Under 30 PB on PowerScale?
You're almost certainly overpaying.
Dell has the brand name. TrueNAS Enterprise has the better product — for 95%+ of deployments. Simpler to run, faster to deploy, and structurally cheaper over any 3–5 year horizon.
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Six reasons storage teams choose TrueNAS over PowerScale
Most teams reach out mid-refresh — five years in on Isilon, facing renewal, and doing a real evaluation for the first time.
File, block, and object. One platform. One contract.
Dell PowerScale handles file. Need block? That's PowerStore — a separate product, a separate support contract, a separate renewal. TrueNAS Enterprise delivers NFS, SMB, iSCSI, S3, and NVMe-oF from a single system and a single UI. No extra SKUs. No protocol silos. It just works.
Native unified platformA named engineer. Not a ticket queue.
With Dell, enterprise support means submitting a ticket and waiting. TrueNAS assigns a solutions engineer to your account from day one — someone who knows your environment, answers the phone, and stays on the call until the problem is solved.
4.9/5 Gartner — Support rated #1Real capacity numbers. No assumed compression ratios.
Dell quotes effective capacity using assumed compression — often 5:1 or higher. TrueNAS quotes actual raw capacity. The F-Series scales to 40 PB raw in a single system. What you buy is what you get. No math required at renewal.
Up to 20 PB raw — single systemData integrity built into the filesystem. Not bolted on.
OpenZFS uses 256-bit checksums on every block written to disk, validates on every read, and self-heals silently if corruption is found. No separate integrity layer to license. No silent data corruption. This is how TrueNAS has maintained a zero data loss record across 15+ years.
ZFS self-healing on every readProduction in days. Not quarters.
Enterprise storage procurement usually means months of spec sheets and staged rollouts. TrueNAS ships assigned engineer from deployment and a timeline you can hold someone to. Most teams are in production within days of hardware arriving on-site.
Typical deployment: daysStructurally cheaper. Not just at purchase — at renewal.
OpenZFS foundation, published pricing, and standard hardware mean TrueNAS has no proprietary stack to extract margin from. The TCO advantage compounds over time: 30% lower than PowerScale over a 5-year horizon is structural, not a one-time deal. Ask us to model your environment.
30% lower 5-year TCOWhere the difference shows up most
Teams that have used both consistently say the same thing: the support gap is what they didn't expect.
Dell PowerScale vs TrueNAS Enterprise
Feature-by-feature based on published specs and Gartner data. We've noted where PowerScale leads too.
| Feature | Dell PowerScale / Isilon | TrueNAS Enterprise |
|---|---|---|
| Protocol & Workload Coverage | ||
| File — NFS / SMB | Fully supported | Fully supported |
| Block — iSCSI | Requires separate PowerStore | Native |
| S3 Object Storage | Incomplete Implementation | Native, complete S3 implementation |
| NVMe-oF | Not supported | Native |
| Unified management UI (all protocols) | Per-product only | All protocols, one interface |
| Fibre Channel (NVMe/FC) | ✓ Mature NVMe/FC | ◑ Limited — iSCSI/NVMe-oF recommended |
| Capacity & Connectivity | ||
| Max single-system capacity | Node-limited — must cluster to scale | Up to 40 PB raw, single system |
| Capacity reporting | Effective (assumed reduction ratio) | Actual raw TB — no assumed compression |
| Max per-port network speed | Up to 100GbE | Up to 400GbE (V-Series) |
| NVMe drive support | ✓ Supported | Supported |
| Data Protection & Integrity | ||
| Filesystem-level checksums with self-healing | Not available | ZFS 256-bit checksums on every block/read |
| Snapshot & replication | ✓ Supported | ZFS native — near-zero overhead |
| High availability | ✓ Supported | Supported |
| Encryption at rest | ✓ Supported | ZFS-native encryption |
| Economics & Vendor Model | ||
| Open-source foundation | Proprietary only | OpenZFS |
| Vendor lock-in | High — Dell ecosystem required | Open architecture, standard hardware |
| Transparent pricing | Opaque / quote-based | Published pricing available |
| Typical 3–5 year TCO | Higher — proprietary stack + support costs | 30% lower (structural advantage) |
| Free evaluation tier | Not available | Yes |
| Support & Customer Experience | ||
| Named engineer support | Ticket-based queue | SE assigned at purchase |
| US-based support staff | Mixed / outsourced | Direct US-based engineers |
| Gartner Peer Insights 5-star ratings | 52% | 90% |
| Typical deployment timeline | Weeks to months | Days to production |
Comparison based on publicly available specifications, Gartner Peer Insights data, and TrueNAS product documentation as of May 2026. Claims about Dell PowerScale / Isilon are based on published Dell documentation. Always verify current specs directly with vendors.
We'll tell you if we're not the right fit.
Not every workload belongs on TrueNAS. Here's exactly when we win — and when Dell has a genuine edge.
Clear choice
- ✓ Under 30 PB — simpler, faster, and significantly cheaper than PowerScale
- ✓ You need file, block, and object without buying separate products
- ✓ TCO over 3–5 years is a real factor in the decision
- ✓ Fast deployment matters — production in days, not months
- ✓ Data integrity is mission-critical — ZFS self-healing on every single read
- ✓ You want a support engineer who stays on the call until it's solved
- ✓ Open-source transparency and zero vendor lock-in matter to your organization
- ✓ You want to evaluate the full product free before committing
May be the better choice
- → You need mature Fibre Channel (NVMe/FC) with extensive LUN masking at scale
- → Your environment is deeply invested in Dell APEX / PowerStore ecosystem
- → Active-active HA clustering is a hard architectural requirement
- → You have legacy HDFS / HPC pipelines tightly coupled to Isilon APIs
- → You're over 30 PB and scale-out clustering is core to your long-term strategy
- → Existing Dell enterprise agreements make procurement significantly simpler
Exploring what’s right for you? Talk to one of our engineers. We'll tell you honestly whether TrueNAS is the right fit — and if it isn't, we'll say so. No obligation. No forms. Just a conversation.
Talk to an EngineerDon't take our word for it.
"I have been using TrueNAS for nearly 15 years. In all the years of using this platform, I have never had any issues. There are very few products or companies I promote — but this is one of them."
"Outstanding 15+ years with FreeNAS/TrueNAS — zero data loss, unbeatable ZFS reliability, and over 75% lower TCO than proprietary systems."
"Brief meetings with exceptional turnaround time. A solution perfectly tailored to our needs. I have consistently gone out of my way to recommend this vendor at every new employer."
"TrueNAS is rock solid on both hardware and software. We have never had a controller failure. We have not lost a single byte of data. Support is quick to dispatch replacement drives."
"The system is rock-solid, intuitive to manage, and delivers enterprise-level reliability without enterprise-level complexity."
"The team is excellent to work with. The storage is fast, stable, and the price was right. We started with one unit and liked it so much we bought a second not long after."
Source: Gartner Peer Insights verified reviews for TrueNAS Enterprise. Collected by Gartner, not TrueNAS.
Come benchmark us against your actual workload.
Schedule a complimentary architecture review with a TrueNAS engineer. We'll assess your environment, show you exactly how TrueNAS performs against PowerScale on your specific workloads — and tell you honestly if Dell is the better fit.
Speak directly with an engineer — not a sales rep. No obligation.