The Western Digital WD400EB-75AUA1 (WD400EB-75AUA1 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive) is a Desktop Hard Drive component engineered for sustained enterprise-class workloads. This part addresses common procurement scenarios where exact-match replacement, capacity expansion, or new-build deployment is required. Technical specifications include spindle speed of 5,400 RPM, form factor of 3.5-inch, cache of 2MB. Common deployment scenarios include database transaction-log volumes, virtualization datastores, OS-boot tier, backup-repository targets, and warm-data tiers in tiered-storage architectures. Pro Disk Network maintains the WD400EB-75AUA1 in our enterprise inventory and verifies each unit against manufacturer datasheet specifications prior to listing. New stock ships factory-sealed where available; refurbished units are tested under load before dispatch and ship with a 90-day Pro Disk Network functional warranty. Same-day dispatch on in-stock orders placed before 3pm ET; free standard ground shipping on US orders over $150.
The WD400EB-75AUA1 is a Western Digital desktop hard drive component with spindle speed 5,400 RPM, form factor 3.5-inch, cache 2MB. Pro Disk Network sells the WD400EB-75AUA1 for $204.38 with same-day US shipping and a 30-day return guarantee.
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Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the WD400EB-75AUA1 are shown on this page.
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Quick Answer: Will the WD400EB-75AUA1 work with my RAID controller?
The WD400EB-75AUA1 operates with any standard SAS/SATA/NVMe-compatible RAID controller (Dell PERC, HPE Smart Array, LSI/Broadcom MegaRAID, Adaptec, IBM ServeRAID, Lenovo ThinkSystem RAID). Mixing this drive in the same RAID volume with drives of different speed/capacity is supported but never recommended.
How fast does the WD400EB-75AUA1 ship?
If in stock, the WD400EB-75AUA1 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The WD400EB-75AUA1 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
VMware vSAN Capacity Tier — Used as bulk storage in all-flash and hybrid vSAN clusters. Pair with NVMe cache-tier drives for SLA-grade write throughput at half the cost of all-NVMe.
Veeam Backup Repository — Cost-optimised backup target for Veeam B&R, Rubrik, or Cohesity primary backup tier. RAID 6 over 8–24 drives delivers 100+ TB usable per server.
Splunk Warm/Cold Tier — Appropriate for Splunk warm/cold/frozen indexes where ingest write rates are below 200 MB/s per node. Avoid for hot-tier indexes — use NVMe instead.
File Server / SMB Shares — General-purpose Windows Server / Samba shares for departmental file storage. RAID 5 for capacity, RAID 10 for IOPS-sensitive workloads.
What is the WD400EB-75AUA1?
The WD400EB-75AUA1 is a Western Digital enterprise-grade hard drive with spindle speed 5,400 RPM and form factor 3.5-inch, manufactured by Western Digital. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of WD400EB-75AUA1
Pros
Free 30-day return window covers DOA + fit issues
Cons
Not enterprise NVMe — sub-100 µs latency workloads need a different SKU
Bulk capacity is the value play, not raw IOPS
Larger orders may ship via LTL freight (signature required)
Frequently Asked Questions about WD400EB-75AUA1
Is the WD400EB-75AUA1 a genuine Western Digital part?
Yes. Pro Disk Network sources every WD400EB-75AUA1 as factory-original Western Digital inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Western Digital servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Will the WD400EB-75AUA1 work with my RAID controller?
The WD400EB-75AUA1 operates with any standard SAS/SATA/NVMe-compatible RAID controller (Dell PERC, HPE Smart Array, LSI/Broadcom MegaRAID, Adaptec, IBM ServeRAID, Lenovo ThinkSystem RAID). Mixing this drive in the same RAID volume with drives of different speed/capacity is supported but never recommended.
How fast does the WD400EB-75AUA1 ship?
If in stock, the WD400EB-75AUA1 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the WD400EB-75AUA1?
New WD400EB-75AUA1 units carry the full Western Digital manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the WD400EB-75AUA1?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the WD400EB series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
WD400EB — WD400EB - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $121.26
WD400EB-00CPF0 — WD400EB-00CPF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $405.26
WD400EB-00DJF0 — WD400EB-00DJF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $204.38
WD400EB-00JEF0 — WD400EB-00JEF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $405.26
WD400EB-00JUF0 — WD400EB-00JUF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $189.47
WD400EB-11CPF0 — WD400EB-11CPF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $344.33
WD400EB-11JEF0 — WD400EB-11JEF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $205.26
WD400EB-11JUF0 — WD400EB-11JUF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $143.39
WD400EB-32CPF0 — WD400EB-32CPF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $248.39
WD400EB-71CPF0 — WD400EB-71CPF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $204.38
WD400EB-75CLB0 — WD400EB-75CLB0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $204.38
WD400EB-75CPF0 — WD400EB-75CPF0 - Western Digital Protege 40GB 5400RPM ATA-100 2MB Cache 3.5-inch Hard Drive — $405.26
Pro Disk Network Buyer’s Guide: Desktop Hard Drive
How to Pick the Right Drive Capacity for Your Use Case
Sizing a storage drive correctly is the difference between a system that runs predictably for five years and one that you replace under emergency conditions at 18 months. For the WD400EB-75AUA1, plan capacity around three numbers: working-set size, retention window, and overhead headroom. Working set is the actively-read data — databases, indexes, hot files. Retention window is how long you keep cold data online before tiering off. Overhead headroom should be 25-30%: drives run noticeably slower above 80% utilisation and metadata operations stall above 90%.
Drive Health Monitoring: SMART, Workload Rating, and Predictive Failure
Workload rating — expressed as TB written per year — matters more than raw capacity in choosing the WD400EB-75AUA1 for sustained-write workloads. Consumer SATA drives are rated for 55 TB/year; enterprise SATA for 180-550 TB/year; enterprise SAS for 550 TB+/year; mixed-use NVMe for 1-3 PB/year over five years. Match the rating to your sustained write profile, then add 30% headroom.