On Tue, 5 Sep 2006, Paul Waldo wrote: > 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?
bitmaps have been working great for me on a raid5 and raid1. it makes it that much more tolerable when i accidentally crash the box and don't have to wait forever for a resync. i don't notice the extra write traffic all that much... under heavy traffic i see about 3 writes/s to the spare disk in the raid5 -- i assume those are all due to the bitmap in the superblock on the spare. i've considered using an external bitmap, i forget why i didn't do that initially. the filesystem on the raid5 already has an external journal on raid1. -dean - 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
