Replacement for HDT021: Drop-In Alternatives We Stock
Looking for a replacement for the HDT021 (HDT021 - Cisco HDT021 1 TB 2.5 Internal Hard Drive)? Pro Disk Network ships Cisco 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 HDT021
| SKU | HDT021 |
|---|---|
| Product | HDT021 - Cisco HDT021 1 TB 2.5 Internal Hard Drive |
| Current price | $1,487.97 |
| Stock status | In Stock |
| Detail page | View HDT021 › |
Drop-in replacements for HDT021
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.
HDD-7835-H2-72 - Cisco 72GB 10000RPM SAS 6Gbps 3.5-inch Internal Hard Drive for MCS-7835-H2 Server
SKU: HDD-7835-H2-72
Price: $111.72
A03-D146GA2 - Cisco 146 GB 2.5 Internal Hard Drive - 6Gb/s SAS - 10000 rpm - Hot Swappable
SKU: A03-D146GA2
Price: $143.39
A03-D146GC2 - Cisco 146GB 15000RPM SAS 6GB/s 16MB Cache 2.5-inch Internal Hard Disk Drive
SKU: A03-D146GC2
Price: $157.07
A03-D1TBSATA - Cisco 1TB 7200RPM SATA 6Gbps Hot-Pluggable 64MB Cache 2.5-inch Internal Hard Drive
SKU: A03-D1TBSATA
Price: $157.07
Cisco NS2G10-146-HS 146 GB Internal Hard Drive - Fibre Channel - 10000 rpm - Hot Pluggable
SKU: NS2G10-146-HS
Price: $332.51
Cisco HDD-7816-I4-250 HDD-7816-I4-250= 250 GB 3.5 Internal Hard Drive - SATA/300 - 7200 rpm - Hot Swappable
SKU: HDD-7816-I4-250
Price: $371.63
Cisco HDD-78XX-I5-250 HDD-78XX-I5-250= 250 GB 3.5 Internal Hard Drive - SATA/300 - 7200 rpm
SKU: HDD-78XX-I5-250
Price: $371.63
Cisco NS2G15-73-HS 73 GB Internal Hard Drive - Fibre Channel - 15000 rpm - Hot Swappable
SKU: NS2G15-73-HS
Price: $397.51
Cisco HDD-7835-I2-146 146 GB 2.5 Internal Hard Drive - 3Gb/s SAS - 10000 rpm - Hot Swappable
SKU: HDD-7835-I2-146
Price: $432.36
R200-D146GB - Cisco 146 GB 3.5 Internal Hard Drive - 1 Pack - SAS - 15000 rpm - Hot Swappable
SKU: R200-D146GB
Price: $432.36
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.