Replacement for ST9145A: Drop-In Alternatives We Stock
Looking for a replacement for the ST9145A (ST9145A - Seagate 120MB 2.5-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 ST9145A
| SKU | ST9145A |
|---|---|
| Product | ST9145A - Seagate 120MB 2.5-inch Hard Drive |
| Current price | $331.58 |
| Stock status | In Stock |
| Detail page | View ST9145A › |
Drop-in replacements for ST9145A
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.
ST9500325ASG - Seagate Seagate Momentus 5400.6 500GB 5400RPM SATA 3Gb/s 8MB Cache 2.5-inch Hot Swappable Hard Drive
SKU: ST9500325ASG
Price: $143.39
9W2083-307 - Seagate Seagate Barracuda 7200.7 Plus 120GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 3.5-inch Hard Drive
SKU: 9W2083-307
Price: $153.67
ST3300650SS - Seagate Seagate Constellation ES.2 3TB 7200RPM SAS 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: ST3300650SS
Price: $165.79
Seagate STJJ5000400 Seagate LaCie 5TB Rugged Mini USB 3.0 External Hard Drive
SKU: STJJ5000400
Price: $347.37
Seagate ST12000NM001J ST12000NM001J - Seagate Exos X18 12 TB SATA 6Gb/s Hard Drive
SKU: ST12000NM001J
Price: $721.05
9SU246-250 - Seagate 500GB 7200RPM SAS 6Gb/s Self Encrypting Drive SED SFF 2.5-inch Hard Drive
SKU: 9SU246-250
Price: $357.09
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.