Replacement for HTS721040G9AT00: Drop-In Alternatives We Stock
Looking for a replacement for the HTS721040G9AT00 (HTS721040G9AT00 - Hitachi Travelstar 7K100 40GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-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 HTS721040G9AT00
| SKU | HTS721040G9AT00 |
|---|---|
| Product | HTS721040G9AT00 - Hitachi Travelstar 7K100 40GB 7200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive |
| Current price | $239.55 |
| Stock status | In Stock |
| Detail page | View HTS721040G9AT00 › |
Drop-in replacements for HTS721040G9AT00
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.
DK13GA-40AV - Hitachi Travelstar C4K40 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 1.8-inch Hard Drive
SKU: DK13GA-40AV
Price: $137.29
HTC426040F9AT00 - Hitachi Travelstar C4K60 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 1.8-inch Hard Drive
SKU: HTC426040F9AT00
Price: $137.29
IC5N040ATCS050 - Hitachi Travelstar 40GNX 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: IC5N040ATCS050
Price: $151.82
08K0633 - Hitachi Travelstar 80GN 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: 08K0633
Price: $157.07
HTS424040M9AT00 - Hitachi TravelStar 4K40 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 44-Pin 2.5-inch Hard Drive
SKU: HTS424040M9AT00
Price: $165.79
HTS5408040M9AT0 - Hitachi Travelstar 5K80 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: HTS5408040M9AT0
Price: $174.75
HTS421240H9AT00 - Hitachi Travelstar 4K120 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 2.5-inch Hard Drive
SKU: HTS421240H9AT00
Price: $190.79
IC25N040ATCX05 - Hitachi Travelstar 40GNX 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: IC25N040ATCX05
Price: $191.22
IC25N040ATC505 - Hitachi Travelstar 40GNX 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: IC25N040ATC505
Price: $191.24
HTS545040G9AT00 - Hitachi Travelstar 5K100 40GB 5400RPM IDE Ultra ATA/100 (ATA-6) 8MB Cache 2.5-inch Hard Drive
SKU: HTS545040G9AT00
Price: $196.17
DK23FA-40 - Hitachi Travelstar 40GB 4200RPM IDE Ultra ATA/100 (ATA-6) 2MB Cache 2.5-inch Hard Drive
SKU: DK23FA-40
Price: $211.76
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.