On 2013-04-15, Oliver Schinagl <oliver+list@xxxxxxxxxxx> wrote: > I highly doubt it, since, as said above, the md layer could not ever > possibly know what data is on the disk. In theory it could, if it recorded metadata about what it's written over the array's lifetime. Some newer 3ware controllers claim to support this feature (it's called something like "rapid RAID recovery"). Their docs don't describe how or where this information is stored. But AFAICT md doesn't support this feature. --keith -- kkeller@xxxxxxxxxxxxxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html