Replacement for 431944-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 431944-B21 (431944-B21 - HP 300GB Hot Swap Single Port Hard Drive)? Pro Disk Network ships HP 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 431944-B21
| SKU | 431944-B21 |
|---|---|
| Product | 431944-B21 - HP 300GB Hot Swap Single Port Hard Drive |
| Current price | $138.95 |
| Stock status | In Stock |
| Detail page | View 431944-B21 › |
Drop-in replacements for 431944-B21
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.
431944-B22 - HP 300GB 15000RPM SAS 3GB/s Hot-Pluggable Dual Port 3.5-inch Hard Drive
SKU: 431944-B22
Price: $250.53
EM174AA - HP 300GB 15000RPM SAS 3GB/s Hot Swap Single Port 3.5-inch Hard Drive
SKU: EM174AA
Price: $155.79
AM244A - HP 300GB 10000RPM SAS 6GB/s Hot Swap Dual Port 2.5-inch Hard Drive
SKU: AM244A
Price: $145.26
A2Z20AA - HP 300GB 10000RPM SAS 3GB/s Hot Swap Dual Port 2.5-inch Hard Drive
SKU: A2Z20AA
Price: $195.79
LU967AT - HP 300GB 15000RPM SAS 6.0Gb/s Hot Swap Dual Port 3.5-inch Hard Drive
SKU: LU967AT
Price: $205.26
705020-001 - HP 300GB 10000RPM SAS 6.0Gb/s Hot Swap Dual Port 2.5-inch Hard Drive
SKU: 705020-001
Price: $226.08
432320-001 - HP 146.8GB 10000RPM 2.5-inch Hot Swap Serial Attached SCSI (sas) Single-Port Hard Drive with Tray
SKU: 432320-001
Price: $54.74
BD3008A4B6 - HP 300GB 10000RPM 80-Pin Ultra-320 SCSI Universal Hot Swap Hard Drive with Tray
SKU: BD3008A4B6
Price: $369.84
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.