Windows Azure Storage (WAS) is a cloud storage system that provides customers the ability
to store seemingly limitless amounts of data for any duration of time. WAS customers have …

Maximum distance separable (MDS) array codes are widely used in storage systems to
protect data against erasures. We address the rebuilding ratio problem, namely, in the case …

We design flexible schemes to explore the tradeoffs between storage space and access
efficiency in reliable data storage systems. Aiming at this goal, two new classes of erasure …

Theoretical and practical tools to master matrix code design strategy and technique Error
correcting and detecting codes are essential to improving system reliability and have …

Proper data placement schemes based on erasure correcting codes are one of the most
important components for a highly available data storage system. For such schemes, low …

In the past few years, all manner of storage applications, ranging from disk array systems to
distributed and wide-area systems, have started to grapple with the reality of tolerating …

Large centralized and networked storage systems have grown to the point where the single
fault tolerance provided by RAID-5 is no longer enough. RAID-6 storage systems protect k …

A family of codes with a natural 2-D structure is presented, inspired by an application of
redundant arrays of independent disks (RAID) type of architectures whose units are solid …

We present a new family of XOR-based erasure codes primarily targeted for use in disk
arrays. These codes have a unique data/parity layout, with both horizontal and vertical parity …

RAID-6 significantly outperforms the other RAID levels in disk-failure tolerance due to its
ability to tolerate arbitrary two concurrent disk failures in a disk array. The underlying parity …