
WUH721818AL5201 - WD Ultrastar DC HC550 18TB 7200RPM SAS 3.5" HDD
SKU WUH721818AL5201
Western Digital WUH721818AL5201 Ultrastar DC HC550 18TB 7200RPM 12Gb/s SAS 512MB Cache 512 3.5-Inch Hard Drive
Ultrastar DC HC550 WUH721818AL5201 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 |
| Encryption Algorithm | Self-Encrypting Drives (SED) |
| 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
- WUH721818AL5201
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
QuoteWUH722222ALE601 - WD Ultrastar DC HC570 22TB SATA 3.5" HDD
Quote0F48153 - Western Digital 22TB SATA 6Gb/s 3.5" Hard Drive
Refurbished0F62790 - Western Digital Ultrastar DC HC580 22TB 7200RPM SAS 3.5" HDD
QuoteWUH722016CL5201 - WD 16TB 7200RPM SAS 12Gb/s 3.5" Hard Drive
RefurbishedWUH721818ALE601 - WD Ultrastar DC HC550 18TB 7200RPM SATA 3.5" HDD
Quote0F48151 - Western Digital Ultrastar DC HC570 22TB SATA 3.5-Inch HDD
Refurbished0F62798 - WD Ultrastar DC HC580 24TB 7200RPM SATA 3.5" HDD
QuoteWUH722222ALE6L1 - WD Ultrastar DC HC570 22TB 7200RPM SATA 3.5" HDD
NewWUH722014CL5204 - WD 14TB 7200RPM SAS 12Gb/s 3.5" Hard Drive
RefurbishedWUH722422AL5201 - WD Ultrastar DC HC580 22TB 7200RPM SAS 3.5" HDD
RefurbishedWUH722424ALE604 - WD Ultrastar DC HC580 24TB 7200RPM SATA 3.5" HDD
New0B47078 - Western Digital Ultrastar DC HA340 8TB 7200RPM SATA 3.5" HDD
- WD241PURP - Western Digital Purple Pro 24TB 7200RPM SATA 3.5-Inch HDD
- WUH722420AL5200 - Western Digital 20TB 7200RPM SAS 3.5-Inch Hard Drive
- 0F59373 - Western Digital Ultrastar DC HC590 24TB 7200RPM SAS 3.5" HDD
- WD202KFGX - Western Digital Red Pro 20TB 7200RPM SATA 3.5-Inch HDD
- WUS721208BLE6L4 - WD Ultrastar DC HA340 8TB 7200RPM SATA 3.5" HDD
- 0B47749 - Western Digital Ultrastar DC HC555 20TB 7200RPM SAS 3.5" HDD
- 0F38752 - Western Digital 20TB 7.2KRPM SATA 6Gb/s 3.5-inch HDD
- ST373454LC - Seagate 73GB 15000RPM SCSI 320MB/s 3.5-in HDD
- ST1800MM0149 - Seagate Performance 10K 1.8TB SAS SED FIPS 2.5" HDD
- 9ZM275-037 - Seagate 2TB 7200RPM SAS 6Gb/s 3.5-in Hard Drive
- AL14SXB30EN - Toshiba 300GB 15K SAS 12Gb/s 128MB Cache 2.5-in HDD
- ST373454LW - Seagate Cheetah 15K.4 73.4GB 15000RPM SCSI 3.5-Inch HDD
- ST6000NM0004 - Seagate 6TB 7200RPM SATA 6Gb/s 3.5-inch Hard Drive
- 9SV066-002 - Seagate 146GB 15000RPM SAS 6Gb/s 64MB Cache 2.5-in HDD
- 1A9268-041 - Seagate 2TB 7200RPM SAS 6Gb/s 3.5-in Hard Drive
- ST8000NM0135 - Seagate 8TB 7200RPM SAS 12Gb/s SED FIPS 140-2 3.5" HDD
- ST336704LW - Seagate 36.7GB 10000RPM SCSI 160MB/s 3.5-in Hard Drive
- N9VVV - Dell 900GB 10000RPM SAS 12Gb/s 2.5-in Hard Drive
- 9FJ066-050 - Seagate 146GB 10K SAS 6Gb/s 16MB Cache 2.5-in HDD
- HUH721212AL5201 - WD 12TB 7200RPM SAS 12Gb/s 3.5-in Hard Drive
- 0F29563 - Western Digital Ultrastar DC HC520 12TB 7200RPM SAS 3.5" HDD
- 0F29532 - HGST Ultrastar DC HC520 12TB SAS 7200RPM 3.5-Inch Hard Drive
- HUH721212AL4205 - WD Ultrastar DC He12 12TB 7200RPM SAS 3.5" HDD
- HUH721212AL5204 - WD Ultrastar DC HC520 12TB 7200RPM SAS 3.5" HDD