On Sun, Dec 11, 2005 at 11:29:23PM +0900, Yanggun wrote: > I did not find involved part with this in the document. > > I am sorry, inform it is what section. Basically, the md driver acts like another hard disk. So a regular setup looks like this: --------------------------------- | | | Applications (ls, cat) | | | --------------------------------- | v --------------------------------- | | | Filesystem (ext3) | | | --------------------------------- | v --------------------------------- | | | Block layer (sda1/sdb1) | | | --------------------------------- and a software RAID setup looks like this: --------------------------------- | | | Applications (ls, cat) | | | --------------------------------- | v --------------------------------- | | | Filesystem (ext3) | | | --------------------------------- | v --------------------------------- | | | Block layer (md0) | | | --------------------------------- | v --------------------------------- | | | Block Layer (sda1/sdb1) | | | --------------------------------- The format of sda1/sdb1 is the RAID data that the md driver writes to them. It form a complete layer of abstraction between your applications and the actual devices you are storing data on. -- Ross Vandegrift ross@xxxxxxxxxxxx "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of Hell." --St. Augustine, De Genesi ad Litteram, Book II, xviii, 37 - 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