Replacement for 21F8633: Drop-In Alternatives We Stock
Looking for a replacement for the 21F8633 (21F8633 - IBM Tandberg Data TDC 3640 QIC 120MB Tape Drive Unit AS400 9404)? Pro Disk Network ships IBM 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 21F8633
| SKU | 21F8633 |
|---|---|
| Product | 21F8633 - IBM Tandberg Data TDC 3640 QIC 120MB Tape Drive Unit AS400 9404 |
| Current price | $198.36 |
| Stock status | In Stock |
| Detail page | View 21F8633 › |
Drop-in replacements for 21F8633
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.
45E0668 - IBM 30 / 60GB SLR60 QIC SCSI Low Voltage Differential (LVD) Tape Drive
SKU: 45E0668
Price: $163.74
45E2469 - IBM Tandberg 800/1600GB Ultrium LTO-4 HH Low Voltage Differential Loader Tape Library for T24
SKU: 45E2469
Price: $871.63
7947-3640 - IBM 2.40GHz 5.86GT/s QPI 8MB L3 Cache Intel Xeon E5530 Quad Core Processor
SKU: 7947-3640
Price: $152.95
7946-3640 - IBM 2.40GHz 5.86GT/s QPI 8MB L3 Cache Intel Xeon E5530 Quad Core Processor
SKU: 7946-3640
Price: $152.95
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.