Replacement for STM340211A: Drop-In Alternatives We Stock
Looking for a replacement for the STM340211A (STM340211A - Seagate DiamondMax 20 40GB 3.5-inch Hard Drive ATA-100 7200RPM 2MB Cache)? 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 STM340211A
| SKU | STM340211A |
|---|---|
| Product | STM340211A - Seagate DiamondMax 20 40GB 3.5-inch Hard Drive ATA-100 7200RPM 2MB Cache |
| Current price | $479.58 |
| Stock status | In Stock |
| Detail page | View STM340211A › |
Drop-in replacements for STM340211A
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.
STM3402111A - Seagate DiamondMax 20 40GB 3.5-inch Hard Drive ATA-100 7200RPM 2MB Cache
SKU: STM3402111A
Price: $259.50
ST0154000U - Seagate DiamondMax 40GB ATA-66 7200RPM 2MB Cache 3.5-inch Hard Drive
SKU: ST0154000U
Price: $874.18
9DN011-326 - Seagate DiamondMax 20 80GB 7200RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: 9DN011-326
Price: $150.20
STM3802110A - Seagate DiamondMax 20 80GB 3.5-inch Hard Drive ATA-100 7200RPM 2MB Cache
SKU: STM3802110A
Price: $157.07
9DN03C-326 - Seagate Maxtor DiamondMax 120GB 7200RPM ATA-100 8MB Cache 3.5-inch Hard Drive
SKU: 9DN03C-326
Price: $164.04
9DP03F-326 - Seagate Maxtor DiamondMax 21 200GB 7200RPM ATA-100 8MB Cache 3.5-inch Hard Drive
SKU: 9DP03F-326
Price: $336.29
9DP046-305 - Seagate DiamondMax 21 500GB 7200RPM ATA-100 16MB Cache 3.5-inch Hard Drive
SKU: 9DP046-305
Price: $343.63
9DP046-326 - Seagate Maxtor DiamondMax 21 500GB 7200RPM ATA-100 16MB Cache 3.5-inch Hard Drive
SKU: 9DP046-326
Price: $437.78
STM3250820A - Seagate DiamondMax 21 250GB 3.5-inch Hard Drive ATA-100 7200RPM 16MB Cache
SKU: STM3250820A
Price: $474.61
STM3160212A - Seagate DiamondMax 20 160GB 3.5-inch Hard Drive ATA-100 7200RPM 8MB Cache
SKU: STM3160212A
Price: $532.82
STM3160215A - Seagate DiamondMax 21 160GB 7200RPM ATA-100 2MB Cache 3.5-inch Hard Drive
SKU: STM3160215A
Price: $534.93
STM3160812A - Seagate DiamondMax 20 160GB 3.5-inch Hard Drive ATA-100 7200RPM 8MB Cache
SKU: STM3160812A
Price: $571.68
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.