A New Problem: Misdirected Writes
In this lesson, we look at the problem of misdirected writes and discuss a solution for it.
We'll cover the following...
We'll cover the following...
The basic scheme described in the previous lesson works well in the general case of corrupted blocks. However, modern disks have a couple of unusual failure modes that require different solutions.
The first failure mode of interest is called a misdirected write. This arises in disk and RAID controllers which write the data to disk correctly, except in the wrong location. In a single-disk system, this means that the disk wrote block not to address (as desired) but ...