On 5 Sep 2006, Paul Waldo uttered the following: > What about bitmaps? Nobody has mentioned them. It is my > understanding that you just turn them on with "mdadm /dev/mdX -b > internal". Any caveats for this?
Notably, how many additional writes does it incur? I have some RAID arrays using drives which are quiet *until* you access them, and which then make a bloody racket. The superblock updates are bad enough, but bitmap updates, well, I don't really like seeing one write turned into twelve-odd disk hits that much (just a back-of-the-envelope guess for a three-disk RAID-5 array). -- `In typical emacs fashion, it is both absurdly ornate and still not really what one wanted.' --- jdev - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
