hi, I have a silly question. Why md request buffers will not across devices? That means Why a bh will only locate in a single storage device? I guess maybe file system has aligned the bh? Who can tell me the exact reasons? Thanks a lot! zkwang - 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