NAS hard-drive comparison
ST8000VN004 vs ST8000VN002 is not simply a newer-model comparison. These two Seagate IronWolf 8TB drives trade rotational speed and error-rate specification against power use, acoustics and home-NAS efficiency. Use this guide to choose the right exact model for your NAS rather than buying whichever listing appears first.
Specifications reviewed September 13, 2026 · Amazon US offers · Verify the exact model before checkout
Quick answer
Which one should you choose?
For ST8000VN004 vs ST8000VN002, choose ST8000VN004 when you want 7,200 RPM, the 210MB/s sustained-transfer rating and Seagate’s stronger 1-per-10^15-bit maximum nonrecoverable-read-error specification. Choose ST8000VN002 when lower power, lower heat and quieter acoustics matter more than the small sequential-speed advantage. Both are 8TB CMR IronWolf drives rated for one-to-eight-bay NAS systems, 180TB/year workload and a three-year warranty.
Seagate IronWolf ST8000VN004
Performance-oriented 8TB NAS use, faster networking, heavier multi-user activity, scrubs and rebuilds.
Seagate IronWolf ST8000VN002
Quiet, lower-power home NAS use, 1GbE media libraries, backups and always-on systems near people.
Before you buy
Four checks that prevent the wrong 8TB purchase
Choose VN004 when
Your NAS has 2.5GbE or faster networking, you value higher rotational speed, or the stronger published URE class matters for your risk profile.
Choose VN002 when
The NAS sits near people, runs 24/7, or one-gigabit networking means lower heat, noise and electricity use matter more than a small sequential-speed gain.
Before checkout
Confirm the exact suffix in the listing or drive label. ST8000VN002 is not ST8000VN0022, and older similarly named IronWolf revisions can have different specifications.
For mixed arrays
A NAS may accept both models, but mixed RPM, acoustics and performance complicate expectations. Prefer matching drives for a new array when practical.
Interactive planning tool
Annual power-cost comparison
Estimate the electricity difference across an always-on array. The calculation blends active and idle power from Seagate’s cited specifications.
Amazon price evidence
Compare exact models and last verified prices
Retail listings can combine capacities, revisions and conditions. Confirm the exact model number, seller, warranty region and final checkout price.
Verified specifications
Side-by-side comparison
| Specification | Seagate IronWolf ST8000VN004 | Seagate IronWolf ST8000VN002 |
|---|---|---|
| Capacity | 8TB | 8TB |
| Recording | CMR, air | CMR, air |
| RPM | 7,200 | 5,400 |
| Max sustained transfer | 210MB/s | 202MB/s |
| Cache | 256MB | 256MB |
| Operating power | 10.1W | 5.3W |
| Idle power | 7.8W | 4.0W |
| Standby/sleep | 1.0W | 0.25W |
| Idle acoustics | 28dBA | 25dBA |
| Seek acoustics | 32dBA | 26dBA |
| Max stated URE rate | 1 per 10^15 bits | 1 per 10^14 bits |
| Weight | 720g | 630g |
| Workload | 180TB/year | 180TB/year |
| MTBF | 1 million hours | 1 million hours |
| Warranty | 3 years | 3 years |
Specifications apply to the exact cited models or current family data sheets. Retail stock can include older revisions, so verify the full model suffix before checkout.
Detailed buying guide
Seagate IronWolf ST8000VN004 vs Seagate IronWolf ST8000VN002: detailed buying guide
Use the sections below for the details that matter after the quick decision, live prices and specification table above.
ST8000VN004 vs ST8000VN002: the differences that actually matter
The primary difference in ST8000VN004 vs ST8000VN002 is not capacity. Both are 8TB Seagate IronWolf NAS hard drives using CMR recording, SATA 6Gb/s, 256MB cache and an air-filled design. Both are positioned for one-to-eight-bay NAS systems, carry a 180TB-per-year workload rating, include rotational-vibration sensing, and are listed with a three-year limited warranty and three years of Rescue Data Recovery Services where that service is available.
What changes is the operating profile. ST8000VN004 spins at 7,200 RPM and is rated for up to 210MB/s sustained transfer. ST8000VN002 spins at 5,400 RPM and is rated at 202MB/s. VN004 also has Seagate’s stronger published maximum nonrecoverable-read-error rate of one per 10^15 bits versus one per 10^14 bits for VN002. VN002 answers back with much lower power draw and lower published acoustics. That is why the better model depends on the NAS, network, drive count and where the enclosure sits.
Quick buying rule: performance favors VN004, efficiency favors VN002
If you need a simple rule, start with the workload. Choose ST8000VN004 for a busier NAS, faster networking, frequent large transfers, heavier multi-user activity, regular scrub or rebuild work, or when the stronger URE specification carries extra weight in your decision. It is the more performance-oriented of the two exact 8TB IronWolf models.
Choose ST8000VN002 for a typical home NAS serving backups, photos, media and documents over 1GbE, especially when the enclosure lives in an office, bedroom-adjacent space or living area. Its lower power and quieter published acoustics improve the part of ownership you experience every hour, while its 202MB/s sustained rating remains well above the practical throughput of a single 1GbE connection.
RPM and real NAS performance: 7,200 does not mean 33% faster
VN004 rotates one-third faster than VN002, but Seagate’s sequential ratings are only 210MB/s versus 202MB/s. That is a useful reminder that RPM is only one input to hard-drive performance. Platter density, firmware, track position, caching and workload shape the result, and random-access latency benefits from higher spindle speed more clearly than a single sequential throughput number suggests.
In a single-drive copy over 1GbE, both models can outrun the network. The distinction becomes more relevant when several drives work in parallel, the NAS has 2.5GbE or 10GbE, multiple clients are active, or local NAS tasks create seeks and queue depth. Do not pay a large premium for VN004 solely because 7,200 RPM sounds dramatically faster; buy it when the rest of the system can use the performance profile.
Power, heat and noise can outweigh the speed difference
Seagate lists ST8000VN004 at 10.1W average operating power and 7.8W idle, compared with 5.3W operating and 4.0W idle for ST8000VN002. Across four or eight always-on drives, that gap becomes meaningful. Higher drive power also becomes heat that the enclosure must remove, so the effect can show up indirectly as more fan activity and more audible system noise.
The acoustic ratings point in the same direction. VN004 is listed at 28dBA idle and 32dBA seek, while VN002 is 25dBA idle and 26dBA seek. Decibels are logarithmic and enclosure vibration changes the sound you actually hear, so the numbers should not be treated as a precise prediction of room noise. They are still useful for choosing an always-on NAS that will sit close to people.
The URE specification: what 10^15 vs 10^14 really means
The maximum nonrecoverable-read-error specification is one of the most important differences between these exact models. Seagate lists ST8000VN004 at one per 10^15 bits and ST8000VN002 at one per 10^14 bits. The VN004 class is therefore stronger on paper, which can matter to buyers thinking about long reads, scrubs and parity rebuilds.
Do not convert those figures into a claim that a particular drive will definitely throw an error after a fixed amount of data. URE is a population specification and real rebuild outcomes also depend on drive health, controller behavior, workload, redundancy and the rest of the array. Use the difference as one risk factor, not a substitute for backup. A NAS array still needs an independent backup regardless of which model you buy.
Which model is better for Synology, QNAP, TrueNAS and Unraid?
Both models are standard IronWolf NAS drives intended for one-to-eight-bay systems, but the final compatibility decision belongs to the NAS or controller vendor. Check the exact model number against the current compatibility list for your Synology, QNAP or other appliance. For TrueNAS and Unraid, verify controller, power and cooling considerations in addition to normal SATA compatibility.
For a small two- or four-bay appliance on 1GbE, VN002 is often the easier fit because it reduces heat and noise without creating a meaningful network bottleneck. In a larger, better-cooled enclosure on 2.5GbE or 10GbE, VN004 becomes more attractive. If your NAS sits in a rack or utility space, the acoustic difference may matter very little compared with performance and specification class.
ST8000VN004 vs ST8000VN002 for Plex and media storage
For Plex libraries, music, photo archives and normal household backups, both drives provide far more sequential throughput than a single compressed media stream requires. Even multiple 4K streams usually do not make spindle speed the deciding factor. The NAS CPU, transcoding path, network and client behavior often matter more.
That makes ST8000VN002 a strong home-media choice when quiet operation and efficiency are priorities. VN004 makes more sense if the same NAS also handles workstation backups, large project files, several simultaneous users or faster-network transfers. The right question is not which drive wins a benchmark; it is whether your broader workload can use VN004’s profile enough to justify its power and noise trade.
RAID rebuilds, scrubs and multi-drive arrays
A rebuild reads substantial amounts of data while the array is already operating with reduced redundancy. Higher spindle speed and the stronger published URE class make VN004 the model many buyers will prefer for a performance-focused parity array. That does not make VN002 unsafe. It means the two models emphasize different trade-offs inside the same consumer NAS family.
For four, six or eight drives, calculate the decision at array scale. A small per-drive price premium becomes a much larger total, and the power gap multiplies across every bay. If uptime and rebuild duration are more important than noise or electricity cost, VN004 has the clearer case. If the NAS is a home backup and media box with good external backups, VN002 can be the more rational system-level choice.
Can you mix ST8000VN004 and ST8000VN002 in the same NAS?
Many NAS systems can operate an array containing both models because capacity and interface match, but “can” and “should” are different questions. Mixed RPM, latency, acoustics and power characteristics make the array less uniform. During many operations, faster members do not turn the whole array into a faster system because work still waits on the slowest relevant member.
For a brand-new array, matching exact models is the cleaner choice when pricing and availability allow it. For an emergency replacement, mixing may be reasonable if the NAS vendor supports both drives and the replacement meets the array requirements. Keep a backup before rebuilding, verify SMART health, and do not assume identical 8TB capacity means identical behavior.
Replacing ST8000VN002 with ST8000VN004 or going the other direction
If one VN002 fails and VN004 is easier to source, moving to VN004 usually increases rather than reduces the individual drive’s performance class, but you still need to check compatibility and array rules. The replacement must be at least as large in usable sector capacity as the member it replaces, and the NAS may have vendor-specific restrictions.
Replacing VN004 with VN002 trades the other way: lower RPM, lower power and quieter operation, but the array can no longer be expected to behave like a matched 7,200 RPM set. For a one-off replacement this may be acceptable; for several replacements over time, decide whether you are intentionally migrating the whole array to a different operating profile rather than creating a permanent mix by accident.
Price thresholds: when the cheaper drive becomes the better buy
Price can overturn a small specification preference. If VN004 and VN002 cost nearly the same, choose by workload: VN004 for performance and URE class, VN002 for efficiency and acoustics. If one model is substantially cheaper, multiply the difference by every bay you plan to populate. A $25 difference becomes $100 in a four-drive set and $200 in an eight-drive set before tax.
Also compare condition, seller and warranty region. Older exact models can appear as new old stock, renewed or recertified inventory. A low headline price is less attractive if warranty coverage is unclear or the seller description does not guarantee the exact suffix. Cloudzat’s live section separates exact-model matches, but the final product page and drive label should still be checked before installation.
Used, renewed and recertified listings need a different risk test
Exact-model searches often surface secondary-market drives long after a revision has been widely deployed. For a backup target or lab system, a properly disclosed renewed or recertified drive can be financially attractive. For a primary NAS holding important data, many buyers will prefer new stock with straightforward manufacturer or authorized-channel warranty coverage.
If you buy used or recertified, inspect SMART data, power-on hours, reallocated and pending sectors, temperature history where available, and run a full surface test before trusting the drive with unique data. Keep in mind that RAID does not turn questionable drives into a backup. The lower acquisition price should buy you enough savings to justify the additional testing and risk controls.
How to identify the exact IronWolf model before you buy
The exact model suffix matters. Look for ST8000VN004 or ST8000VN002 in the retailer title, manufacturer part-number field, product label or SMART identity after installation. Do not rely on “IronWolf 8TB” alone because Seagate has sold multiple 8TB revisions and historic search results can surface similarly named part numbers.
Be especially careful with ST8000VN0022 and other strings that contain the same opening characters. ST8000VN002 and ST8000VN0022 are not interchangeable model numbers. If the seller cannot confirm the exact ST8000VN002 suffix, treat the listing as an unverified IronWolf 8TB rather than assuming the specification table on this page applies.
A guided decision for common NAS setups
For a two-bay or four-bay home NAS on 1GbE in a living space, start with VN002 unless VN004 is materially cheaper. For a four- to eight-bay NAS on 2.5GbE or 10GbE in a utility room, start with VN004. For a quiet backup target that spends much of its time idle, VN002’s lower idle and sleep power are attractive. For a busier shared-storage box, VN004’s faster rotational profile has more opportunity to contribute.
For a replacement inside an existing matched array, start by matching what is already installed. For a completely new array, compare total set price, electricity, noise location and required performance before you buy the first disk. The interactive power calculator above is most useful when you enter your own drive count, active-hours estimate and local electricity rate rather than accepting a generic one-drive comparison.
Bottom line: ST8000VN004 vs ST8000VN002
ST8000VN004 is the better fit when your priority is the faster 7,200 RPM operating profile, the 210MB/s sustained-transfer rating and the stronger published 10^15-bit URE specification. ST8000VN002 is the better fit when you want an efficient 8TB CMR IronWolf for an always-on home NAS, particularly where 1GbE limits single-client throughput and lower heat and noise improve everyday ownership.
Neither model is automatically the “better IronWolf 8TB” in every NAS. Treat the exact model number as a design choice. Match it to network speed, enclosure location, bay count, workload, redundancy strategy and current price, then verify the suffix and condition before checkout. That process will produce a better result than buying on RPM, model age or headline price alone.
Official specifications used
Manufacturer specifications can change by exact model and region. These sources were used for the factual comparison.
Frequently asked questions
Is ST8000VN004 better than ST8000VN002?
ST8000VN004 is better for buyers prioritizing 7,200 RPM, a 210MB/s sustained-transfer rating and Seagate’s stronger published maximum URE specification. ST8000VN002 is better for lower power, lower heat and quieter home-NAS operation.
What is the main difference between ST8000VN004 and ST8000VN002?
VN004 runs at 7,200 RPM and is rated at 210MB/s, while VN002 runs at 5,400 RPM and is rated at 202MB/s. VN002 uses substantially less power and has lower published acoustic figures.
Are ST8000VN004 and ST8000VN002 both CMR?
Yes. Seagate’s current IronWolf data sheet lists both exact 8TB models as CMR, air-filled NAS drives.
Which is quieter, ST8000VN004 or ST8000VN002?
ST8000VN002. Seagate lists 25dBA idle and 26dBA seek for VN002 versus 28dBA idle and 32dBA seek for VN004.
Which uses less power?
ST8000VN002. Seagate lists 5.3W average operating and 4.0W idle for VN002 versus 10.1W operating and 7.8W idle for VN004.
Is ST8000VN004 much faster?
Not in sequential transfer rating. Seagate lists 210MB/s for VN004 and 202MB/s for VN002. The higher 7,200 RPM speed can matter more in latency-sensitive or multi-drive workloads than the sequential numbers alone suggest.
Can I mix ST8000VN004 and ST8000VN002 in the same RAID?
Many NAS systems can use both, but a matched array is easier to reason about. If you mix them, verify vendor compatibility, keep a backup and expect the array to reflect the slower member in many operations.
Which model is better for Plex?
For a typical 1GbE home Plex server, ST8000VN002 is often the more balanced choice because both drives have ample streaming throughput while VN002 uses less power and is quieter. VN004 is more compelling when the NAS also handles heavier shared-storage work.
What does the 10^15 versus 10^14 URE specification mean?
Seagate publishes VN004 with a stronger maximum nonrecoverable-read-error class than VN002. It is a population specification, not a promise that one error occurs after a fixed amount of data, and it does not replace backups or appropriate RAID design.
How do I make sure I am buying the exact model?
Check the seller title, part-number field and drive label for the full suffix ST8000VN004 or ST8000VN002. Do not assume every listing labeled IronWolf 8TB has the same specifications.
Methodology and disclosure
Cloudzat separates standard, Pro, capacity and exact-model results, excludes obvious accessories and SSDs, and does not apply one revision’s RPM, noise or power specification to an entire family. When a later marketplace response omits a previously verified price or image, the last successful evidence remains available instead of disappearing.
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