Replacement for ST31055N: Drop-In Alternatives We Stock
Looking for a replacement for the ST31055N (ST31055N - Seagate 1GB 5400RPM Ultra SCSI 50-Pin 3.5-inch 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 ST31055N
| SKU | ST31055N |
|---|---|
| Product | ST31055N - Seagate 1GB 5400RPM Ultra SCSI 50-Pin 3.5-inch Hard Drive |
| Current price | $461.84 |
| Stock status | In Stock |
| Detail page | View ST31055N › |
Drop-in replacements for ST31055N
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.
947001-051 - Seagate 1GB 5400RPM Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 947001-051
Price: $172.62
947001-028 - Seagate 1GB 5400RPM Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 947001-028
Price: $344.33
9C4003-026 - Seagate Hawk 2.1GB 5400RPM Wide Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 9C4003-026
Price: $448.99
9C4003-055 - Seagate Hawk 2.1GB 5400RPM Wide Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 9C4003-055
Price: $493.49
9C4003-044 - Seagate Hawk 2.1GB 5400RPM Wide Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 9C4003-044
Price: $560.25
9C4003-027 - Seagate Hawk 2.1GB 5400RPM Wide Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 9C4003-027
Price: $642.43
9C4003-041 - Seagate Hawk 2.1GB 5400RPM Wide Ultra SCSI 50-Pin 256KB Cache 3.5-inch Hard Drive
SKU: 9C4003-041
Price: $712.64
9B1003-041 - Seagate Hawk 2LP 1.06GB 5400RPM Ultra SCSI 50-Pin 256KB Cache 3.5-inch Low Profile Hard Drive
SKU: 9B1003-041
Price: $99.01
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.