WD Purple Surveillance Hard Drive 4 TB, 256 MB -WD43PURZ
Key Features:

• Engineered for mainstream surveillance systems
• WD AllFrame technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to mainstream surveillance applications
• Supports up to 180TB/yr workload rate and up to 16 bays
• Designed for Surveillance Solutions
• Enhanced Workload Ratings
• Three-Year Limited Warranty