Dell Seagate Cheetah NS ST3400755SS 400GB 3.5" SAS Enterprise Server HDD Drive
Refurbished | Free Shipping | Allstate-Serviced Warranty | Money Back Guarantee
Fully Tested | SAS | 3.5-Inch | 400GB | Enterprise HDD | Dell / Seagate Model: ST3400755SS | Cheetah NS
Designed for supported Dell servers, storage systems, and other enterprise platforms that accept 3.5" SAS hard drives
Avoid compatibility mistakes and downtime. This exact Dell / Seagate Cheetah NS 3.5" SAS enterprise hard drive is sold as Refurbished, professionally tested, and identified by the correct model ST3400755SS—so you can validate fitment before deployment and order with confidence.
Built for business and datacenter environments, this 400GB SAS hard drive is a practical choice for server replacements, RAID arrays, hot spares, and inventory stocking where matching interface, form factor, and model number matters.
Testing / Functional Status (Fully Tested)
This drive is fully tested and verified for proper operation prior to shipment. Our goal is simple: deliver a reliable enterprise hard drive that’s ready for installation and backed by the protections associated with the Refurbished program.
Typical validation includes:
Power-on / initialization verification
Health check and functional read/write verification
Interface detection and stability confirmation
Capacity recognition check
General operational testing for enterprise deployment readiness
Interface, Compatibility & Downtime Risk (Read This)
Interface: SAS (Serial Attached SCSI)
Form Factor: 3.5-inch enterprise drive
Capacity: 400GB
Important: This is a SAS drive, not SATA. A SATA-only backplane or controller will not accept a SAS drive.
For server and storage installs, confirm controller/backplane compatibility, firmware expectations, tray/caddy requirements, and RAID environment support before ordering.
Matching the exact Seagate model ST3400755SS helps reduce ordering errors and downtime risk, especially in production environments where interface and drive type must match existing hardware.
If you’re replacing an existing drive, confirming the model, interface, and form factor is one of the best ways to avoid fitment issues and speed up Dell / Seagate
Series: Cheetah NS
Model: ST3400755SS
Capacity: 400GB
Form Factor: 3.5"
Interface: SAS
Drive Type: Enterprise Hard Disk Drive (HDD)
Use Case: Servers, RAID arrays, hot spares, enterprise storage with systems that support 3.5" SAS hard drives, including many Dell server and enterprise storage platforms using SAS controllers and backplanes. Please verify:
SAS controller/backplane requirements for your chassis
Any firmware, RAID, or storage compatibility requirements for your environment
Physical 3.5" bay compatibility in your system
Why Buy Refurbished
This item is offered through the Refurbished program from a quality-vetted seller. states that Refurbished products include free shipping, 30-day free returns, and an Allstate-serviced warranty, with Money Back Guarantee also applying. That gives you two layers of protection: warranty coverage and transaction protection.
Warranty Note (Important)
If your listing is in the Certified Refurbished tier, states the included Allstate-serviced warranty is two years.
If it is listed under Excellent / Very Good / Good, states the included warranty is one year.
Use the warranty length that matches your specific refurb tier.
What’s Included
Dell Seagate Cheetah NS ST3400755SS 400GB 3.5" SAS Enterprise Hard Drive
Only the item shown in the photos is included unless otherwise stated. For server parts, please review photos to confirm whether any tray, caddy, bracket, or carrier is included.
Buy with confidence from an Refurbished seller offering free shipping, tested enterprise hardware, and verified Seagate model identification—a dependable replacement option for supported 3.5" SAS server and storage environments.
