
WUH721818AL5204 - WD Ultrastar DC HC550 18TB 7200RPM SAS 3.5" HDD
SKU WUH721818AL5204
Western Digital WUH721818AL5204 Ultrastar DC HC550 18TB 7200RPM 12Gb/s SAS 512MB Cache 512 3.5-Inch Hard Drive
Ultrastar DC HC550 WUH721818AL5204 is a high-performance 7200 RPM drive offering 18TB capacity. With SAS 12Gb/s interface, it delivers reliable, high-speed data transfer for traditional and cloud-based data centers. HelioSeal technology enhances efficiency and longevity, while the 3.5-Inch form factor ensures seamless integration.
- 512MiB Memory
- Fluid Dynamic Bearing motor
- Automatic Actuator lock
- Triple Stage Actuator
- PSID support for secure data management
- S.M.A.R.T. monitoring drives health to predict failures.
- RVS maintains performance in high-vibration environments
- Power saving modes/Low RPM idle mode (APM) reduces power consumption
General Information
| Product Line | Ultrastar |
|---|---|
| Product Series | DC HC550 |
| Product Type | Hard Drive |
Technical Information
| Storage Capacity | 18 TB |
|---|---|
| Cache Storage | 512 MB |
| Disk Format | 512 |
| Maximum Data Transfer Rate | 12 Gb/s |
| RPM | 7200 |
| Drive Type | Internal |
| Drive Width | 3.5" |
Interfaces/Ports
| Drive Interface | SAS |
|---|---|
| Interface Standard | 12Gb/s SAS |
Physical Characteristics
| Form Factor | LFF |
|---|
Miscellaneous
| Compliance Standards | RoHS, WEEE |
|---|
Also known as — equivalent part numbers
This part is sold under the following identifiers. Search any of them to reach this page.
- Primary part number
- WUH721818AL5204
Warranty
Warranty included, backed directly by SAHS. See our Warranty Policy for details.
Returns
Contact our team with your order details and we'll walk you through the process — see our Shipping & Returns page and policies for full details.
Related Server Hard Drives
RefurbishedHUH721010AL4200 - WD Ultrastar DC HC510 10TB 7200RPM SAS 3.5" HDD
New0B28953 - WD Ultrastar C15K600 600GB 15000RPM SAS 2.5" HDD
RefurbishedHUS726040AL5210 - Western Digital 4TB 7200RPM SAS 12Gb/s 3.5-in HDD
Refurbished0F22798 - Western Digital 2TB 7200RPM SAS 12Gb/s 3.5-in Hard Drive
RefurbishedHUC101890CSS200 - WD Ultrastar C10K1800 900GB 10000RPM SAS 2.5" HDD
RefurbishedHUC101812CSS200 - WD Ultrastar C10K1800 1.2TB 10000RPM SAS 2.5" HDD
RefurbishedHUC156030CSS204 - WD 300GB 15000RPM SAS 12Gb/s 2.5-in Hard Drive
New0F27358 - Western Digital 8TB 7200RPM SAS 12Gb/s 3.5-in Hard Drive
QuoteWD9001BKHG-18D22V1 - Western Digital 900GB 10K SAS 6Gb/s 2.5-in HDD
NewHUS726060AL5210 - WD Ultrastar 7K6000 6TB 7200RPM SAS 3.5" HDD
NewHUS724020ALS640 - Western Digital 2TB 7200RPM SAS 6Gb/s 3.5-in HDD
RefurbishedHUC101860CSS200 - Western Digital Ultrastar 600GB 10K SAS 2.5-In HDD
- HUS724030ALS640 - WD 3TB 7200RPM SAS 6Gb/s 3.5-in HDD
- HUC101812CSS204 - WD 1.2TB 10KRPM SAS 12Gb/s 2.5-in HDD
- 0F29530 - Western Digital Ultrastar He12 12TB 7200RPM SAS 3.5-Inch HDD
- WD3000BKHG - Western Digital Caviar S25 300GB 10000RPM SAS 2.5" HDD
- WD6000BKHG - Western Digital S25 600GB 10000RPM SAS 2.5-Inch HDD
- HUS726T4TAL5204 - Western Digital 4TB 7200RPM SAS 12Gb/s 3.5-in HDD
- HUC156060CSS200 - WD Ultrastar C15K600 600GB 15000RPM SAS 2.5" HDD
- 01NN116 - IBM 1.8TB 10000RPM SAS 12Gb/s 2.5-in Hard Drive
- 01EJ017 - IBM 900GB 10000RPM SAS 12Gb/s 2.5-in Hard Drive
- 03N5285 - IBM 146.8GB 15000RPM SCSI 320MB/s 3.5-in Hard Drive
- 01EJ024 - IBM 1.2TB 10000RPM SAS 6Gb/s 2.5-Inch Hard Drive
- 01EJ019 - IBM 900GB 10000RPM SAS 12Gb/s 2.5-in Hard Drive
- 00NA500 - Lenovo 2TB SAS 7200RPM 2.5-Inch Hard Drive
- 00YK024 - Lenovo 2TB 7200RPM SAS 12Gb/s 2.5-in Hard Drive
- 24P3729 - IBM 36.4GB 15000RPM SCSI 320MB/s 3.5-in Hard Drive
- 03N5287 - IBM 146.8GB 15000RPM SCSI 320MB/s 3.5-in Hard Drive
- 0B24476 - HGST 300GB 15000RPM Fibre Channel 4Gb/s 3.5-in Hard Drive
- 03N6335 - IBM 300GB 10000RPM SCSI 320MB/s 3.5-in Hard Drive
- 03N6345 - IBM 73.4GB SCSI 15000RPM 3.5-Inch Hard Drive
- 242603-001 - Compaq 2.1GB 7200RPM SCSI U160 80p 3.5-in Hard Drive
- 2072-ACLC - IBM 600GB 15000RPM SAS 12Gb/s 2.5-Inch Hard Drive
- 0B23666 - HGST 600GB 15000RPM Fibre Channel 4Gb/s 3.5-in Hard Drive
- 03N5282 - IBM 73.4GB 15000RPM SCSI 320MB/s 3.5-in Hard Drive
- 03N5275 - IBM 36.4GB 15000RPM SCSI 320MB/s 3.5-in Hard Drive