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Silver 3.5-inch hard drive with SAS connector and model label

Western Digital

Western Digital 0B47747 18 TB 3.5" 7200 RPM SAS internal hard drive

SKU CH-DMRG-SGKFY MPN 0B47747

An 18 TB, 7200 RPM SAS hard drive with energy-assisted magnetic recording for 24/7 data-centre workloads

  • Capacity18TB
  • RPM7200 RPM
  • 18 TB capacity for massive data storage
  • 7200 RPM spindle speed for responsive performance
  • SAS interface for enterprise connectivity
  • Energy-assisted magnetic recording boosts areal density
  • 512e sector format ensures broad compatibility

Capacity and interface

The Western Digital 0B47747 is an 18 TB 3.5 inch internal hard drive with a SAS interface. It uses energy-assisted magnetic recording and a 512e format to deliver high capacity for data centre and server workloads. The drive spins at 7200 RPM and is built for continuous 24 7 operation in multi-user environments.

Thermals noise and power

Designed for 24 7 data centre duty the drive manages heat and vibration in dense multi-drive chassis. Its energy-assisted recording method helps maintain performance while keeping power draw in line with enterprise requirements. Acoustic output is controlled for rack environments where many units operate simultaneously.

Build quality and connectivity

The 3.5 inch form factor fits standard enterprise drive bays and the SAS connector supports dual-port connectivity for redundant paths. Proven hardware from the Ultrastar HC555 lineage simplifies qualification and integration into existing storage infrastructure. The 512e format eases deployment with legacy and modern operating systems alike.

Přednosti

  • 18 TB capacity for massive data storage
  • 7200 RPM spindle speed for responsive performance
  • SAS interface for enterprise connectivity
  • Energy-assisted magnetic recording boosts areal density
  • 512e sector format ensures broad compatibility

Specifikace

BrandWestern Digital
Model0B47747
Part Number0B47747
Capacity18TB
RPM7200 RPM
Přepravní hmotnost0.91 kg
Rozměry balení76 × 51 × 25 mm

Otázky k tomuto produktu

How do I install this 3.5" SAS drive into a server backplane and what step is often missed?

Mount the drive in a 3.5" bay, connect the SAS data and power cables, then ensure the RAID or HBA controller is configured for 512e sector format before initialising the volume.

What maintenance or replacement will the Ultrastar HC555 18 TB drive need over its service life?

No scheduled maintenance is required; replace the drive only if SMART attributes report reallocated sectors or the SAS controller logs unrecoverable read errors.

What limit appears first when the 7200 RPM drive runs sustained 24×7 workloads?

The 7200 RPM spindle speed caps sustained sequential throughput, so the mechanical transfer rate becomes the bottleneck before the SAS interface saturates.

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