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A bare 3.5 inch enterprise hard drive with silver metal casing and exposed circuit board

Seagate

Seagate Constellation ES ST500NM0021 500GB 7200 RPM 64MB SAS 6Gb/s 3.5" internal hard drive

SKU CH-Z7SS-16M9M MPN ST500NM0021

A 500 GB 3.5 inch SAS drive spinning at 7200 RPM with 64 MB cache and 256-bit encryption for 24×7 enterprise workloads

  • PackagingBare Drive
  • InterfaceSAS 6Gb/s
  • Capacity500GB
  • RPM7200 RPM
  • Cache64MB
  • FeaturesEncryption
  • Enterprise nearline drive built for 24×7 operation
  • 6 Gb/s SAS interface delivers high-throughput connectivity
  • 7200 RPM spindle speed supports fast sequential access
  • 64 MB cache buffers bursts for smoother I/O
  • Self-encrypting 256-bit option protects data at rest

Enterprise nearline drive

This Seagate Constellation ES model is a 500GB SAS hard drive built for 24×7 operation in enterprise storage arrays. It spins at 7200 RPM with a 64MB cache and includes self-encrypting drive technology. The 3.5-inch form factor fits standard server bays and it ships as a bare drive without accessories.

Suited for array rebuilds and cold tiers

The drive serves administrators who need a replacement SAS disk for existing nearline enclosures or a cost-effective tier for infrequently accessed data. Buyers who require larger capacities or faster interfaces for active workloads should evaluate other options. The bare-drive packaging also means no cables or mounting hardware are included in the box.

SAS 6Gb/s interface

The single specification that determines compatibility is the 6Gb/s SAS interface. Your backplane, HBA or RAID controller must support this exact protocol and speed for the drive to function. A system equipped only with different interfaces will not recognise the device.

Points forts

  • Enterprise nearline drive built for 24×7 operation
  • 6 Gb/s SAS interface delivers high-throughput connectivity
  • 7200 RPM spindle speed supports fast sequential access
  • 64 MB cache buffers bursts for smoother I/O
  • Self-encrypting 256-bit option protects data at rest

Caractéristiques

BrandSeagate
SeriesConstellation ES
ModelST500NM0021
PackagingBare Drive
InterfaceSAS 6Gb/s
Capacity500GB
RPM7200 RPM
Cache64MB
FeaturesEncryption
Form Factor3.5"
Poids d’expédition0.93 kg
Dimensions du colis178 × 127 × 51 mm

Questions sur cet article

How often should the 64MB cache drive be replaced in a 24×7 server?

The Constellation ES series is designed for continuous 24×7 operation with a 5-year limited warranty; replacement timing depends on workload and SMART monitoring.

What throughput limit appears first when the SAS 6Gb/s interface runs sustained writes?

The 7200 RPM mechanical speed and 64MB cache determine the sustained write ceiling before the 6Gb/s SAS link saturates.

How much heat and noise does the 3.5" 7200 RPM drive produce during all-day operation?

Enterprise nearline 7200 RPM drives run warmer and louder than desktop models; ensure adequate chassis airflow for 24×7 use.

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