WUH721818ALE6L1: Western Digital Ultrastar DC HC550 18TB 7200RPM SATA 6Gb/s 512MB Cache 3.5-Inch Hard Drive
MPN: WUH721818ALE6L1|By: Western Digital
Price
Quoted on request
Current pricing within 48 business hours.
In Stockships worldwide
Key specs
- Capacity
- 18TB
- Interface Standard
- 6Gb/s
- Drive Interface
- SATA
- Rotational Speed
- 7200RPM
- Form Factor
- 3.5-Inch
- Condition:
- New (authorized channel)
- Warranty:
- Full manufacturer warranty
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Bulk order? Request volume pricing
Authorized & warrantied
Sourced through authorized distribution, with the full manufacturer warranty.
Compatibility checked
Validated against your server platform before dispatch.
Delivery & lead time
Confirmed with your quote, including expedited freight where available.
Business & public sector
POs, net terms and volume pricing for qualified organizations, government and edu.
Product overview
Western Digital lists WUH721818ALE6L1 as an Ultrastar DC HC550 18TB 7200RPM SATA 6Gb/s 512MB cache 3.5-Inch hard Drive. Carriers and caddies are chassis-specific and are almost never included with a bare drive; this is 3.5-Inch. Give us the server model and we will quote the carrier alongside it instead of letting it hold up the swap.
We return an itemised quote within 48 business hours, and we say plainly when a part is constrained rather than quoting a date we cannot hold.
Specifications
General
- Manufacturer part number
- WUH721818ALE6L1
- Product Type
- Server Hard Drives
- Manufacturer
- Western Digital
Technical specifications
- Capacity
- 18TB
- Rotational Speed
- 7200RPM
- Cache
- 512MB
Interfaces & connectivity
- Drive Interface
- SATA
- Interface Standard
- 6Gb/s
Physical
- Form Factor
- 3.5-Inch
The table below is what the server hard drive is documented as, not what we have inferred from the part number. If the figure you need is missing, ask and we will source it from the manufacturer.
Where the Western Digital WUH721818ALE6L1 is deployed
- Like-for-like replacement of WUH721818ALE6L1 in an existing system
- Migrating an archive tier off failing older disks
- Holding a firmware-matched cold spare per chassis family
Who this part is for
- Backup and archive teams growing bulk capacity in an existing shelf
- Teams standardising a mixed drive estate onto one firmware family
- MSPs holding cold spares across a fleet of identical chassis
What you get ordering this from us
Ordered by part number
WUH721818ALE6L1 is what is quoted and WUH721818ALE6L1 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Firmware family matched
A mechanically identical drive with the wrong firmware is rejected by the controller; we check the family, not just the capacity.
No substitutions without asking
If we cannot supply the exact code we tell you what we can supply and why, rather than shipping an equivalent and letting you find out.
Questions buyers ask about this part
Is WUH721818ALE6L1 genuine and is the warranty intact?
Yes. It ships new in Western Digital packaging, which is what keeps the warranty and the firmware entitlement valid. Anything we cannot supply that way we tell you about before you order.
Will WUH721818ALE6L1 work in my server?
Send the server model or the shelf it is going into. Vendor-keyed firmware is the usual reason an identical-looking drive is rejected, so we check that alongside interface and form factor.
Do you accept purchase orders and quote at volume?
Yes. We quote against a purchase order and hold the price for the quote period, with tiered rates at quantity. Net terms are available once the account is approved.
Compare other Server Hard Drives we stock
| Model | Brand | Key spec | Availability | From |
|---|---|---|---|---|
| Seagate Exos X18 12TB 7200RPM SAS 12Gb/s 512e 3.5-inch Enterprise Hard Drive | Seagate | Capacity: 12TB | In Stock | $280 |
| Toshiba MG09 16TB 7200RPM SATA 6Gb/s 512e 3.5-inch Enterprise Hard Drive | Toshiba | Capacity: 16TB | In Stock | $335 |
| Hitachi HGST Ultrastar He10 8TB 7200 RPM 12Gb/s SAS 512e 3.5"-inch Enterprise Hard Drive | Hitachi | Capacity: 8TB | In Stock | $190 |
| Dell 4TB 7200RPM 12Gb/s SAS 512e 3.5-inch Hot-Plug Nearline PowerEdge Hard Drive | Dell Technologies | Capacity: 4TB | In Stock | $155 |
| HPE 4TB 7200RPM 12Gb/s SAS 512e 3.5-inch LFF Smart Carrier Midline ProLiant Hard Drive | HPE | Capacity: 4TB | In Stock | $155 |
| HP 2TB 7200RPM 6Gb/s SAS 512n 3.5-inch LFF Smart Carrier Midline ProLiant Gen8 Hard Drive | HP | Capacity: 2TB | In Stock | $80 |
Browse all Server Hard Drives or everything we stock from Western Digital.
Specifying a system, not just the part?
Bulk capacity usually sits behind the flash tier that feeds a training cluster rather than under it.