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Silver 3.5 inch SAS hard drive with Dell Compellent label

DELL

DELL COMPELLENT ST4000NM0023 4TB 7.2K SAS 3.5" internal hard drive

SKU CH-DQC9-K4R04

A 4TB 3.5-inch SAS drive spinning at 7200 RPM with a 128MB cache for nearline storage arrays

  • 4 TB capacity stores large datasets and media libraries
  • 7200 RPM spindle speed delivers responsive data access for demanding workloads
  • 128 MB cache buffers bursts to smooth read and write performance
  • SAS 6 Gb/s interface provides reliable connectivity for enterprise storage arrays
  • 5 inch form factor fits standard drive bays in servers and workstations

4 TB SAS drive for nearline storage

The Dell Compellent ST4000NM0023 is a 4 TB 3.5 inch internal hard drive built for nearline SAS environments. It spins at 7200 RPM and provides a 128 MB cache to smooth sustained workloads. The drive is supplied new and targets arrays that need high capacity with enterprise SAS connectivity.

SAS 6 Gb/s interface practical limits

The 6 Gb/s SAS link caps maximum throughput at the interface level, so sequential transfers cannot exceed that bandwidth. Random I/O performance will depend on the controller and queue depth rather than the drive alone. Systems limited to 3 Gb/s backplanes will operate at the lower speed. Workloads demanding higher sustained throughput need a faster interface generation.

128 MB cache and 3.5 inch SAS connector implications

The 128 MB buffer helps absorb write bursts and reduces rotational latency during mixed read-write patterns. Standard 3.5 inch SAS power and data connectors fit common hot-swap trays and backplanes without adapters. At 2.0 pound the drive seats securely in enterprise chassis. The 90 day warranty period reflects the supplier's coverage for this unit.

Points forts

  • 4 TB capacity stores large datasets and media libraries
  • 7200 RPM spindle speed delivers responsive data access for demanding workloads
  • 128 MB cache buffers bursts to smooth read and write performance
  • SAS 6 Gb/s interface provides reliable connectivity for enterprise storage arrays
  • 5 inch form factor fits standard drive bays in servers and workstations

Caractéristiques

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Questions sur cet article

Should I choose the 4TB capacity for bulk storage or a smaller drive for the operating system?

The 4TB capacity is designed for nearline bulk storage; a smaller, faster drive is better suited for the operating system.

What does the 7200RPM speed deliver in a real server?

7200RPM provides consistent sequential throughput for high-capacity nearline workloads such as backups and archives.

How does the SAS 6Gb/s interface limit actual transfer rates?

The SAS 6Gb/s link caps the maximum interface bandwidth at 6 gigabits per second, which bounds real-world sustained transfers.

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