Handling Latent Sector Errors
Understand how latent sector errors in storage devices are detected and managed using redundancy mechanisms such as mirrored RAID and parity-based reconstruction. Explore challenges during disk reconstruction and solutions like extra parity blocks that improve fault tolerance in storage systems.
We'll cover the following...
Given the two new modes of partial disk failure we discussed in the last lesson, we should now try to see what we can do about them. Let’s first tackle the easier of the two, namely latent sector errors.
CRUX: HOW TO HANDLE LATENT SECTOR ERRORS
How should a storage system handle latent sector errors? How much extra machinery is needed to handle this form of partial failure?
As it turns out, latent sector errors are rather straightforward to handle, as they are (by definition) easily detected. When a storage system tries to access a block, and the disk returns an ...