To spare you the mabo jambo, I will present you the short version. If you align you sdcard partition you speed up access time, write speed and read speed, so every operation including a sdcard read or write should be improved.
For EXT
Here is pretty easy. You download a zip and flash it from recovery.
EXT4 Align Flashable zip
or
This an aligned EXT4 with journaling disabled aka faster
It will erase all data from ext partition so make a backup (not nandroid backup). Doesn't matter what ext type you have, it will be ext4 after you run the zip. Flash the zip, reboot recovery then flash the rom
For FAT32 well this is a little more tricky, but don't worry if you understand English at a medium level and you have 15 minutes to read the thread is pretty easy. Here is the link: http://www.patriotmemory.com/forums/showthread.php?t=3696 , I take no credit for the good in there, I only share it with you.
You say make a backup but not a nandroid, so in other words a Titanium Backup right? well what about a Nandroid 'Advanced Restore' where you can choose to 'Restore data' only?
VastaaPoistaThx!
Matt.
is possible apply EXT4 Align Flashable zip after rom flashing?
VastaaPoistaI already flashed the rom; I would backup ext data, flash EXT4 Align Flashable zip, restore data on ext and reboot the system.
Is it correct ?