Replacement for ST9120822A: Drop-In Alternatives We Stock
Looking for a replacement for the ST9120822A (ST9120822A - Seagate Momentus 120GB 5400RPM EIDE Laptop 8MB Cache DMA/ATA-100 UL 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 ST9120822A
| SKU | ST9120822A |
|---|---|
| Product | ST9120822A - Seagate Momentus 120GB 5400RPM EIDE Laptop 8MB Cache DMA/ATA-100 UL Hard Drive |
| Current price | $250.53 |
| Stock status | In Stock |
| Detail page | View ST9120822A › |
Drop-in replacements for ST9120822A
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.
ST960822A - Seagate Momentus 60GB 5400RPM EIDE Laptop 8MB Cache ATA-100 ultra 2.5-inch Ultra- Slim Line 9 Hard Drive
SKU: ST960822A
Price: $395.34
ST96023A - Seagate Momentus 60GB 7200RPM EIDE Laptop 8MB Cache DMA/ATA-100 Hard Drive
SKU: ST96023A
Price: $165.79
ST9120821AS - Seagate Momentus 120GB 5400RPM SATA Laptop 8MB Cache 2.5-inch Ultra- Slim Line Hard Drive
SKU: ST9120821AS
Price: $113.68
ST3120025A - Seagate 120GB 7200RPM EIDE/ATA-100 3.5-inch LOW PROFLE 2MB Cache Hard Drive
SKU: ST3120025A
Price: $205.26
ST3120022A - Seagate BarraCuda 120GB 7200RPM EIDE 2MB Cache 3.5-inch Hard Drive
SKU: ST3120022A
Price: $392.99
9W3184-023 - Seagate Momentus 5400.2 120GB 5400RPM SATA 1.5Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: 9W3184-023
Price: $113.68
ST9120822AS - Seagate Momentus 120GB 5400RPM SATA 1.5Gb/s 8MB Cache 2.5-inch Hard Drive
SKU: ST9120822AS
Price: $128.95
9W3884-020 - Seagate Momentus 5400.2 120GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 2.5-inch Hard Drive
SKU: 9W3884-020
Price: $147.36
9W3884-300 - Seagate Momentus 5400.2 120GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 2.5-inch Hard Drive
SKU: 9W3884-300
Price: $192.08
9W3884-501 - Seagate Momentus 5400.2 120GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 2.5-inch Hard Drive
SKU: 9W3884-501
Price: $192.08
9W3884-030 - Seagate Momentus 5400.2 120GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache (CE) 2.5-inch Hard Drive
SKU: 9W3884-030
Price: $192.08
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.