Recording method and stated workload rating are what separate these from desktop drives · review
Seagate IronWolf 4 TB, with three years of warranty and no rotational speed review
A four-terabyte drive for enclosures that publishes an MTBF, a warranty term and a recovery service, and whose only cache and capacity figures in the bullets belong to the range rather than to this model.
The bottom line Generous on the commercial side and thin on the mechanical one. Warranty, recovery and MTBF are all published; rotational speed, cache and recording method are not, and two range ceilings sit where model figures should be.
On the listing
A four-terabyte internal drive for network storage on a SATA 6 Gb/s interface; described as the right answer for demanding enclosures of up to eight bays with several users; a range said to store more and work faster with very high capacity of 16 TB and a cache of up to 256 MB; built for enclosures with less wear, little to no noise and vibration, no delays or downtime and better file transfer performance; a drive health monitoring system with an MTBF of 1 million hours; and a limited three-year product warranty with three years of data recovery services included.
Two ceilings in the same sentence
16 TB of capacity, and a cache of up to 256 MB. Both belong to the IronWolf range. The title sells four terabytes. Reading the bullet quickly gives this drive a cache figure it has never been given, which is why the cache line above records the absence rather than the number. Range ceilings are legitimate marketing and they are not model specifications.
The speed the page never prints
There is no rpm figure here at all. A spinning drive is normally placed by two numbers — how fast it turns and how much cache it carries — and this page publishes neither for the model on sale. It publishes an MTBF instead, which describes a population rather than a mechanism.
Three years, twice, for two different things
The fifth bullet names a limited product warranty and a data recovery service, both of three years. They cover different events: one replaces hardware that fails, the other attempts to retrieve what was on it. Running to the same length does not make them one term, and neither of them is the MTBF figure a bullet earlier.
Two part numbers
The title prints one part number in brackets; the product record carries another, differing by a character. Both are recorded and neither is corrected into the other, because the resemblance between two references is not evidence that they are the same one.
Before ordering
Ask for the rotational speed, the cache of this capacity and the recording method. All three are ordinary figures for a drive of this kind, and this page carries none of them.
Availability
Priced from 205 € to 223 € across the German, French, Italian and Spanish Amazon stores the day this page was checked.
It is stocked on the American and British Amazon stores as well, in that country’s own currency. The range above leaves those out: it counts euro stores and no others.
Every figure in this section is what Keepa held on the day this page was last updated. Stock and prices move without warning.
Prices quoted in this text were read on 10 September 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
A warranty term and an MTBF figure are both published, kept as separate lines and given their own conditions
The bay ceiling of the enclosure the drive is designed for is stated outright, which is a limit rivals usually leave implicit
A data recovery service is included and named with its own duration rather than folded into the warranty
Compromises
No rotational speed anywhere on the page, which is one of the two figures a buyer uses to place a spinning drive
The cache and capacity ceilings of the whole range sit in the same bullet as this model, where they are easy to read as its own
No recording method, on a drive whose first bullet is entirely about multi-drive enclosures
Specifications
Capacity
4 TB — printed in the title, in the maker’s unit and reported here unchanged. The second bullet also prints 16 TB, which it gives as the very high capacity of the IronWolf range and not of this drive
Recording method
Not published on the listing — neither CMR nor SMR appears in the title or in the five bullets, on a drive the first bullet sells for enclosures of up to eight bays, which is where the answer changes what a rebuild does
Stated workload rating
Not published on the listing as a figure in terabytes per year — the first bullet gives an enclosure ceiling of eight bays and several users, which is a deployment limit rather than an annual duty
Rotational speed
Not published on the listing — no rpm figure appears in the title or in any of the five bullets, on a page that does publish an MTBF and a warranty term
Cache size
Not published on the listing as a figure for this drive — the second bullet prints a cache of up to 256 MB in the same sentence as a capacity of 16 TB, and both are ceilings for the range rather than values for the four-terabyte model in the title
Interface
SATA at 6 Gb/s — printed in the title
Warranty length
Three years — stated in the fifth bullet as a limited product warranty, with three years of a data recovery service supplied alongside it. The two terms run to the same length and are named separately
Stated MTBF
1 million hours — stated in the fourth bullet, beside a drive health monitoring feature named by the maker. It is a population statistic in hours, and it is neither the warranty term above it nor a lifespan
Stated idle power
Not published on the listing — no figure in watts appears in the title or in the five bullets
Stated acoustic figure
Not published on the listing as a figure — the third bullet promises little to no noise and vibration, which is a claim without a decibel value behind it
Amazon reference
B09NHV3CK9 (same reference on 6 Amazon marketplaces)
EAN
0763649173817
The questions that come up before an order
Is a cache of up to 256 MB the cache of this drive?
Not as published. The bullet that prints it also prints a capacity of 16 TB, and the title sells a 4 TB drive, so both figures describe the ceiling of the range. Range ceilings and model values are different claims, and this page puts them in one sentence. The cache of this particular drive is not stated anywhere on it.
Are a three-year warranty and a million hours of MTBF two ways of saying the same thing?
No. The warranty is a commercial term with conditions and an end date. The MTBF is a statistic about how often drives fail across a population under defined conditions. Neither is a lifespan, and a drive can fail inside the warranty or run long past any figure derived from the statistic.
4 TB · 5700 rpm · 64 MB cache · SATA 6 Gb/s · 800,000 hours MTBF · refurbished with no operating hours · recording method not published
A refurbished four-terabyte drive that publishes a rotational speed, a cache figure and an MTBF, and that names neither its recording method nor any warranty term.
Best for: A bulk volume in a multi-drive enclosure where the workload is light and steady, bought by someone who has already decided how they will handle a failure.
4 TB · 5400 rpm · SATA 6 Gb/s · tuned for enclosure workloads · no cache, no MTBF, no warranty, no recording method
A four-terabyte drive for enclosures whose title carries every figure the page has, and whose five bullets describe continuous operation, compatibility testing and lower running costs without printing a single value.
Best for: A quiet enclosure in a lived-in room where the slower spindle is wanted deliberately, bought by someone who will get the remaining figures from the maker’s own datasheet.
Wi-Fi 6 · AX3000 over 2976 published · both bands rated · PoE+ with an adapter in the box · wall or ceiling, 176 mm disc · 150 m²
The most completely specified access point here: both band rates, both power routes, a mounting choice and a measured body, with only the stream count left out.
Best for: A flat, office or cafe of about 150 m² wanting one well-documented ceiling unit that will run from a plug if no PoE switch exists.
