# Internal 3.5" HDD Western Digital Ultrastar DC HC550 — 18 TB, SAS 6 Gbit/s, 7200 RPM, 512 MB cache

**URL:** https://aio.lv/en/product--western-digital-0f38353-ob--4182147
**Data updated:** 2026-01-21 10:56 (EET)
**Category:** Hard Disk Drives (HDD)
**Manufacturer:** Western Digital
**Manufacturer code:** 0F38353-OB
**EAN:** 8717306633321
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 797.99 €
**Prices and availability valid until:** 2026-08-22 23:59
**Price without VAT (21%):** 659.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--western-digital-0f38353-ob--4182147

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.08.2026 | free |
| Pickup points | 11.08.2026 | 1.79 EUR |
| Courier delivery to door | 11.08.2026 | 4.99 EUR |

## Summary description

Enterprise-class 3.5" internal hard drive Western Digital Ultrastar DC HC550 with 18 TB capacity. SAS 6 Gbit/s interface, 7200 RPM spindle speed and 512 MB buffer deliver sustained transfer up to 267 MiB/s and average transfer ~600 MB/s. Designed for servers and workstations, MTBF 2,500,000 h, typical power 6 W, operating temp 5–60 °C. Suitable for high-density storage, backup and virtualization.

## Long description

The Western Digital Ultrastar DC HC550 is an enterprise 3.5" SAS internal hard drive with 18 TB capacity, 7200 RPM speed and a 512 MB cache. Designed for public and private cloud and hyperscale data centers, this HDD uses HelioSeal technology on a 9-disk platform and integrates Energy-Assisted Magnetic Recording (EAMR) and a Triple Stage Actuator (TSA) to provide high areal density, reliable operation and optimized total cost of ownership for large-scale data workloads.
Advantages
The Ultrastar DC HC550 delivers up to 18 TB of storage in a standard 3.5" form factor, enabling high storage density and drop-in compatibility with server and storage systems. It offers lower idle power per terabyte compared with previous air-filled drives and a higher MTBF rating for improved reliability. The combination of EAMR, TSA and HelioSeal results in increased areal density and reduced overall TCO for data center deployments.
Suitable for
Cloud and hyperscale data center storage
Enterprise servers and storage arrays
Big Data and analytics workloads
Archive and cold storage tiers
Key specifications
Capacity: 18 TB (18,000 GB)
Form factor: 3.5"
Interface: SAS
Rotation speed: 7200 RPM
Cache: 512 MB
MTBF: 2,500,000 hours
Weight: 0.69 kg
Manufacturer MPN: 0F38353-OB
EAN: 8717306633321
How to use
Install the Ultrastar DC HC550 into a compatible 3.5" SAS bay following your server or storage system vendor’s installation procedure. Ensure proper orientation, secure mounting and correct SAS connections. Initialize and format the drive according to the operating system or storage controller requirements before use. For arrays, follow RAID configuration and rebuild procedures recommended by your storage platform.
Usage recommendations
Use this drive in environments that provide proper cooling and vibration control. For optimized power efficiency and longevity, employ firmware and driver updates from Western Digital and follow the data center’s power management and monitoring practices.

## Specifications

### Features

| Feature | Value |
|---|---|
| HDD capacity | 18000 GB |
| HDD size | 3.5 |
| HDD speed | 7200 |
| Mean time between failures (MTBF) | 2500000 h |
| Average latency | 4.16 ms |
| Start/stop cycles | 600000 |
| HDD interface transfer rate | 12 Gbit/s |
| Component for | Server/workstation |
| Workload rate limit | 550 TB/year |
| Interface | SAS |
| Type | HDD |
| Noise level (idle) | 2 dB |
| Storage drive buffer size | 512 MB |
| 24/7 operation | Yes |

### Operational conditions

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -40 - 70 |
| Operating temperature (T-T) | 5 - 60 |
| Operating shock | 50 G |
| Non-operating shock | 250 G |
| Non-operating vibration | 1.04 G |
| Operating vibration | 0.67 G |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.69 kg |
| Height | 26.1 mm |
| Width | 101.6 mm |
| Depth | 147 mm |

### Power

| Feature | Value |
|---|---|
| Operating voltage | 5 V |
| Power consumption (idle) | 5.6 W |
| Power consumption (read) | 6.5 W |
| Power consumption (write) | 6.5 W |

### Packaging data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Packaging content

| Feature | Value |
|---|---|
| Manual | Yes |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84717050 |

## FAQ

### How much does the Western Digital Ultrastar DC HC550 18 TB 3.5" SAS HDD cost, and is it available for purchase?

The price is 797.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Western Digital Ultrastar DC HC550 18 TB 3.5" SAS HDD be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Western Digital products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Western Digital service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: hdd capacity, hdd size, hdd speed, mean time between failures (mtbf), weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Western Digital Ultrastar DC HC550 18 TB 3.5" SAS HDD?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/4182147/62634663_large.webp