Replacement for 370-3863-01: Drop-In Alternatives We Stock
Looking for a replacement for the 370-3863-01 (370-3863-01 - Sun 8.4GB 5400RPM ATA-66 512KB Cache 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 370-3863-01
| SKU | 370-3863-01 |
|---|---|
| Product | 370-3863-01 - Sun 8.4GB 5400RPM ATA-66 512KB Cache 3.5-inch Hard Drive |
| Current price | $259.50 |
| Stock status | In Stock |
| Detail page | View 370-3863-01 › |
Drop-in replacements for 370-3863-01
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.
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
9P5004-301 - Seagate U8 17.2GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache 3.5-inch Hard Drive
SKU: 9P5004-301
Price: $85.38
9M9002-301 - Seagate U4 Series 4.3GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M9002-301
Price: $121.86
9R5004-001 - Seagate U10 Series 20GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9R5004-001
Price: $147.37
9M9004-301 - Seagate U4 Series 8.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M9004-301
Price: $151.55
9M90020012 - Seagate U4 Series 4.3GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M90020012
Price: $182.50
9M90033011 - Seagate 6.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M90033011
Price: $182.50
9P5002-B01 - Seagate U8 Series 8.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9P5002-B01
Price: $192.08
9M9003-001 - Seagate 6.4GB 5400RPM IDE Ultra ATA/66 (ATA-5) 256KB Cache (CE) 3.5-inch Hard Drive
SKU: 9M9003-001
Price: $214.67
9P5001-300 - Seagate U8 Series 4.3GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9P5001-300
Price: $243.67
9P5001-020 - Seagate U8 Series 4.3GB 5400RPM IDE Ultra ATA/66 (ATA-5) 512KB Cache (CE) 3.5-inch Hard Drive
SKU: 9P5001-020
Price: $243.67
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.