Replacement for WD4000FYYZ-01UL1B2: Drop-In Alternatives We Stock
Looking for a replacement for the WD4000FYYZ-01UL1B2 (WD4000FYYZ-01UL1B2 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB 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 WD4000FYYZ-01UL1B2
| SKU | WD4000FYYZ-01UL1B2 |
|---|---|
| Product | WD4000FYYZ-01UL1B2 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive |
| Current price | $244.21 |
| Stock status | In Stock |
| Detail page | View WD4000FYYZ-01UL1B2 › |
Drop-in replacements for WD4000FYYZ-01UL1B2
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.
WD4001FFSX - Western Digital Red Pro 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4001FFSX
Price: $210.53
WD4003FZEX - Western Digital Black 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4003FZEX
Price: $233.68
WD4000F9MZ - Western Digital 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000F9MZ
Price: $262.32
WD4001FFSX-68JNUN0 - Western Digital Red Pro 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4001FFSX-68JNUN0
Price: $288.30
WD4000FYYZ-01U4B2 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYZ-01U4B2
Price: $316.84
WD4000FYYZ-70UL180 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYZ-70UL180
Price: $331.58
WD4000FYYX - Western Digital Re 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYX
Price: $334.24
WD4000FYYZ - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYZ
Price: $336.84
WD4000F9YZ-09N20L1 - Western Digital SE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000F9YZ-09N20L1
Price: $392.99
WD4000FYYZ-01UL1B1 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYZ-01UL1B1
Price: $392.99
WD4000FYYZ-01UL1B3 - Western Digital RE 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4000FYYZ-01UL1B3
Price: $392.99
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.