Western Digital · Ultrastar DC HC560 · 512e
WUH722020ALE6L4 is Western Digital Ultrastar DC HC560 20TB SATA-6G. 3 of its 4 segments are defined in Western Digital's published documentation and decoded below; for the rest we have not found a defining document, and they are marked as such. No live listings right now - the reference material below still applies.
| Segment | What it means | Source |
|---|---|---|
| WUH | Ultrastar DC HC series, helium-filled. | Western Digital |
| 722020 | Capacity and generation field. The leading digits encode capacity in the family's own scheme; each model's own specification sheet states its exact capacity. | Western Digital |
| ALE | SATA 6Gb/s interface, 512e sector format. | Western Digital |
| 6L4 | Not sourced - we have not found a Western Digital document defining this segment. | Not sourced |
We decode only what the manufacturer documents. There is a large body of community knowledge about the undocumented segments above, much of it probably right, and none of it published by Western Digital - so it does not appear in this table. A reading nobody can check does not belong in a column headed “what it means”. Grammar reference: Western Digital - Ultrastar model-number nomenclature.
WUH722020ALE6L4 is Western Digital Ultrastar DC HC560, a 20TB hard drive on SATA-6G. It uses the 512e sector format, which decides whether it will drop into an array or controller expecting the other one.
We hold no live listing against this exact part number at the moment. 1 sibling part number is documented below - these are the numbers most often mistaken for this one, and the table marks which fields actually differ.
| Manufacturer | Western Digital |
| Family | Ultrastar DC HC560 |
| Capacity | 20TB |
| Interface | SATA-6G |
| Sector format | 512e |
| Product class | HDD |
These are the part numbers most often confused with WUH722020ALE6L4. The differences below come from the same vendor documentation as the decode above - where a field is not documented, the row leaves it blank rather than guessing.
| Part number | Capacity | Interface | Format | |
|---|---|---|---|---|
| WUH722020BLE6L4 | 20TB | SATA-6G | 512e | reference |
Amber cells differ from WUH722020ALE6L4; grey cells match it.
No seller we track has WUH722020ALE6L4 in stock right now. That describes today's listings only - it says nothing about whether the model is discontinued. We are not going to fill this space with something else and call it a match. The decode, specifications and sibling table above are the reference answer for this part number and remain accurate whether or not anyone is selling one today. If you need the capacity rather than this specific part, the alternatives below are what is actually buyable.
A manufacturer part number does not imply a manufacturer warranty, and this is where part-number buyers lose the most money. OEM stock, integrator pulls and gray-market units all reach the market under the maker's own numbering. Retailers selling them sometimes state plainly that the manufacturer warranty is none; others simply do not mention it, which is not the same as it being covered.
Coverage attaches to the individual unit and its serial number, not to the part number. That means the only reliable answer comes from the manufacturer, about the specific drive you are being sold.
Ask the seller for the serial number before purchase, then enter it in Western Digital warranty checker. We link the tool rather than showing a result here, because the answer depends on the individual drive and only Western Digital can give it.
A seller warranty is a different promise from a different company. What each warranty tier actually covers · Verify on arrival
4 in-stock listings · same capacity and interface, any part number · ranked by live cost per tb, refreshed about once a day
| Drive | Capacity | Interface | Recording | Condition | $/TB | Price | |
|---|---|---|---|---|---|---|---|
| WD Ultrastar 20TB SATA WUH722020ALE604 WUH722020ALE604 | 20TB | SATA-6G | — | REFURB | $31.50 | $630 | Buy on Amazon |
| MDD 20TB SATA 7200RPM NAS MD20TSATA25672NAS | 20TB | SATA-6G | — | REFURB | $32.00 | $640 | Buy on Amazon |
| MDD 20TB SATA 7200RPM NAS MD20TS25672NAS | 20TB | SATA-6G | — | NEW | $32.00 | $640 | Buy on Amazon |
| WD Red Pro 20TB WD201KFGX WD201KFGX | 20TB | SATA-6G | CMR | REFURB | $40.00 | $800 | Buy on Amazon |
Every 20TB drive we track, ranked by cost per terabyte.
WUH722020ALE6L4 is Western Digital Ultrastar DC HC560 20TB SATA-6G. 3 of its 4 segments are defined in Western Digital's own published documentation - the decode table on this page shows each one with the document that defines it. For the remaining segments we have not found a defining document, and we say so rather than repeating a community guess as fact.
The part number cannot tell you - coverage follows how the unit entered the market, not its designation. We track no live listing for WUH722020ALE6L4 right now, so there is no condition evidence to report either way. Check the specific serial with Western Digital's own tool, linked in the warranty section on this page.
WUH722020ALE6L4 and WUH722020BLE6L4 are both in the Ultrastar DC HC560 range. The variant table on this page lists every sibling we document with what differs.
We hold no live listing for this part number right now. That is the honest state rather than a broken page - this remains the reference answer for what WUH722020ALE6L4 is, how it decodes and which siblings it is confused with. The alternatives section below shows what is currently buyable at the same capacity.