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Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr

Product image: Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr-null
Product image: Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr-null
Product image: Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr-null
Product image: Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr-null
Product image: Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr-null
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Western digital ultrastar dc hc555 0b48722 16TB data center HDD 3.5" sata 6GB/s 7200rpm 512mb cmr

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Description

Item No. f478aacc-d928-4b2d-b0f5-176fa6d96d99
WD Ultrastar DC HC555 0B48722 — 16TB Data Center HDD 16TBSATA 6GB/s7200 RPMePMR CMR The Western Digital Ultrastar DC HC555 0B48722 is a 16TB data-center-class 3.5-inch SATA hard drive built for high-intensity 24/7 storage. Its helium-sealed ePMR CMR platform with OptiNAND spins at 7200 RPM with a 512 MB cache over SATA 6GB/s. Identified by part number 0B48722 (EAN 0829686009493), it is rated for 550TB/year workloads and a 2.5-million-hour MTBF. Typically in stock with fast delivery across

Attributes

Hdd General Characteristics

  • Disk Type: SATA
  • Storage Capacity: 16 TB
  • Form Factor: 3.5-inch

Details

WD Ultrastar DC HC555 0B48722 — 16TB Data Center HDD

16TBSATA 6GB/s7200 RPMePMR CMR

The Western Digital Ultrastar DC HC555 0B48722 is a 16TB data-center-class 3.5-inch SATA hard drive built for high-intensity 24/7 storage. Its helium-sealed ePMR CMR platform with OptiNAND spins at 7200 RPM with a 512 MB cache over SATA 6GB/s. Identified by part number 0B48722 (EAN 0829686009493), it is rated for 550TB/year workloads and a 2.5-million-hour MTBF. Typically in stock with fast delivery across Cyprus.

Compatibility & Setup
This is a bare internal 3.5-inch SATA drive — install it in a free 3.5-inch bay with a SATA data and power connection. It suits servers, RAID controllers and data-centre chassis that support 16TB SATA drives. No mounting screws, cables or backplane are included, and the drive ships unformatted for initialisation in your host system.

Best For

✓Enterprise and hyperscale data centres
✓Servers and RAID/JBOD arrays
✓24/7 high-intensity multi-user storage
✓Backup, archival and content repositories
✓File and object storage solutions
✓Dense multi-bay high-capacity chassis

Key Features

 
ePMR CMR recording
Energy-assisted perpendicular magnetic recording (ePMR) improves write consistency and areal density while keeping standard CMR compatibility — no SMR write penalty.
 
OptiNAND + ArmorCache
Embedded iNAND flash stores drive metadata for higher density and data protection, while ArmorCache safeguards the write cache during unexpected power loss.
 
Helium-sealed platform
A helium-sealed build lowers internal friction and power draw for reliable high-capacity operation in dense arrays.
 
Data-center reliability
Rated for 550TB/year workloads and a 2.5-million-hour MTBF, backed by a 5-year limited warranty for continuous 24/7 duty.

Technical Specifications

Identification
Brand Western Digital
Series Ultrastar DC HC555
Part Number 0B48722
EAN / GTIN 0829686009493
MPN 0B48722
Capacity & Format
Capacity 16TB
Form Factor 3.5-inch internal
Recording CMR via ePMR — energy-assisted perpendicular magnetic recording
Platform Helium-sealed
Sector Format 512e — 512-byte emulated
Interface & Performance
Interface SATA 6GB/s
Rotational Speed 7200 RPM
Cache 512 MB
Sustained Transfer Up to 269 MB/s
Enhancements OptiNAND, ArmorCache
Reliability
MTBF 2,500,000 hours
Rated Workload 550TB/year
Non-recoverable Errors 1 in 10^15 bits read
Load/Unload Cycles 600,000
Warranty 5-year limited
Power & Physical
Read/Write Power ~6.5 W (typical)
Idle Power ~5.0 W (typical)
Dimensions (L×W×H) 147 × 101.85 × 26.1 mm
Weight ~665 g
Operating Temp 5–60 °C

Frequently Asked Questions

Is the HC555 0B48722 SATA or SAS?
This part number (0B48722) is the SATA 6GB/s model — it drops into standard SATA ports on servers, NAS and RAID controllers that support 16TB drives. A separate SAS version exists under a different part number.
Is the HC555 a CMR or SMR drive?
It uses CMR (conventional magnetic recording) with ePMR, so it delivers consistent write performance and full RAID compatibility — unlike SMR drives, which can slow under sustained writes.
Does it work in a NAS or server?
Yes. It is a SATA 6GB/s data-centre drive for servers, NAS and RAID arrays. Confirm your system supports 16TB drives and has a free 3.5-inch bay with a SATA data and power connector.
What do I need to know before buying?
It is a bare internal 3.5-inch SATA drive with no mounting kit or cables, and it ships unformatted for initialisation in your host. Typically in stock with fast delivery across Cyprus.
Singular Expert Insight
The Ultrastar DC HC555 is Western Digital’s current-generation data-centre drive, using ePMR and OptiNAND for dependable 24/7 performance. At 16TB it is a strong mainstream capacity for servers and NAS, sitting below the higher-density HC570/HC580. Building out an array? Pair it with matching drives from our enterprise/server HDD range. For latency-critical tiers, an enterprise SSD is the complement.

Buyer’s Guide

Buy it if
You need 16TB of CMR capacity per bay for a server or NAS
You run 24/7 workloads of up to 550TB/year
You want data-centre reliability and a 5-year warranty
Skip it if
You only need occasional desktop backup — a WD Blue or Red costs less
You need higher capacity — see HC570 22TB / HC580 24TB
You need sub-millisecond latency — choose an enterprise SSD
Also consider
WD Ultrastar DC HC555 20TB (0B48724) for more capacity
WD Gold 22TB for a server/NAS alternative
Seagate Exos X18 16TB as an alternative