Replacement for 0A37991: Drop-In Alternatives We Stock
Looking for a replacement for the 0A37991 (0A37991 - Hitachi Deskstar 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive)? Pro Disk Network ships Hitachi 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 0A37991
| SKU | 0A37991 |
|---|---|
| Product | 0A37991 - Hitachi Deskstar 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive |
| Current price | $182.37 |
| Stock status | In Stock |
| Detail page | View 0A37991 › |
Drop-in replacements for 0A37991
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.
0A38720 - Hitachi Deskstar 7K1000.B 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 0A38720
Price: $102.57
HDT721064SLA360 - Hitachi Deskstar 7K1000.B 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: HDT721064SLA360
Price: $133.04
0A39990 - Hitachi Deskstar 7K1000.B 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 0A39990
Price: $189.47
0A38728 - Hitachi Deskstar 7K1000.B 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 0A38728
Price: $234.70
0A38014 - Hitachi Deskstar 7K1000.B 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: 0A38014
Price: $442.11
HDE721064SLA330 - Hitachi Deskstar E7K1000 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: HDE721064SLA330
Price: $113.09
HDS721064CLA332 - Hitachi Deskstar 7K1000.C 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: HDS721064CLA332
Price: $173.78
0A39991 - Hitachi Deskstar E7K1000 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 0A39991
Price: $182.37
0F10760 - Hitachi Deskstar 7K1000.C 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 0F10760
Price: $226.08
0F11017 - Hitachi Deskstar 7K1000.C 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: 0F11017
Price: $226.08
HDT721064SLA380 - Hitachi Deskstar 7k1000.B 640GB 7200RPM SATA 3Gb/s 8MB Cache 3.5-inch Hard Drive
SKU: HDT721064SLA380
Price: $401.82
HDS721064CLA632 - Hitachi Deskstar 7K1000.C 640GB 7200RPM SATA 6Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: HDS721064CLA632
Price: $372.12
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.