Replacement for 3840AT: Drop-In Alternatives We Stock
Looking for a replacement for the 3840AT (3840AT - Quantum 3.8GB 5400RPM IDE / ATA 3.5-inch Hard Drive)? Pro Disk Network ships 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 3840AT
| SKU | 3840AT |
|---|---|
| Product | 3840AT - Quantum 3.8GB 5400RPM IDE / ATA 3.5-inch Hard Drive |
| Current price | $369.84 |
| Stock status | In Stock |
| Detail page | View 3840AT › |
Drop-in replacements for 3840AT
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.
QML10200LBA - Quantum 10 GB 3.5 Internal Hard Drive - IDE Ultra ATA/66 (ATA-5) - 5400 rpm - 512 KB Buffer
SKU: QML10200LBA
Price: $286.99
QML40000LDA - Quantum 40 GB 3.5 Internal Hard Drive - IDE Ultra ATA/100 (ATA-6) - 4500 rpm - 128 KB Buffer
SKU: QML40000LDA
Price: $392.99
ST16A2F1 - Quantum Fireball ST 1.6GB 5400RPM IDE / ATA-33 128KB Cache 3.5-inch Hard Drive
SKU: ST16A2F1
Price: $195.99
LB10A492 - Quantum Fireball LCT10 10.2GB 5400RPM IDE / ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: LB10A492
Price: $246.53
LB10A011 - Quantum Fireball LCT10 10.2GB 5400RPM IDE / ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: LB10A011
Price: $259.50
FB12A34401C - IBM / Quantum Fireball 1.2GB 5400RPM ATA / IDE 128KB Cache 3.5-inch Hard Drive
SKU: FB12A34401C
Price: $268.38
CX64A461 - Quantum Fireball CX 6.4GB 5400RPM IDE / ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: CX64A461
Price: $276.80
CR64A101 - Quantum Fireball CR 6.4GB 5400RPM IDE / ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: CR64A101
Price: $291.79
CX20A011 - Quantum Fireball CX 20.4GB 5400RPM IDE / ATA-66 512KB Cache 3.5-inch Hard Drive
SKU: CX20A011
Price: $291.79
ST32A02H - Quantum Fireball ST 3.2GB 5400RPM IDE / ATA-33 128KB Cache 3.5-inch Hard Drive
SKU: ST32A02H
Price: $294.96
QML10000LD-A - Quantum 20GB 5400RPM IDE/ATA-100 3.5-inch Desktop Hard Drive Dimension XPS Gen 1
SKU: QML10000LD-A
Price: $392.99
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.