Replacement for ST42101ND: Drop-In Alternatives We Stock
Looking for a replacement for the ST42101ND (ST42101ND - Seagate 1.9GB 3600RPM Fast SCSI 5.25-inch 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 ST42101ND
| SKU | ST42101ND |
|---|---|
| Product | ST42101ND - Seagate 1.9GB 3600RPM Fast SCSI 5.25-inch Hard Drive |
| Stock status | In Stock |
| Detail page | View ST42101ND › |
Drop-in replacements for ST42101ND
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.
ST42100N - Seagate Wren-9 1.9GB 3600RPM Fast SCSI 256KB Cache 5.25-inch Hard Drive
SKU: ST42100N
Price: $187.37
939001-002 - Seagate 1.2GB 3600RPM Fast SCSI 256KB Cache 50-Pin 5.25-inch Hard Drive
SKU: 939001-002
Price: $221.74
ST41650N - Seagate 1.6GB 3600RPM Fast SCSI 256KB Cache 50-Pin 5.25-inch Hard Drive
SKU: ST41650N
Price: $369.84
ST41200N - Seagate 1.2GB 3600RPM Fast SCSI 256KB Cache 50-Pin 5.25-inch Hard Drive
SKU: ST41200N
Price: $395.34
ST4376N - Seagate 330MB 3600RPM SCSI 50-Pin 32KB Cache 5.25-inch Hard Drive
SKU: ST4376N
Price: $496.84
ST4766N - Seagate Wren-6 676MB 3600RPM SCSI 50-Pin 32KB Cache 5.25-inch Hard Drive
SKU: ST4766N
Price: $503.09
938002-002 - Seagate Wren-6 766MB 3600RPM SCSI 50-Pin 32KB Cache 5.25-inch Hard Drive
SKU: 938002-002
Price: $560.25
ST730212DE - Seagate Lyrion 30GB ATA-66 3600RPM 2MB Cache 1.8 Hard Drive
SKU: ST730212DE
Price: $113.68
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.