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Silver 2.5 inch enterprise hard drive bare drive

HGST

HGST 0B27975 900GB 10520 RPM 128MB SAS 12Gb/s 2.5" laptop hard drive

SKU CH-B1B6-N01BX MPN 0B27975

A 900GB 2.5-inch enterprise hard drive spinning at 10520 RPM with 128MB cache and SAS 12Gb/s interface

  • PackagingBare Drive
  • InterfaceSAS 12Gb/s
  • Capacity900GB
  • Cache128MB
  • Average Seek Time3.3-3.7 ms
  • Average Write Time3.8-4.4 ms

Capacity 900GB

Struck-through versions exist but are not stocked here.

Options SAS ULTRA 512E ISE

  • Enterprise-grade 10520 RPM spindle speed accelerates data access
  • 128MB cache buffer optimises read and write throughput
  • SAS 12Gb/s interface moves large workloads quickly
  • 900GB capacity fits demanding enterprise storage arrays
  • 5-inch 15mm form factor suits dense server bays

Enterprise 900 GB SAS drive

The HGST Ultrastar C10K1800 is a 2.5-inch enterprise hard drive built for servers and storage arrays that need fast, reliable access to large datasets. It spins at 10520 RPM with a 128 MB cache and connects through a 12Gb/s SAS interface.

Upgrade from prior 10K SFF drives

This model delivers 2.5X faster random write performance and 23% faster sequential performance over the previous generation of 2.5-inch 10K RPM drives. The jump is worth it when workloads demand lower latency and higher throughput for mission-critical applications.

Suits high-density enterprise storage

It fits 15 mm drive bays in compatible servers and arrays where 900 GB capacity and 2M hours MTBF are required. Builders needing a different capacity, a 512n sector format, or a non-SAS interface should look at other models.

Highlights

  • Enterprise-grade 10520 RPM spindle speed accelerates data access
  • 128MB cache buffer optimises read and write throughput
  • SAS 12Gb/s interface moves large workloads quickly
  • 900GB capacity fits demanding enterprise storage arrays
  • 5-inch 15mm form factor suits dense server bays

Specifications

BrandHGST
SeriesUltrastar C10K1800
ModelHUC101890CS4200 (0B27975)
PackagingBare Drive
InterfaceSAS 12Gb/s
Capacity900GB
Cache128MB
Average Seek Time3.3-3.7 ms
Average Write Time3.8-4.4 ms
Average Latency2.85 ms
RPM10520 RPM
FeaturesIndustry-leading 1.8TB capacity in a 10K RPM HDD, 50% more than previous generations
Best-in-class performance
- 2.5X faster random write
- 23% faster sequential
Advance format (4KN and 512e) and 512n models
12Gb/s SAS moves more data quickly & reliably
128MB cache buffer manages data efficiency
Advanced Power Management optimizes power consumption
Best-in-class power efficiency
2M hours MTBF rating
Security & encryption models including ISE, TCG-SED & FIPS 140-2 certified TCG-SED
UsageFor Enterprise Storage
Form Factor2.5"
Height (maximum)15mm
Width (maximum)70.10mm
Length (maximum)100.45mm
Shipping weight0.22 kg
Package size152 × 105 × 17 mm

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 15mm height fit my 2.5" SAS bay?

The drive measures 15mm high, 70.10mm wide and 100.45mm long, matching the standard 2.5-inch SFF form factor used in enterprise servers and storage arrays.

What is the correct SAS cabling step that is often missed?

Connect the 12Gb/s SAS data and power cables to the backplane or HBA, then verify the controller detects the 900GB LUN before initializing the volume.

When should I plan to replace this enterprise drive?

The 2M-hour MTBF rating and non-volatile media cache are designed for continuous operation; monitor SMART reallocated-sector counts and replace if they rise sharply.

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