Replacement for ST506: Drop-In Alternatives We Stock
Looking for a replacement for the ST506 (ST506 Seagate 5MB 3600RPM 5.25-inch Internal Hard Drive)? Pro Disk Network ships Seagate 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 ST506
| SKU | ST506 |
|---|---|
| Product | ST506 Seagate 5MB 3600RPM 5.25-inch Internal Hard Drive |
| Stock status | In Stock |
| Detail page | View ST506 › |
Drop-in replacements for ST506
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.
ST730212DE - Seagate Lyrion 30GB ATA-66 3600RPM 2MB Cache 1.8 Hard Drive
SKU: ST730212DE
Price: $113.68
ST64022FX - Seagate ST1 4GB IDE Ultra ATA/33 (ATA-4) 3600RPM 2MB Cache Hard Drive
SKU: ST64022FX
Price: $157.72
9AX762-502 - Seagate ST1.3 Series 12GB 3600RPM IDE Ultra ATA/66 (ATA-5) ZIF 2MB Cache 1-inch Hard Drive
SKU: 9AX762-502
Price: $157.88
9AX762-990 - Seagate ST1.3 Series 12GB 3600RPM IDE Ultra ATA/66 (ATA-5) ZIF 2MB Cache 1-inch Hard Drive
SKU: 9AX762-990
Price: $157.88
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.