Replacement for 370-3863: Drop-In Alternatives We Stock
Looking for a replacement for the 370-3863 (370-3863 - Sun 8GB 5400RPM ATA-66 3.5-inch Hard Drive)? Pro Disk Network ships 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 370-3863
| SKU | 370-3863 |
|---|---|
| Product | 370-3863 - Sun 8GB 5400RPM ATA-66 3.5-inch Hard Drive |
| Current price | $91.20 |
| Stock status | In Stock |
| Detail page | View 370-3863 › |
Drop-in replacements for 370-3863
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.
370-3863-01 - Sun 8.4GB 5400RPM ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: 370-3863-01
Price: $259.50
222-3863 - Dell 1.86GHz 1066MHz FSB 4MB L2 Cache Intel Xeon 5120 Dual Core Processor
SKU: 222-3863
Price: $102.41
ST38411A - Seagate 8GB 5400RPM IDE Ultra ATA/66 (ATA-5) 3.5-inch Hard Drive
SKU: ST38411A
Price: $205.26
370-3693 - Sun 9.1GB 7200RPM 3.5-inch IDE Ultra ATA-66 512KB Cache Hard Drive
SKU: 370-3693
Price: $294.37
9P3006-730 - Seagate Barracuda ATA II 15.3GB 7200RPM IDE Ultra ATA/66 (ATA-5) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9P3006-730
Price: $184.00
9P3006-301 - Seagate Barracuda ATA II 15.3GB 7200RPM IDE Ultra ATA/66 (ATA-5) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9P3006-301
Price: $184.00
9P3006-038 - Seagate Barracuda ATA II 15.3GB 7200RPM IDE Ultra ATA/66 (ATA-5) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9P3006-038
Price: $184.00
9P3006-732 - Seagate Barracuda ATA II 15.3GB 7200RPM IDE Ultra ATA/66 (ATA-5) 2MB Cache (CE) 3.5-inch Hard Drive
SKU: 9P3006-732
Price: $237.49
9P5002-730 - Seagate U8 Series 8.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9P5002-730
Price: $76.00
9M9004-730 - Seagate U4 Series 8.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M9004-730
Price: $76.00
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.