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The WD Ultrastar DC HC570 WUH722222AL5204 is a 22TB SAS hard drive for data center arrays. It spins at 7200 RPM, links at 12Gb/s, and carries a 512MB cache. WD's part number for it is 0F48052.
The HC570 packs ten platters into a helium-filled case. It uses CMR recording with ePMR, plus OptiNAND flash for ArmorCache power-loss protection. WD rates it for 550TB of workload a year and a 2.5 million hour MTBF.
A SAS drive needs a SAS controller or backplane. A plain SATA port won't accept it. Many JBODs and storage servers are built around SAS, so this model drops straight into them. Our SAS vs SATA guide walks through the differences.
The drive itself tops out at 291 MB/s, so the 12Gb/s link has spare room. That room matters most when several drives share one expander lane. One full pass over 22TB takes about 21 hours at best. WD lists 6.0 W at idle, so twelve drives idle near 72 W.
Ultrastar drives once carried the HGST name. Many labels and older listings still say HGST, but Western Digital now sells the line under its own brand.
| Brand | Western Digital |
|---|---|
| Series | Ultrastar DC HC570 |
| Model number | WUH722222AL5204 |
| WD part number | 0F48052 |
| Capacity | 22TB |
| Interface | SAS 12Gb/s |
| Spindle speed | 7200 RPM |
| Cache | 512MB |
| Sector format | 512e |
| Recording | CMR |
| Security | Base SE |
| Sustained transfer | Up to 291 MB/s |
| Idle power | 6.0 W |
| Weight | 670 g max |
ePMR is WD's enhanced perpendicular recording. It still writes standard, non-overlapping tracks, so the drive counts as CMR.
Only if the NAS has a SAS controller. Most home and small-office NAS boxes use SATA bays, so they can't run this drive.
It means no hardware encryption. The self-encrypting SAS model is WUH722222AL5201, part number 0F48051.
Yes. The SATA drive is WUH722222ALE6L4, part number 0F48155. It matches this one on capacity, speed, and cache.
They sit one digit apart. WUH722222AL5204 is the HC570. WUH722422AL5204 is the HC580 22TB SAS model, part number 0F62791. Check the digit before you install.
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Specifications, part number, condition and included accessories are stated on this page.
Refurbished means a used computer part or device that has been cleaned, checked, and repaired to make sure it works properly again. Unlike regular second-hand items, refurbished products go through testing and fixing so they can perform like new.
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We offer a 30-day return policy subject to the terms and conditions described in our Refund Policy. Restocking fees may apply to eligible non-faulty returns. Kindly take a look at our Return Policy page.
For Brand New items, you will receive them in their original retail box. For Refurbished items, you will receive them in a Brown Box or Bulk Packaging.
Refurbished printers do not come with ink cartridges or toners.
