Thread: running OS off mmc card - why ext2 filing system?
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GeneralAntilles is offline GeneralAntilles
2008-07-07 , 17:49
Posts: 5,478 | Thanked: 5,222 times | Joined on Jan 2006 @ St. Petersburg, FL
#4
Originally Posted by ace View Post
SD/MMC cards are not accessed as a raw flash device. There may still be advantages to JFFS2, but it isn't truly needed the way it is on a raw flash device.
No, there's no advantage to jffs2 for non-raw flash devices. Actually, there's the potential to do damage to the card as the jffs2 wear-level algorithm and the card's internal wear-leveling have the potential to cancel each other out.

Besides, have you guys investigated how jffs2 works? The wikipedia article provides a bit of information but, suffice to say, scanning a 1GB (let alone an 8GB) jffs2 filesystem into memory will take a very long time.