SAN Storage Array Buying Guide — Enterprise SAN for Small Business in 2026
Complete guide to buying a SAN storage array. Dell EqualLogic, HP MSA, NetApp, and EMC compared. iSCSI vs Fibre Channel, capacity planning, and refurbished SAN deals.
What Is a SAN Storage Array?
A SAN (Storage Area Network) is a dedicated high-speed network that provides block-level data storage to servers. Unlike NAS (Network Attached Storage), which shares files over standard Ethernet, a SAN presents raw disk volumes (LUNs) to servers, making them appear as locally attached drives. This delivers superior performance for databases, virtual machines, and applications that require low-latency storage I/O.
SAN storage arrays are the backbone of enterprise data centers, powering everything from VMware datastores to Microsoft SQL Server clusters. In 2026, refurbished SAN arrays offer small and mid-size businesses access to enterprise storage at a fraction of the original cost.
iSCSI vs Fibre Channel
| Feature | iSCSI SAN | Fibre Channel SAN |
|---|---|---|
| Network | Standard Ethernet (1GbE/10GbE/25GbE) | Dedicated FC fabric (8G/16G/32G) |
| Latency | 0.5-2ms | 0.1-0.5ms |
| Cost | Lower (uses existing switches) | Higher (requires FC switches + HBAs) |
| Complexity | Simpler setup | More complex (zoning, WWN management) |
| Scalability | Easy (add Ethernet ports) | Moderate (FC switch port limits) |
| Best For | SMB, VMware, general workloads | Large databases, mission-critical apps |
Pro Tip: For 90% of small business deployments, iSCSI over 10GbE delivers more than enough performance. Fibre Channel is only worth the extra cost and complexity for high-transaction database environments or when you already have an FC infrastructure.
Top SAN Storage Arrays (Refurbished Market)
Dell EqualLogic PS Series
The Dell EqualLogic PS4110, PS6110, and PS6210 are the most popular entry-level SANs on the refurbished market. They run on iSCSI, include built-in RAID, automatic tiering, and multipath I/O — all managed through a simple web interface. No licensing fees.
- PS4110XV — 24x 2.5" 10K SAS, iSCSI, ideal starter SAN
- PS6110XV — 24x 2.5" 10K/15K SAS, dual controllers
- PS6210 — 24x 2.5" SAS/SSD, 10GbE iSCSI, latest generation
HP MSA (Modular Smart Array)
The HP MSA 2040 and MSA 2050 are mid-range SANs that support both iSCSI and Fibre Channel. Dual controller architecture with automatic failover. Support for SAS and SSD drives.
- MSA 2040 — 24x 2.5" bays, FC/iSCSI, SAS 12Gbps backplane
- MSA 2050 — Updated firmware, improved tiering, flash-optimized
- MSA 2060 — Latest generation, NVMe-ready
NetApp FAS Series
NetApp FAS2700 and FAS8200 arrays are enterprise-grade unified storage (SAN + NAS in one box). NetApp ONTAP software provides snapshots, replication, deduplication, and thin provisioning. More complex but extremely capable.
EMC VNX Series
The EMC VNX5200, VNX5400, and VNX5600 are workhorses of the enterprise SAN market. Unified storage with block and file protocols, auto-tiering (FAST VP), and comprehensive management via Unisphere.
Capacity Planning
| Use Case | Recommended Raw Capacity | RAID Level | Usable Capacity |
|---|---|---|---|
| 10-20 VMs | 4-8TB | RAID 5/6 | 3-6TB |
| 50 VMs | 12-24TB | RAID 6/10 | 8-16TB |
| SQL Server (small) | 2-4TB SSD | RAID 10 | 1-2TB |
| SQL Server (large) | 8-16TB SSD | RAID 10 | 4-8TB |
| File storage + VMs | 12-48TB HDD + 2-4TB SSD | RAID 6 + tiering | 10-35TB |
What to Look For When Buying a Refurbished SAN
- Dual Controllers — Always buy a dual-controller SAN for redundancy and failover
- Drive Count — More spindles = more IOPS, even at smaller capacities
- 10GbE Support — Avoid 1GbE-only iSCSI SANs — they bottleneck quickly
- Firmware Version — Ensure firmware is up to date and not end-of-support
- Drive Type — SAS 10K for general storage, SSD for high-performance tiers
- Cache — More controller cache = better write performance
- Licensing — Some SANs (NetApp, EMC) require software licenses — verify what is included
Key Takeaway: A refurbished Dell EqualLogic PS6110 or HP MSA 2040 with 24x 600GB 10K SAS drives gives you 14TB of usable RAID 6 storage with dual-controller redundancy for under $2,000. That same configuration new would cost $15,000-25,000.
Pro Disk Network carries Dell EqualLogic, HP MSA, NetApp, and EMC SAN arrays with drives, controllers, and all cables included. Every unit is tested with a full health check before shipping. Contact sales@prodisknetwork.com for SAN configuration assistance and volume pricing.