Seagate Exos 24TB: X24, Exos M and the Recertified Sheet Set Apart

Seagate Exos 24TB: two lines share this capacity

A 24 TB Exos can come from either of two Seagate documents. The X24 sheet puts it at the head of a family running down through 20 TB, 16 TB and 12 TB, and markets it as a market-leading 24TB HDD. The Exos M sheet does the reverse: here 24 TB is the entry point, under 28 TB, 30 TB and 32 TB.

Exos M describes itself as the first line to feature 3TB per platter, blending 90% of proven components from earlier generations with Mozaic 3+ technology. Those are statements about the line. We have not found a document giving the platter count of either 24 TB model, so we state none and would not infer one from the capacity.

Seagate Exos 24TB X24 or Exos M: speed, IOPS and power

Same capacity, 45 MB/s apart. On its own sheet the 24 TB is the slowest Exos M, which steps up through 270 MB/s and 275 MB/s to 285 MB/s at the top. Random reads are nearly level at 168 and 170 IOPS, while random writes favour X24 at 550 against 350, and X24 SATA idles 0.6 W lower. If sequential streaming or write-heavy work matters, the X24 figures are the stronger on paper. Neither was measured by us, and warranty does not split them.

Seagate Exos 24TB price: every listing we match on Amazon.co.uk

This one table covers both conditions, lowest price per TB first, in pounds sterling inc VAT, as at 14 November 2026, 02:09 UTC. The Condition column labels each row, so look there before applying any figure above: the X24 and Exos M numbers describe new drives. Where a product name shows a part number, compare it with the grid. Where it does not, get the number from the listing or the seller before you buy.

The Interface column deals with seagate exos 24tb sata or sas where the listing data gives a value. All makers at this capacity are on 24 TB hard drives, and the controller side of the question is handled by 24 TB SAS drives.

In-stock alternatives

None of these is the product this page covers: they are what is in stock on Amazon.co.uk beside it right now. Each row says why it is listed. Check the interface, form factor and part number against your system before buying.

Seagate Exos 24TB recertified: ST24000NM000C, NM001C and NM002C

A third family at this size sits on Seagate's Factory Recertified Hard Drive sheet, a SATA 6 Gb/s table with ST24000NM000C, ST24000NM001C and ST24000NM002C. The support page names ST24000NM000C with a 6-month limited warranty. We have not found a document linking these numbers to X24, Exos M or anything else, and Seagate's programme page says specifications and warranties for prime drives do not apply to recertified products.

These four strings are easy to confuse. The sheets print them as follows, and we have not found a Seagate document that defines the final letter:

• ST24000NM002H: X24, SATA, standard model.
• ST24000NM001H: X24, SATA, SED model.
• ST24000NM001K: Exos M, standard model.
• ST24000NM001C: Seagate's recertified sheet.

Set beside the X24 and Exos M sheets, the recertified sheet drops 8,760 power-on hours a year to 2,400 and 10E15 read errors to 10E14, and Exos refurbished drives carries the full table.

What the used label on a 24 TB listing can and cannot prove

Our used label records how an offer is classed. It does not show who, if anyone, reworked the drive, and it does not show that Seagate did. A title is the seller's own wording, and a matching part number narrows the question without closing it.

Ask one practical thing first: who takes the claim if it fails? Seagate's general warranty page tells buyers to contact the authorised distributor or reseller they purchased from. So the seller's answer matters as much as the number on the label. Serial and label checks, plus SMART testing, are laid out step by step on the refurbished guide linked above.

Two six-month periods that are not the same thing

A recertified 24 TB can bring two six-month figures, and they should not be run together. One is Seagate's 6-month limited warranty, a promise from the maker's documents. The other comes from section 19(14) of the Consumer Rights Act 2015: in a trader-to-consumer sale, goods that do not conform within six months of delivery must be taken not to have conformed on delivery, subject to the exceptions in section 19(15). That statutory point goes with repair, replacement, price reduction and final rejection.

That statutory side rests on Part 1 of the Act, which applies where there is an agreement between a trader and a consumer. Its quality test asks whether the goods meet the standard that a reasonable person would consider satisfactory. A private seller is not a trader, and a business buyer should check its own contract terms.