Enterprise Storage: NAS, SAN, DAS and Object, Matched to the Workload
Enterprise storage is the systems that store, protect and serve an organisation's data: block storage (SAN) for databases and virtual machines, file storage (NAS) for shared and unstructured data, direct-attached storage (DAS) for single servers, and object storage for backups, archives and cloud-native applications at massive scale. It runs on all-flash or hybrid media, with the data services, snapshots, replication, deduplication and tiering, that keep data fast, safe and affordable.
Enterprise data is growing faster than most storage budgets, and AI has added a new tier of demand: petabytes that must be read at high throughput to keep GPUs busy. Storage is the layer where the wrong decision is quietly expensive, either over-provisioned capacity nobody uses, or arrays so slow they throttle the very databases and AI jobs they were bought to serve.
The Four Types of Enterprise Storage
Most enterprises run more than one type, chosen by how the application reads and writes. The table below sets out where each fits.
| Type | How it is accessed | Best for | Protocols |
|---|---|---|---|
| SAN (block) | Block-level over a dedicated storage network | Databases, virtualisation, latency-sensitive apps | Fibre Channel, iSCSI, NVMe-oF |
| NAS (file) | File-level over the network | Shared files, home directories, unstructured data | NFS, SMB |
| DAS (direct) | Block, attached directly to one server | Single-server, high-speed local workloads | SAS, NVMe |
| Object | HTTP API over a flat namespace | Backups, archives, cloud-native apps, massive scale | S3 |
The media matters as much as the type. All-flash NVMe arrays such as NetApp AFF, Dell PowerStore and PowerMax, HPE Alletra and Hitachi VSP serve latency-sensitive workloads; hybrid arrays mix flash and disk where capacity costs more than milliseconds; and scale-out platforms such as NetApp ONTAP and Dell PowerScale grow to petabytes for unstructured data and AI. Object platforms such as NetApp StorageGRID, Dell ECS and Hitachi HCP handle archives and cloud-native data. NVMe all-flash serves data in microseconds, against milliseconds for spinning disk, which is the gap a slow tier imposes on every database and AI job that depends on it.
All-Flash, Hybrid or Object: Choosing by Media
Once the type is settled, the media decides cost and speed. The table below sets out the trade-off.
| Media | Performance | Cost per TB | Best for |
|---|---|---|---|
| All-flash (NVMe) | Microsecond latency, highest throughput | Highest | Databases, virtualisation, AI, latency-sensitive apps |
| Hybrid (flash + disk) | Mixed; flash for hot data | Medium | General workloads where capacity matters as much as speed |
| Scale-out | High throughput, grows to petabytes | Medium | Unstructured data, file at scale, AI datasets |
| Object | Throughput over latency, massive scale | Lowest | Backups, archives, cloud-native data, long-term retention |
Why Enterprise Storage? Why It Matters Now
- The right type for the workload: SAN, NAS, DAS or object, matched to how data is read and written, not one array stretched to fit everything.
- Flash where it counts: NVMe all-flash for latency-sensitive databases and virtualisation, hybrid tiers where capacity matters more than speed.
- Ready for AI: scale-out throughput that feeds GPU clusters, so training jobs are never waiting on storage.
- Ransomware resilience built in: immutable snapshots and replicated copies, so an attack is a recovery rather than a ransom.
- Lower cost through efficiency: deduplication, compression and tiering that cut the capacity you actually buy and power.
- Grows without disruption: scale-out and non-disruptive upgrades, so capacity is added without downtime or a forklift replacement.
Storage is the layer that quietly decides application performance. A database on the wrong storage is slow no matter how fast the server; a virtual environment on an overloaded array stalls every VM on it; an AI training job on storage that cannot keep up leaves expensive GPUs idle. The array rarely fails outright. It just throttles everything that depends on it, and the cause is hard to see from the application.
Proactive Data Systems sizes storage to the workload and the growth ahead. As a NetApp Preferred Partner and Dell Platinum Partner, we design on Dell EMC, NetApp, Hitachi Vantara and HPE, choosing all-flash, hybrid, scale-out or object by what the data actually needs, and building in the snapshots, replication and immutability that protect it.
Storage for AI Workloads
AI changed what enterprises ask of storage. Training reads enormous datasets over and over, so a storage tier that cannot deliver the throughput leaves a costly GPU cluster idle, the most expensive kind of bottleneck. Inference and data pipelines add their own steady demands.
Feeding GPUs needs high-throughput, scale-out storage, with platforms such as NetApp ONTAP and Dell PowerScale built for it, increasingly using direct paths such as GPUDirect Storage that move data to the GPUs without the CPU in the way. Proactive sizes the storage tier to the GPUs it serves, so utilisation stays high and training finishes on time.
Enterprise Storage Across India: Why the Workload Decides the Design
India's enterprises do not store data the same way. A GCC standardising storage across sites is a different problem from a bank under data-residency and retention rules, or a manufacturer consolidating decades of scattered file shares onto one platform.
Data growth, residency and retention rules, mixed legacy estates and budget pressure all shape what good storage looks like here rather than on a datasheet. Proactive has delivered enterprise storage across manufacturing, BFSI, healthcare, IT and ITeS and GCC environments in Delhi, Mumbai, Bengaluru, Pune and Hyderabad, keeping data fast, protected and in-country where regulation requires.
Proactive Data Systems: The Partner That Designs, Delivers, and Protects
Buying an array is easy. Sizing storage to the workload, migrating data without downtime, and protecting it against failure and attack is the part that rewards experience.
Proactive brings over three decades of enterprise infrastructure delivery, certified engineers and an ISO 9001:2015 quality system. As a NetApp Preferred Partner and Dell Platinum Partner, we design and deliver storage on Dell EMC, NetApp, Hitachi Vantara and HPE, all-flash, hybrid, scale-out and object, with data protection and cyber resilience built in.
Storage is one layer of the data center stack. It works alongside Compute Solutions, AI Infrastructure, Converged and Hyperconverged Infrastructure, Data Protection and Cyber Recovery, and Data Center Networking, so capacity, performance and protection are designed together.
From workload assessment and design through migration, optimisation and ongoing support, backed by a 24/7 service desk, Proactive builds storage that keeps data fast, protected and ready for what comes next.
