# Internal Hard Drive HPE 4 TB 3.5" SAS 7200 RPM 861756-B21-RFB

**URL:** https://aio.lv/en/product--hp-enterprise-861756-b21-rfb--11101164
**Data updated:** 2026-01-12 19:33 (EET)
**Category:** Hard Disk Drives (HDD)
**Manufacturer:** HP Enterprise
**Manufacturer code:** 861756-B21-RFB
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 311.49 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 257.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hp-enterprise-861756-b21-rfb--11101164

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

The HPE 861756-B21-RFB internal hard drive offers a capacity of 4 TB and operates at a speed of 7200 RPM. This 3.5" SAS drive is designed for high-performance storage solutions, providing reliable data access and transfer rates. Ideal for enterprise environments, it ensures efficient data management and supports demanding applications with ease.

## Long description

The Internal Hard Drive HPE 4 TB 3.5" SAS 7200 RPM 861756-B21-RFB is a 3.5-inch serial-attached SCSI (SAS) hard disk drive from HP Enterprise with 4 TB capacity and a spindle speed of 7200 RPM. Engineered for server and storage array deployments, this enterprise-class HDD provides sustained throughput and predictable latency for business-critical workloads. The drive fits standard 3.5" bays and uses the SAS interface to support multi-drive arrays and RAID configurations commonly used in data centers.
Advantages
This HPE 861756-B21-RFB drive offers a high-capacity 4000 GB storage within a 3.5" form factor and a 7200 RPM spindle speed that balances performance and power consumption. The SAS interface delivers improved reliability and better error recovery compared with consumer interfaces. The drive is compatible with HP Enterprise servers and storage enclosures that accept SAS 3.5" HDDs and carries the manufacturer part number (MPN) 861756-B21-RFB for accurate procurement.
Suitable for (tasks / use cases)
Database storage and transaction logging in enterprise servers
Storage arrays and RAID configurations in data centers
Backup repositories and nearline archival storage
Virtualization host storage where consistent throughput is required
Key specifications
Brand: HP Enterprise
Model / MPN: 861756-B21-RFB
Capacity: 4000 GB (4 TB)
Form factor: 3.5"
Interface: SAS
Spindle speed: 7200 RPM
Category: HDD
How to use
Install the drive into a compatible 3.5" SAS bay in an HP Enterprise server or storage enclosure following the vendor's installation procedures. Ensure the server is powered down or that hot-swap procedures are observed if supported by the system. Configure the drive within the host RAID controller or storage management utility to create volumes or add to existing arrays. Initialize and format the new volume at the operating system level according to application requirements and perform any necessary firmware updates recommended by HP Enterprise.
Usage recommendations
For reliable operation, use this HPE 861756-B21-RFB drive in environments with appropriate cooling and vibration controls. Monitor drive health through the server's management tools (such as HPE iLO or storage controller utilities) and include the drive in routine backup and redundancy plans to protect data against failures.

## Specifications

### Features

| Feature | Value |
|---|---|
| HDD capacity | 4000 GB |
| HDD size | 3.5 |
| HDD speed | 7200 |
| HDD interface transfer rate | 12 Gbit/s |
| Component for | Server/workstation |
| Interface | SAS |
| Type | HDD |

### Packaging data

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

## FAQ

### How much does the Internal Hard Drive HPE 4 TB 861756-B21-RFB cost, and is it available for purchase?

The price is 311.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 20.07.2026 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. All transactions are 100% secure and encrypted.

### 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 HP Enterprise 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 HP Enterprise 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, 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.

## Image

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