WUH721818AL5204: Western Digital Ultrastar DC HC550 18TB 7200RPM SAS 12Gb/s 512MB Cache 3.5-Inch Hard Drive
MPN: WUH721818AL5204|By: Western Digital
Price
Quoted on request
Current pricing within 48 business hours.
In Stockships worldwide
Key specs
- Capacity
- 18TB
- Interface Standard
- 12Gb/s
- Drive Interface
- SAS
- 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
Part number WUH721818AL5204 identifies this Western Digital Ultrastar DC HC550 18TB 7200RPM SAS 12Gb/s 512MB cache 3.5-Inch hard Drive. Rebuild time scales with capacity, so a large drive in a parity group is a longer window of exposure. This one spins at 7200RPM. Tell us the RAID level and group size and we will say plainly whether the geometry still makes sense.
Tell us the deadline you are working to and we will say whether it is achievable before you commit to it internally.
Specifications
General
- Manufacturer part number
- WUH721818AL5204
- Product Type
- Server Hard Drives
- Manufacturer
- Western Digital
Technical specifications
- Capacity
- 18TB
- Rotational Speed
- 7200RPM
- Cache
- 512MB
Interfaces & connectivity
- Drive Interface
- SAS
- Interface Standard
- 12Gb/s
Physical
- Form Factor
- 3.5-Inch
Published specifications for WUH721818AL5204. Anything not listed here we will confirm against the manufacturer's documentation before quoting, because we would rather answer the question than let you assume.
Where the Western Digital WUH721818AL5204 is deployed
- Sourcing WUH721818AL5204 against a build sheet that names it explicitly
- Rebuilding a parity group after a drive failure
- Growing bulk capacity in an existing disk shelf
Who this part is for
- MSPs holding cold spares across a fleet of identical chassis
- Procurement replacing drives out of a maintenance contract
- Backup and archive teams growing bulk capacity in an existing shelf
What you get ordering this from us
Ordered by part number
WUH721818AL5204 is what is quoted and WUH721818AL5204 is what ships; where an alternate code is genuinely the same part we name it rather than swap it silently.
Spares held to a fleet standard
Tell us the chassis you run and we will keep the spare consistent with what is already in the shelf.
Compatibility checked
We confirm the part is supported on your platform before it ships, rather than leaving the check to you.
Questions buyers ask about this part
Is WUH721818AL5204 genuine and is the warranty intact?
Yes. Supplied new and unopened, so the manufacturer warranty and firmware update path stay supported. No grey-market stock and no refurbished units sold as new.
Will WUH721818AL5204 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.