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Your CCTV NVR Has 32 Cameras Recording 24/7. The Drives Inside It Are Consumer-Grade. They Are Failing One at a Time.

Consumer hard drives are rated for 8 hours of operation per day, 240 power-on hours per year, and workloads measured in tens of terabytes. Surveillance NVRs run 24/7/365, write continuously at near-line-rate, and push 180 TB/year through each drive in a 32-camera deployment. The WD Purple Pro 18TB is an enterprise-class surveillance drive built for exactly this workload: 7,200 RPM, CMR recording, 550 TB/년 작업량 등급, and AllFrame AI firmware that optimizes write patterns for 32 simultaneous HD streams without dropping frames. It is the drive that survives a 24/7 surveillance environment for five years without a single dropped frame or a single failed drive in the array.

기술 사양

매개변수	사양
용량	18결핵 (또한: 8결핵, 10결핵, 12결핵, 14결핵, 16결핵, 20결핵, 22TB in Purple Pro series)
폼 팩터	3.5-인치 LFF
인터페이스	SATA 6Gb/초
회전 속도	7,200 RPM
녹음 기술	CMR (기존 자기 녹음) — no SMR write penalty
캐시 버퍼	512 MB
지속적인 전송 속도	까지 270 MB/s
평균 지연 시간	4.16 MS
MTBF	2,000,000 시간 (enterprise-class, surveillance-optimized)
워크로드 비율 제한	550 TB/년 (enterprise-class — 3x consumer drive workload rating)
AllFrame AI	Firmware-optimized ATA streaming command set: 지원합니다 64 HD cameras per drive, reduces frame loss, prioritizes write integrity over read caching
힘 (게으른 / 운영 중 / Standby)	2.8승 / 6.5승 / 0.8승
씰링	헬륨 밀봉 (ultrastar-derived HelioSeal technology)
섹터 크기	512이자형 (512-byte emulation)
회전 진동	RV sensor array — compensates for multi-drive vibration in NVR chassis
충격 (운영 중 / Non-Op)	30G / 250G (lower operating shock tolerance than enterprise drives — designed for stable NVR mounting)
물리적	147.0 엑스 101.6 엑스 26.1 mm, 690g
온도	0C to 65C
보증	5-년 한정 (제조업체), 3-year with WD Purple Pro registration

Purple Pro vs Exos vs Red Pro — The WD Portfolio for Surveillance

특징	Purple Pro 18TB	엑소스 X24 24TB	Red Pro 20TB
다음을 위해 설계됨	24/7 surveillance NVR, DVR, video analytics	Enterprise data center, rack servers	나스, home/small office, RAID
Workload Rating	550 TB/년	550 TB/년	300 TB/년
AllFrame AI	Yes — 64 cameras, streaming write optimization	아니요	아니요
RAID 지원	지원됨 (NVR-specific RAID: RAID 5, RAID 6 recommended)	Full enterprise RAID (0/1/5/6/10/50/60)	RAID 0, 1, 5, 10 오직 (아니요 6/60)
Vibration Protection	RV sensor (multi-drive NVR optimized)	RV sensor (rack server optimized)	RV sensor (NAS optimized)
다음에 가장 적합	CCTV, access control, body-worn camera storage	서버, SAN, 그만큼, backup targets	NAS devices in climate-controlled environments

Retention Math: How Many Days of 4K Video Fit on an 18TB Drive

Camera Count	Resolution / Bitrate	Daily Storage Per Camera	Daily Total	Retention on 18TB (Single Drive)	Retention on 8x 18TB (RAID 5, 126TB Usable)
32 cameras	4케이, 15fps, H.265, 8 MBPS	86 GB	2.75 결핵	6.5 날	46 날
64 cameras	1080피, 15fps, H.265, 4 MBPS	43 GB	2.75 결핵	6.5 날	46 날
128 cameras	1080피, 15fps, H.264, 8 MBPS	86 GB	11 결핵	1.6 날	11.5 날

A single 18TB Purple Pro delivers 6.5 days of retention for a 32-camera 4K NVR — typical for convenience stores, gas stations, and small retail. An 8-drive RAID 5 array delivers 46 days — appropriate for corporate campuses, warehouses, and mid-sized retail. Scale up deployment with additional NVRs or larger arrays for multi-site, casino, or city-wide surveillance requirements.

Compatible NVR Platforms

SATA 6Gb/초, compatible with any NVR or DVR with 3.5-inch SATA bays. Tested with Hikvision, Dahua, Axis, Milestone, Genetec, and ExacqVision NVR platforms. Supports WDDA (Western Digital Device Analytics) for predictive drive health monitoring in supported NVR software.