Solving Data Loss in Massive Storage Systems | SNIA

Abstract

The problem of data loss becomes harder as storage systems scale and technology advances. Disks become larger and take longer to rebuild; increasing the probability of LSEs and secondary failures. As systems grow to Petabytes, hundreds of individual parity groups exist, each having its own chance to fail. New technologies, beyond RAID 6, are required to address such issues as correlated disk failures, latent sector errors, and silent data corruption, in these massive storage systems.

Learning Objectives

The difference between Latent Sector Errors, Silent Errors, Correlated Failures, and Operational Failures
Events which lead to data loss in today's systems
Why the problem of data loss is becoming more difficult to deal with over time
RAID 5 is dead and why RAID 6 won't last for long
What technologies can be applied to address this problem