experience ive had issues that were only fixed after format system ) on my galaxy s its almost mandatory . With new 4.0
/system isn't formatted during factory reset, only /data and /cache. /system is formatted during ROM flashing with this line in updater-script:
format("ext4", "EMMC", "/dev/block/platform/omap/omap_hsmmc.0/by-name/system", "0");
A ROM from an experienced dev that is intended to be clean-installed will always have this line.
Formatting /system in CWM does the same thing.
I've never had a Galaxy S so I can't speak for that device.