Replacement for WD181AA: Drop-In Alternatives We Stock
Looking for a replacement for the WD181AA (WD181AA - Western Digital Caviar 18GB 5400RPM ATA-66 2MB 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 WD181AA
| SKU | WD181AA |
|---|---|
| Product | WD181AA - Western Digital Caviar 18GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive |
| Current price | $344.84 |
| Stock status | In Stock |
| Detail page | View WD181AA › |
Drop-in replacements for WD181AA
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.
Western WD102AA Western Digital WD102AA Caviar 10GB 5400RPM IDE Ultra ATA/66 (ATA-5) 2MB Cache 3.5-Inch Hard Drive
SKU: WD102AA
Price: $155.79
WD180ABRTL - Western Digital Caviar 18GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD180ABRTL
Price: $151.95
WD181AA-00AFA0 - Western Digital Caviar 18GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD181AA-00AFA0
Price: $344.84
AC418000-00DWW1 - Western Digital Caviar 18GB 7200RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: AC418000-00DWW1
Price: $102.32
WD418000 - Western Digital Caviar 18GB 7200RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD418000
Price: $191.04
AC418000 - Western Digital Caviar 18GB 7200RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: AC418000
Price: $191.04
AC418000-00DW - Western Digital Caviar 18GB 7200RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: AC418000-00DW
Price: $249.39
WD1533AA - Western Digital Caviar 15.3GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD1533AA
Price: $89.50
WD68AA - Western Digital Caviar 6.8GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD68AA
Price: $113.68
WD75AA - Western Digital Caviar 7.5GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD75AA
Price: $113.68
WD300AA - Western Digital Caviar 30GB 5400RPM ATA-66 2MB Cache 3.5-inch Hard Drive
SKU: WD300AA
Price: $119.03
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.