Form factor, interface and rotational speed before the capacity · review
Hitachi MegaScale DC 4 TB at 7200 rpm, a title printed twice review
A four-terabyte drive whose single bullet reprints its title word for word, publishing every mechanical figure and not one figure about what the drive is specified to withstand.
The bottom line A page with no marketing on it at all, which is refreshing until the figures run out. Everything mechanical is stated; everything about specified duty and support is absent, and the same part number appears elsewhere at another speed.
On the listing
A four-terabyte internal drive in 3.5-inch form, at 7200 rpm with 64 MB of cache on a SATA 6 Gb/s interface; and a single bullet that reprints the same line, capacity, form factor, interface, cache and speed alike.
One line, printed twice
Most listings on this shelf spend five bullets describing what a drive is for. This one spends its only bullet repeating the title. Nothing is overstated because nothing is stated beyond the figures, and the page is either the most honest or the least helpful on the shelf depending on what the reader came for.
The figures that are here
Capacity, form factor, interface, cache, rotational speed. Five values, complete and unambiguous, which is more than one rival on this shelf manages. A buyer who knows what they want can place this drive against another in seconds.
The figures that are not
No workload rating, no MTBF, no warranty term, no acoustic value, no consumption. Those five describe what the drive is specified to withstand and what happens when it does not, and they are the half of a drive specification that this page does not contain.
The same part number, at another speed
This catalogue carries a second listing printing this part number at 5700 rpm. This page publishes 7200, because that is what this seller publishes. The two are reported as they stand, and a buyer who needs the faster spindle should confirm the speed of the drive actually being shipped.
Before ordering
Take the part number to the maker’s datasheet for the workload rating and the MTBF, and ask the seller to confirm the rotational speed of the unit they hold.
Availability
Priced from 130 € to 143 € across the German, Italian and Spanish Amazon stores the day this page was checked.
The American, British and French Amazon stores returned nothing at all, so the buy button there opens a search in that country rather than a page that would not load.
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
Every mechanical figure a buyer needs to place the drive is printed, and printed twice
The part number appears in both the title and the bullet, which makes the maker’s own datasheet easy to find
Nothing on the page is a claim, so nothing on it can mislead: it is a specification line and no marketing at all
Compromises
The single bullet adds nothing whatever to the title, so the page has one source of information rather than two
No workload rating, no MTBF and no warranty, which leaves the entire question of specified duty unanswered
A second listing in this catalogue gives the same part number a different rotational speed, and this page offers nothing that would settle which drive arrives
Specifications
Capacity
4 TB — printed in the title and again in the single bullet, in the maker’s unit. It is reported here in that unit and not converted
Form factor
3.5-inch — printed in the title and in the single bullet, both times beside the word for an internal drive
Height
Not published on the listing — no measurement in millimetres appears, and the form factor is given in inches and left there
Interface
SATA at 6 Gb/s — printed in the title and in the single bullet
Rotational speed
7200 rpm — printed in the title and in the single bullet. A second listing in this catalogue prints the same part number at 5700 rpm, and each page publishes the figure its own seller publishes
Cache size
64 MB — printed in the title and repeated in the single bullet
Stated workload rating
Not published on the listing — no annual figure in terabytes appears, and the page has no sentence about duty at all
Warranty length
Not published on the listing — no term of any length appears in the title or in the single bullet
Stated MTBF
Not published on the listing — no figure in hours appears anywhere on the page
Stated acoustic figure
Not published on the listing — no decibel value appears, and the page carries no claim about noise to stand in its place
Stated idle power
Not published on the listing — no figure in watts appears, and consumption is never raised
Amazon reference
B0856PW8RX (same reference on 3 Amazon marketplaces)
EAN
0714752534439
The questions that come up before an order
Why publish a form factor in inches and no height in millimetres?
Because a 3.5-inch drive has one common height and a bay for it assumes that height. The measurement matters far more on 2.5-inch drives, where 7 mm and 15 mm bodies both exist and a laptop bay will only take one of them. On a desktop drive the inch figure usually settles it, and this page never leaves the desktop.
What is missing when a drive publishes no workload rating?
The duty it is specified for. A workload rating states how much reading and writing per year the maker designs the drive around, and it is what separates a drive meant for continuous service from one meant for a desktop that sleeps at night. Without it, the mechanical figures say how fast the drive is and nothing about how hard it may be worked.
4 TB · 3.5-inch · 7200 rpm · CMR · 256 MB cache · SATA 6 Gb/s · 300 TB per year workload · 255 MB/s sustained
A four-terabyte desktop drive that publishes its recording method, its annual workload rating and its maximum sustained transfer rate, and that carries a recovery service where a warranty term would be.
Best for: A desktop machine that writes a great deal — video work, large game libraries, editing scratch space — where the recording method and the annual duty both need to be known before purchase.
10 TB · 3.5-inch · 7200 rpm · 256 MB cache in the title only · SATA with no rate · one bullet that drops the cache figure
A ten-terabyte enterprise-capacity drive whose single bullet reprints the title and leaves out the cache, and whose interface is named as SATA without a generation or a rate.
Best for: A machine that needs the most capacity per bay available here, where the buyer will confirm the interface generation and the duty figures from the datasheet.
8 TB · 3.5-inch · 7200 rpm · 256 MB cache · 550 TB per year workload · OptiNAND and AllFrame named · interface not published
An eight-terabyte drive with the highest published workload rating in this batch, whose four bullets say nothing about the product and whose interface is never named.
Best for: A machine that writes continuously — a recorder, a surveillance store, a busy archive — where the annual duty figure is the deciding line and the interface can be confirmed elsewhere.
