What is a Block Server? 

Block storage is a storage architecture that divides data into fixed-size units called blocks, with each block identified only by an address rather than any descriptive file metadata. A software layer, independent of the underlying physical storage media, manages where each block is stored and how blocks are retrieved and reassembled into complete files or data structures when an application needs them. Block storage is typically accessed over protocols like Internet Small Computer Systems Interface (iSCSI), Fibre Channel (FC), or Fibre Channel over Ethernet (FCoE), most often within a storage area network (SAN) that presents storage to servers as if it were a locally attached drive. This architecture allows an application to modify a small piece of data, such as updating a single record in a database, by rewriting only the specific blocks involved, rather than rewriting an entire file or object, which makes block storage particularly well suited to transactional and latency-sensitive workloads.

Why do you need to know it? 

Many of the most critical enterprise workloads, including databases, email systems, and virtual machine disk images, need to make frequent, small changes to data with minimal delay, and the storage architecture underneath directly determines whether that's possible efficiently. Choosing a storage type that doesn't support fine-grained, in-place edits can force applications to rewrite far more data than necessary for even minor changes, degrading performance and increasing wear on storage media. Understanding block storage, and specifically when it's the right choice versus file or object storage, helps IT teams match their storage architecture to workload requirements, particularly for transactional systems where latency and consistency directly affect business operations. This matters most for virtualization environments and databases, where block storage's low-latency characteristics are frequently a requirement rather than simply a preference.

Benefits of Block Servers

Block storage's ability to edit data in place, rather than rewriting entire files or objects, delivers strong performance for I/O-intensive, latency-sensitive applications like databases and transactional systems, where even small delays can affect user experience or business operations. This granularity also reduces unnecessary data movement, since only the specific blocks that change need to be rewritten, which helps both performance and the wear characteristics of the underlying storage media. Block storage architectures have decades of maturity behind them, including well-established RAID-based data protection schemes that provide reliable redundancy against drive failure. Virtualization environments in particular benefit from block storage's performance characteristics, since virtual machine disk images require the same kind of frequent, small, low-latency writes that block storage is designed to handle efficiently, making it a natural fit for VM migration and dynamic resource allocation across a virtualized environment.

How does ASUS help? 

ASUS addresses block storage needs through its VS320D series of hybrid flash storage systems. The VS320D-RS26, a 2U system with 26 2.5-inch drive bays, is built as a high-density hybrid flash platform that ASUS positions as delivering roughly 8% more capacity than typical 2U/24-bay competing systems, directly lowering both cost-per-terabyte and the rack space needed to reach a given capacity target. It's aimed at virtualization, database, mail server, and VDI environments where block storage's low-latency characteristics matter most. For organizations with different capacity and density needs, the VS320D-RS12, a 2U system with 12 3.5-inch bays, offers a compact hybrid flash configuration with a lower acquisition cost, targeted at use cases like large-scale surveillance and backup, particularly for small and medium-sized businesses facing unpredictable growth. Both systems combine flash performance with the capacity efficiency organizations need to run demanding block-storage workloads without overspending on infrastructure.