Replacement for WD40001ABYS: Drop-In Alternatives We Stock
Looking for a replacement for the WD40001ABYS (WD40001ABYS - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive)? Pro Disk Network ships Western Digital drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the WD40001ABYS
| SKU | WD40001ABYS |
|---|---|
| Product | WD40001ABYS - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive |
| Current price | $207.50 |
| Stock status | In Stock |
| Detail page | View WD40001ABYS › |
Drop-in replacements for WD40001ABYS
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
WD4000YS - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000YS
Price: $182.37
WD4001ABYS - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4001ABYS
Price: $189.47
WD4000AAKS - Western Digital Caviar SE16 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKS
Price: $195.63
WD4000YS-01MPB0 - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000YS-01MPB0
Price: $211.00
WD4000AAKS-00TMA0 - Western Digital Caviar SE16 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKS-00TMA0
Price: $217.89
WD4000YS-01MPB1 - Western Digital RE2 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000YS-01MPB1
Price: $247.58
WD4000AAKSFR - Western Digital Caviar Blue 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKSFR
Price: $278.01
WD4000ABYS-01TNA0 - Western Digital RE 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000ABYS-01TNA0
Price: $282.20
WD4000AAKS-00YGA0 - Western Digital Caviar SE16 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKS-00YGA0
Price: $291.79
WD4000AAKS-00A7B0 - Western Digital Caviar SE16 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKS-00A7B0
Price: $307.59
WD4000AAKS-00C8A0 - Western Digital Caviar SE16 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000AAKS-00C8A0
Price: $307.71
WD4000ABYS - Western Digital RE 400GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD4000ABYS
Price: $349.43
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.