Scale Computing HC3 only serves block devices to the supported OS guest platforms. VMs running on HC3 have direct, block-level access to virtual SCRIBE devices (VSDs, aka virtual disks) in the clustered storage pool without the complexity or performance overhead introduced by using remote storage protocols.

A critical software component of HyperCore is the Scale Computing Reliable Independent Block Engine, known as
SCRIBE. SCRIBE is an enterprise class, clustered block storage layer, purpose built to be consumed by the HC3 embedded KVM based hypervisor directly.

SCRIBE discovers and aggregates all block storage devices across all nodes of the system into a single managed pool of storage. All data written to this pool is immediately available for read and write by any and every node in the storage system, allowing for sophisticated data redundancy, data deduplication, and load balancing schemes to be used by higher layers of the stack—such as the HyperCore
compute layer.

SCRIBE is a wide-striped storage architecture that combines all disks in the cluster into a single storage pool that is tiered between flash SSD and spinning HDD storage.