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How Disk Aggregation improves NVMe performance

Storage aggregation, aka disk aggregation, is a method of combining multiple independent disks (physical SSDs or hard drives, or partitions thereof), into a single logical disk, either via a hardware device, such as a RAID controller, or software driver or application, such Software Defined Storage suite (VMware vSAN, Linux CEPH), with the goal of maximizing transfer performance and/or storage capacity, and data reliability (redundancy).

Storage aggregation solutions may incorporate one or more storage/connectivity devices, such as a PCIe HBA (host bus adapter) or AIC (add in card). Such devices can be used in conjunction with or the host platforms built-in storage interfaces, or configured to support an independent storage pool.