Homelab Storage Cost Report 2026

The 100TB Question

100 terabytes has become a common benchmark for serious homelab storage builds. At this scale, drive selection and configuration choices have significant cost implications - the difference between the cheapest and most expensive approach to 100TB can exceed $5,000.

Config 1: Budget Refurb SATA RAID 5

Target: Maximum raw capacity at minimum cost. Suitable for media storage, backup archives, non-critical data.

Config 2: Value New SATA RAID 6

Target: New drives with manufacturer warranty, dual-drive failure tolerance.

Approach: 7 x 20TB new SATA drives in RAID 6 provides approximately 100TB usable. Seagate Exos X20 or WD Ultrastar DC HC570.

Estimated drive cost: $1,400-1,800 total. 5-year warranties from Seagate or WD. New drives with fresh workload ratings reduce correlated failure risk.

Config 3: NAS-Optimized IronWolf Pro

Target: Business NAS deployment with data recovery service, 300TB/year workload rating.

Approach: 6 x 20TB Seagate IronWolf Pro 20TB in RAID 6. Includes 3 years of Rescue Data Recovery Services.

Estimated drive cost: $2,400-3,000 total. Best suited for Synology or QNAP NAS platforms.

Config 4: High Density 24TB

Target: Maximum density with fewer drives. Fewer drives means fewer failure points.

Approach: 5 x 24TB new SATA drives in RAID 5 provides approximately 96TB usable. Seagate Exos X24 is the current highest density SATA option.

Estimated drive cost: $1,500-2,500 total.

Config 5: Enterprise SAS

Target: Production server environment with dual-port redundancy.

Choosing a Platform for 100TB

Synology DiskStation: Purpose-built NAS OS with the best consumer/prosumer software experience. DSM provides a polished web interface, mobile apps, and built-in backup. The DS923+ supports up to 9 drives with expansion and 32GB RAM. Enclosure cost approximately $900-1,100 with expansion unit.

QNAP NAS: More hardware flexibility with PCIe expansion for 10GbE or additional storage controllers. QTS is less polished than DSM but more configurable. TS-664 (6-bay) supports 100TB natively at roughly $600-700.

TrueNAS Scale (custom build): Open-source, ZFS-based. A used Dell PowerEdge R730 or Supermicro chassis with 12-24 bays can be purchased for $300-800 with significantly more processing power than consumer NAS.

UnRAID: Commercial Linux-based NAS OS ($59-129 license). More forgiving of mixed drive configurations than ZFS. Popular for mixed storage/compute deployments.

Networking and Performance Expectations

At 100TB scale, standard gigabit Ethernet (1GbE) saturates at approximately 125MB/s. Upgrading to 2.5GbE costs $30-60 for a compatible switch and nearly doubles throughput. 10GbE provides 1,000+MB/s but at $80-150 per port premium.

Sequential read/write for modern 7200RPM enterprise drives: 200-280MB/s. A RAID 6 array of 6 drives delivers 800-1,200MB/s sequential reads on capable hardware. Random 4K IOPS: 100-200 per drive, 600-1,200 for a 6-drive array.

SSD cache: Both Synology and QNAP support NVMe SSD caching. Adding 2 x 500GB NVMe SSDs dramatically improves random I/O performance for frequently accessed data. Recommended for any deployment with concurrent VM or database use.

Data Protection Beyond RAID

RAID is not backup. RAID protects against drive failure but not accidental deletion, ransomware, controller failure, catastrophic enclosure failure, or logical corruption propagated across all drives.

The 3-2-1 backup strategy requires 3 copies of data on 2 different media types with 1 copy offsite. For 100TB this implies 200TB of backup capacity minimum.

Cloud backup at 100TB scale: AWS S3 Glacier Deep Archive at approximately $100/month. Wasabi at $699/month for 100TB. Cloud backup at this scale is costly - factor into total cost planning. Local backup to a second array or LTO tape is more practical for most homelabs.

The Verdict

For most homelab builders in 2026, the optimal configuration is 6-7 x 20TB new SATA drives in RAID 6 - providing 100-120TB usable storage with dual-drive failure protection, 5-year manufacturer warranties, and the best balance of $/TB and risk profile.