HUS724040ALS640 WD Ultrastar 7K4000 4TB SAS 64 MB 3.5" Server HDD

High-Performance 3.5in Enterprise SAS HDD for RAID Capacity Tiers with the HUS724040ALS640

The HUS724040ALS640 is a 3.5in internal enterprise HDD designed for 24x7 server and storage bays where predictable latency, consistent rebuild behavior, and SAS-managed availability matter more than peak IOPS. As a 7.2K CMR drive with 512n sector formatting, it integrates cleanly into SAS backplanes and controllers, supporting robust error recovery and deterministic behavior in shared storage pools.

In modern CPU platforms, SAS RAID and HBA architectures use PCIe lanes primarily for controller connectivity and queue management; the HUS724040ALS640 complements this by providing a stable capacity tier behind those controllers without stressing memory bandwidth or PCIe expansion budgets. Deployed in multi-bay enclosures, the HUS724040ALS640 enables dense bulk storage while keeping rebuild windows and write amplification under control, making it suitable for mixed read/write transactional streams and sequential throughput in tiered storage designs.

Why Choose the HUS724040ALS640?

The HUS724040ALS640 provides an enterprise-focused balance of capacity density and operational reliability for SAS HDD tiers that back virtualized clusters, backup repositories, and RAID arrays. With CMR recording and 512n formatting, the HUS724040ALS640 is optimized for consistent RAID parity operations, predictable performance under sustained duty cycles, and scalable deployment across homogeneous drive groups.

WD engineers the Ultrastar platform for continuous operation, emphasizing controlled vibration behavior, firmware tuned for enterprise error handling, and long-life mechanics aligned with data centre maintenance cycles. The HUS724040ALS640 supports standardized qualification processes for SAS infrastructure and helps maintain predictable service levels in shared storage environments.

Key Applications:

• SAS RAID arrays for bulk capacity
• Backup and archive repositories
• Virtualization datastores (capacity tier)
• File and object storage nodes
• Mixed transactional and sequential storage pools

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment plan for the HUS724040ALS640, helping you standardize drive populations across shelves and controllers. For large rollouts of HUS724040ALS640 in RAID or storage-node builds, bulk order discounts support cost-controlled scaling without compromising qualification consistency.