The WD Ultrastar DC HC550 18TB SATA is a 18TB SATA-6G HDD in new condition. It has no current offer on Amazon; the in-stock alternatives nearest its capacity are listed below.
6 in-stock listings · this listing has no current offer on Amazon · ranked by live cost per tb, refreshed every few hours
| Drive | Capacity | Interface | Recording | Condition | $/TB | Price | |
|---|---|---|---|---|---|---|---|
| MDD 18TB SATA 7200RPM Enterprise MDD18TSATA25672E | 18TB | SATA-6G | CMR | REFURB | $27.22 | $490 | Buy/View Price |
| MDD 18TB SAS 12G 7200RPM Enterprise MDD18TSAS25672E | 18TB | SAS-12G | CMR | NEW | $27.22 | $490 | Buy/View Price |
| MDD 18TB SATA 7200RPM NAS MDD18TS25672NAS | 18TB | SATA-6G | CMR | REFURB | $27.22 | $490 | Buy/View Price |
| WD WD Purple 18TB WD180PURZ WD180PURZ | 18TB | SATA-6G | — | REFURB | $28.64 | $515 | Buy/View Price |
| WD DC HC550 18TB SATA 512MB Enterprise WUH721818ALE6L4 | 18TB | SATA-6G | EPMR | REFURB | $28.89 | $520 | Buy/View Price |
| WD WD Red Pro 18TB WD181KFGX WD181KFGX | 18TB | SATA-6G | CMR | REFURB | $29.94 | $539 | Buy/View Price |
| Drive | Interface | Cond | $/TB | Price | |
|---|---|---|---|---|---|
| MDD 18TB SATA 7200RPM Enterprise | SATA-6G | Refurb | $27.22 | $489.99 | Buy |
| MDD 18TB SAS 12G 7200RPM Enterprise | SAS-12G | New | $27.22 | $489.99 | Buy |
| MDD 18TB SATA 7200RPM NAS | SATA-6G | Refurb | $27.22 | $489.99 | Buy |
| WD WD Purple 18TB WD180PURZ | SATA-6G | Refurb | $28.64 | $515.49 | Buy |
All 18TB drives we track, ranked by cost per terabyte.
CMRSource: WD Ultrastar DC data center drives Recording technology for this model
Part of the WD line we track.
The WD Ultrastar DC HC550 18TB SATA is a 18TB SATA-6G enterprise drive at $17.17/TB - CMR recording makes it safe for all RAID levels and NAS deployments. New unit with full 5-year warranty.
We do not have enough in-stock comparators of this type today to place this price against the rest of the market. The category page below ranks everything we do have.
These are third-party figures about the retail market as a whole, quoted and dated. They are not our own measurements and they do not describe this specific drive.
Resolved against manufacturer compatibility lists we read and dated, capped at 4. Vendor-listed means the manufacturer names this exact part number; fit-verified is our own check of form factor, interface and recording technology against a published requirement. Neither is a guess, and a drive the registry cannot resolve shows nothing here rather than a maybe. How compatibility actually works
Yes. The Ultrastar DC HC550 18TB SATA uses ePMR recording which is fully compatible with all RAID levels. It is rated for 550TB/year workload.
5-year manufacturer warranty.
Compatible with any server, NAS or workstation with a SATA port. Works in Synology, QNAP, TrueNAS, UnRAID and all major NAS platforms.