22TB SAS Drive: Ultrastar HC570 and HC580, Exos X22 and Toshiba MG11 Part Numbers

22TB SAS HDD part numbers: four lines side by side

The three makers identify a 22 TB SAS drive in different ways. WD gives each Ultrastar both a short part number and a long model number, while Seagate and Toshiba give each drive one part number with the capacity inside it. This is what each document prints at this size.

The HC580 short numbers need one caution. WD's sheet prints its eight model numbers and then its eight part numbers in the same order, without a line joining each pair, and the 22 TB SAS pair falls last: WUH722422AL5201 and WUH722422AL5204 above, 0F62790 (SED) and 0F62791 (Base SE) below. Reading by that printed order, 0F62791 is the 22 TB SAS Base SE drive. WD's en-GB page labels 0F62802 as 24 TB SAS Base (SE) and 0F62785 as 22TB SATA Base (SE), which fits the same order.

The long numbers carry their own trap. WUH722422AL5201 and WUH722424AL5201 differ only in the capacity digits, 22 against 24, so a single misread digit buys the wrong drive. Seagate's pair is closer still: ST22000NM000E is the SAS model and ST22000NM001E the SATA one, one digit apart, and the X22 sheet puts Dual in its SAS columns and Single in its SATA columns.

Is a 22TB SAS drive CMR? Yes, on all four sheets

Each maker says so in its own words. WD describes the HC570 as delivering 22TB capacity with CMR recording format, and the HC580 as 24TB / 22TB on a 10-disk CMR drive. Seagate's X22 sheet reads Yes on its Conventional Magnetic Recording row for all four models, ST22000NM000E among them. Toshiba describes the MG11 series as using Conventional Magnetic Recording for broad compatibility.

Rows titled MG10SFA22TE sit outside those four statements. We have not found a Toshiba document for that number, so neither the CMR line nor any other figure on this page covers it, and its interface is worth confirming with the seller.

22TB SAS hard drive price on Amazon.co.uk

The table above holds 4 listings right now. Every price is pounds sterling inc VAT, and the condition is printed on each row. A row titled 0F62791 is, on the HC580 sheet's printed order, the 22 TB SAS Base SE drive.

WD Ultrastar 22TB SAS: HC570 or HC580

Both WD generations make a 22 TB SAS drive, and the idle figures are the clearest difference between them.

On these sheets the HC580 idles 0.2 W below the HC570 in SAS. Choosing SAS over SATA costs 0.3 W at idle on both generations, so the interface carries a small, consistent power price. WD also prints 0.24 W/TB for the 24 TB HC580 in SAS, so at idle the larger drive is the more efficient per terabyte.

WD prints a five-year limited warranty on both sheets. Read it as the maker's term for a new HC570 or HC580, which a given Amazon offer may or may not carry; your statutory rights are a separate matter. The Ultrastar DC HC570 and Ultrastar DC HC580 pages set out each family at every capacity, and the 24TB SAS drive page compares the next size up.

Seagate Exos 22TB SAS: the X22

Seagate's 22 TB SAS drive is the Exos X22 ST22000NM000E. It shares its standard-model row with ST20000NM000E, which sits in the second Dual-port column beside it, so the X22 is a Seagate SAS option at 20 TB as well.

If no row in the table shows ST22000NM000E, that is the number to search for. For the next Seagate capacities, the 20TB SAS drive page covers the X20 and the X24 generation.

Toshiba 22TB SAS: MG11, and the MG10 listings

Toshiba's MG11 overview lists MG11SCA22TE as SAS-3.0, 22 TB, with 512e sectors. If your array expects a particular sector size, that row is the one to check against your controller.

Listings with an MG10 number are a separate question, for the reason given above. The Toshiba MG10 page covers the documented MG10 models.

Controller and returns: a 22TB SAS checklist

Make sure the bay is wired to a SAS controller, because Seagate's knowledge base is blunt that SAS drives cannot be plugged into SATA controllers; SAS vs SATA has the full picture.

Where a trader sells to a consumer, Part 1 of the Consumer Rights Act 2015 applies, and the time limit for the short-term right to reject faulty goods is the end of 30 days unless an exception applies. The 18TB SAS drive page covers who counts as a consumer.