IronWolf vs BarraCuda: Recording, Workload and Hours at 4, 8 and 16TB

IronWolf vs BarraCuda: the three Seagate sheets behind this page

BarraCuda is not one data sheet but two. DS2131.1 covers 1 to 8TB: its main table holds the 3, 4, 6 and 8TB models and a smaller table holds two 2TB and two 1TB models. DS2131.3 covers 16, 20 and 24TB. IronWolf is on DS1904.23, whose main table runs from 8 to 16TB with a smaller table for 6, 4 and 2TB. The capacities both lines' sheets list are 2, 4, 6, 8 and 16TB, and this page tables 4, 8 and 16TB.

There is a gap in the middle. We have not found a Seagate BarraCuda sheet for 10, 12 or 14TB, so this page prints no BarraCuda row at those sizes, even though Amazon.co.uk listings exist at some of them. The two BarraCuda sheets also differ from each other in a way that matters more than the IronWolf comparison itself: the main table of DS2131.1 lists SMR on every model, whilst DS2131.3 lists CMR.

IronWolf vs BarraCuda at 8TB: SMR against CMR

The ratings all point the same way. The IronWolf table lists CMR on every model, and the BarraCuda 3 to 8TB table lists SMR on every model, including the 8TB ST8000DM004. If you are matching a NAS drive at 8TB, the recording technology alone separates them before price comes into it. The IronWolf table also lists 1-8 drive bays supported and error recovery control marked Yes.

Speed and power are closer. The BarraCuda 8TB, a 5400RPM drive, is listed at 190 MB/s maximum sustained read, a little under both IronWolf 8TB models. On idle power it sits at 3.4 W, below both: ST8000VN004 idles at 7.8 W and ST8000VN002 at 4.0 W. So the BarraCuda is not the slower, hungrier choice here; the gap is in what Seagate rates it to do.

IronWolf vs BarraCuda at 16TB: both CMR, different ratings

At 16TB the recording argument disappears: DS2131.3 lists CMR for the 16, 20 and 24TB BarraCuda models. What remains is the rating. BarraCuda is rated for 120TB/year against IronWolf's 180, for 2,400 power-on hours a year against 8,760, and for a 2-year limited warranty against 3.

On power the 16TB pairing runs the other way from 8TB. The IronWolf idles at 5.1 W against the BarraCuda's 6.7 W, and its operating figure is 7.3 W against 8.9 W, though Seagate labels the two operating rows slightly differently on each sheet. DS2131.3 gives the BarraCuda 16, 20 and 24TB the same power figures and a 512MB multisegmented cache; DS1904.23 gives the IronWolf 16TB 240 MB/s maximum sustained and 28 dBA idle.

IronWolf vs BarraCuda at 4TB

At 4TB the BarraCuda also lists 5400RPM, 55TB/year, 2,400 power-on hours a year and a 2-year limited warranty. The IronWolf 4TB sits on the small table of DS1904.23, which lists 1-8 drive bays and 23 dBA idle for it. The two speed figures are close, 190 against 202 MB/s, and the BarraCuda idles lower, so again the separation is in recording and rating rather than in speed or power.

The same small IronWolf table gives the 6TB model, ST6000VN006, 202 MB/s, 4.0 W idle and 25 dBA idle, and the 2TB model 180 MB/s, 2.8 W and 20 dBA. The BarraCuda 6TB, ST6000DM003, is listed at 185 MB/s and 3.4 W idle, and is SMR like the rest of the DS2131.1 main table.

IronWolf vs BarraCuda for NAS: hours, workload and what Seagate lists each for

The power-on hours row is the plainest guide. A year has 8,760 hours, so IronWolf's figure is a drive rated to run all day, every day. BarraCuda's 2,400 hours is about six and a half hours a day spread across a year, which is the pattern of a desktop PC rather than an always-on NAS. Both BarraCuda sheets print 2,400 at every capacity they cover.

Seagate's applications lists point the same way. Both BarraCuda sheets list desktop or all-in-one PCs, home servers and entry-level direct-attached storage; we have not found NAS in either list. IronWolf's sheet, by contrast, gives a bay range, 1-8 bays. We are not saying a BarraCuda cannot spin in a NAS enclosure; we are saying we have not found a Seagate document that rates it for that job.

• For an always-on NAS: IronWolf, whose sheet rates it for 8,760 hours a year and 1-8 bays.
• For a desktop PC or a drive that is not running all day: BarraCuda's sheet ratings fit that pattern, and the 16TB and larger models are CMR.
• If you are buying a BarraCuda at 3 to 8TB, expect SMR: DS2131.1 lists SMR on every model in that range, and its only CMR entry is the 1TB ST1000DM010.

The warranty gap is one year at every matched capacity: 2 years on both BarraCuda sheets, 3 years on the IronWolf 8 to 16TB table. These are Seagate's limited warranties, the manufacturer's own terms, and separate from anything the seller offers.

BarraCuda and IronWolf prices on Amazon.co.uk

Each line has its own table of new listings, lowest pounds per TB inc VAT first. The BarraCuda table leaves out titles containing Pro, because we have not found BarraCuda Pro on either sheet above. Use the capacity column to compare like with like: the gap between an 8TB BarraCuda and an 8TB IronWolf is the price of the ratings in the table above.

A lowest price per TB is a level and may come from a different capacity on each side, so we print no percentage between them.

The BarraCuda line mixes SMR and CMR models, so do not read the recording technology from the line name. The Recording column prints a technology only where a document ties it to that row's part number. Rows at 10, 12 or 14TB, or at any other size outside DS2131.1 and DS2131.3, carry price and listing data only on this page.

More Seagate comparisons

If IronWolf is already your choice, the next question is usually whether to step up: see IronWolf vs IronWolf Pro. For recording rather than file storage, see IronWolf vs SkyHawk, and for the full IronWolf range, Seagate IronWolf.