Product Information

• Product Name: Dahua 128GB 2.5-inch SATA SSD
• Model Series: Various (DH-XXX series depending on production batch)
• Brand: Dahua Technology Co., Ltd.
• Category: SATA Solid State Drive
• Release Period: 2019-2022 (various production runs)
• Form Factor: 2.5-inch (standard laptop/desktop size)
• Dimensions: 100mm × 69.85mm × 7mm (standard 7mm height)
• Weight: 45-55 grams
• Enclosure: Aluminum or plastic casing with metal mounting holes
• Color: Typically black or silver aluminum casing

Interface & Compatibility

• Interface: SATA III 6Gb/s (SATA Revision 3.0)
• Backward Compatibility: SATA II 3Gb/s and SATA I 1.5Gb/s
• Connector: Standard SATA data (7-pin) and power (15-pin) connectors
• Host Interface: Serial ATA with AHCI (Advanced Host Controller Interface) protocol
• Maximum Bandwidth: 600 MB/s theoretical (SATA III limit)
• System Compatibility:
  • Desktop PCs with 2.5-inch bays or 3.5-inch adapters
  • Laptops with 2.5-inch drive bays
  • All-in-One computers with 2.5-inch slots
  • External enclosures (USB to SATA adapters)
  • Gaming consoles with 2.5-inch upgrade capability

Performance Specifications

• Sequential Read Performance: 500-550 MB/s (maximum, SATA III limited)
• Sequential Write Performance: 400-450 MB/s (maximum, depends on cache)
• Random Read Performance: 60,000-70,000 IOPS (4KB QD32)
• Random Write Performance: 55,000-65,000 IOPS (4KB QD32)
• Access Time: 0.1ms typical (vs 10-15ms for HDDs)
• SLC Cache Size: Dynamic, approximately 12-24GB depending on free space
• Sustained Write Speed: 80-150 MB/s after SLC cache exhaustion (for TLC models)
• Real-World Performance:
  • System boot time: 15-25 seconds (vs 45-60 seconds for HDD)
  • Application loading: 2-3x faster than traditional HDDs
  • File transfers: Consistent for small files, variable for large files beyond cache

Controller & Architecture

• Controller Options:
  • SMI SM2258XT (DRAM-less, 4-channel)
  • Maxio MAS0902 (DRAM-less, 4-channel)
  • Phison PS3111-S11 (DRAM-less, 4-channel)
• Controller Architecture: 32-bit/64-bit ARM-based RISC processor
• Flash Channels: 2-4 NAND channels (depending on specific controller)
• Error Correction: BCH or LDPC ECC engine (depending on controller generation)
• Wear Leveling: Dynamic wear leveling with garbage collection
• Bad Block Management: Automatic bad block detection and replacement
• TRIM Support: Yes, with both manual and automatic TRIM support
• NCQ Support: Native Command Queuing up to 32 commands

NAND Flash Memory

• NAND Type: 3D TLC (Triple-Level Cell) or QLC (Quad-Level Cell) NAND
• 3D Layers: 64-layer or 96-layer 3D NAND technology
• Manufacturer: YMTC (Yangtze Memory Technologies) or other Chinese NAND producers
• Memory Organization: Typically 128Gb (16GB) dies, 8 dies for 128GB capacity
• Page Size: 16KB standard page size
• Block Size: 4MB typical block size
• P/E Cycles:
  • TLC: 500-1,000 cycles per cell
  • QLC: 150-500 cycles per cell
• Over-provisioning: 7-8% reserved for wear leveling and performance maintenance

Memory Configuration

• DRAM Configuration: DRAM-less design (no physical DRAM cache)
• HMB Support: May support Host Memory Buffer if connected via NVMe bridge (uncommon for SATA)
• SLC Cache: Dynamic SLC caching using portion of TLC/QLC NAND as pseudo-SLC
• Cache Strategy: Adaptive caching based on workload patterns and available free space
• Performance Impact: DRAM-less design may affect random performance compared to DRAM-equipped SSDs

Endurance & Reliability

• TBW Rating: 40-60 Terabytes Written (40,000-60,000 GB)
• DWPD Calculation: 0.07-0.11 Drive Writes Per Day (over 3-year warranty period)
• MTBF: 1,500,000 hours (Mean Time Between Failures)
• UBER: <1 sector per 10^16 bits read (Unrecoverable Bit Error Rate)
• Data Retention:
  • 1 year at 30°C after endurance limit reached
  • 3 months at 40°C after endurance limit reached
• Power Loss Protection: Basic capacitor protection (if any, typically minimal on budget drives)
• SMART Monitoring: Full SMART attribute reporting with predictive failure alerts

Power Consumption

• Active Power (Read/Write): 1.8-2.5W (during operations)
• Idle Power: 0.5-0.8W (drive idle, ready state)
• Sleep Power: 0.1-0.3W (low power sleep state)
• DevSleep Power: 5-10mW (device sleep mode)
• Operating Voltage: 5V ±5% (SATA power connector)
• Current Requirements:
  • +5V: 1.0A typical, 1.5A maximum
  • +12V: Not required (2.5-inch drives use 5V only)
• Power Management: Supports SATA power management states (Partial, Slumber, DevSleep)

Environmental Specifications

• Operating Temperature: 0°C to 70°C (32°F to 158°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Operating Humidity: 5% to 95% RH (non-condensing)
• Storage Humidity: 5% to 95% RH (non-condensing)
• Operating Altitude: Up to 10,000 feet (3,048 meters)
• Shock Resistance:
  • Operating: 1500G, 0.5ms half-sine
  • Non-operating: 1500G, 0.5ms half-sine
• Vibration Resistance:
  • Operating: 20-2000Hz, 20G
  • Non-operating: 20-2000Hz, 20G

Compatibility & System Requirements

• Operating System Support:
  • Windows 7/8/10/11 (requires AHCI mode for optimal performance)
  • Linux (all major distributions with kernel 2.6.29+)
  • macOS (on compatible Mac systems with SATA interface)
  • Chrome OS
  • FreeBSD, Solaris, other Unix-like systems
• BIOS Compatibility: Works with both Legacy BIOS and UEFI systems
• Adapter Compatibility:
  • 3.5-inch to 2.5-inch mounting adapters for desktop bays
  • USB to SATA external enclosures
  • SATA port multipliers (with limitations)

Features & Technologies

• SATA Features:
  • AHCI 1.3.1 compliant
  • Native Command Queuing (NCQ) up to 32 commands
  • Hot-plug support (if supported by host controller)
  • Staggered spin-up support
• Data Protection:
  • ECC with BCH or LDPC algorithm
  • End-to-end data path protection
  • RAID support (as part of array)
• Performance Features:
  • TRIM command support (ATA Data Set Management)
  • Background garbage collection
  • Write amplification reduction technologies
  • Thermal throttling for temperature management
• Security Features (if available):
  • AES 256-bit hardware encryption (may not be present on all models)
  • ATA Security feature set (password protection)
  • Secure Erase support

Warranty & Support

• Warranty Period: 3 years from purchase date
• Warranty Coverage: Defects in materials and workmanship under normal use
• Exclusions: Physical damage, liquid damage, misuse, data loss
• Support Channel: RMA through distributor or retailer
• Technical Support: Limited documentation, basic troubleshooting available

Package Contents

• Dahua 128GB 2.5-inch SATA SSD
• Mounting screws (typically 4 pieces for 2.5-inch installation)
• Basic documentation/warranty information
• Anti-static packaging
• Note: No SATA cables, adapters, or cloning software included

Installation Guidelines

• Desktop Installation:
  • Use 2.5-inch bay or 3.5-inch adapter bracket
  • Connect SATA data cable to motherboard
  • Connect SATA power cable from PSU
  • Secure with mounting screws
• Laptop Installation:
  • Remove existing 2.5-inch HDD/SSD
  • Transfer any mounting brackets or rails
  • Insert new SSD and secure
  • Reconnect SATA connector
• Software Setup:
  • Initialize drive in Disk Management (Windows) or Disk Utility (macOS)
  • Create partition and format (NTFS for Windows, APFS/HFS+ for macOS, ext4 for Linux)
  • Enable TRIM for optimal performance maintenance

Performance Comparison

• Compared to HDD:
  • 5-10x faster sequential read/write
  • 50-100x faster random access times
  • Silent operation (no moving parts)
  • Lower power consumption
  • Shock and vibration resistant
• Compared to NVMe SSD:
  • 1/4 to 1/5 the sequential speed
  • Similar random performance for many everyday tasks
  • Wider compatibility with older systems
  • Lower cost per GB typically
• Compared to other SATA SSDs:
  • Similar maximum performance (SATA III limited)
  • Potentially lower sustained write performance than DRAM-equipped models
  • Comparable real-world performance for most consumer workloads

Use Case Recommendations

• Ideal Applications:
  • Budget desktop system boot drive
  • Laptop HDD replacement for performance upgrade
  • Secondary storage drive for games or media
  • Older system revival (Windows 7/8 machines)
  • External backup drive (in USB enclosure)
  • Light duty office/production systems
• Less Suitable For:
  • High-performance gaming systems (better served by NVMe)
  • Video editing workstations (limited capacity and performance)
  • Write-intensive server applications (low endurance rating)
  • Primary storage for large media collections (limited capacity)
• Capacity Planning: 128GB is minimal for Windows 10/11 + applications; consider 256GB+ for boot drives

Manufacturer Context

• Company Background: Dahua Technology, primarily known for security/surveillance equipment
• Storage Division: Diversification into consumer storage products
• Quality Approach: Cost-competitive manufacturing with basic quality controls
• Market Position: Budget segment competing on price rather than premium features

Important Considerations

• Actual Usable Space: Approximately 119GB after formatting (binary vs decimal calculation)
• Performance Realities: Maximum speeds only achievable with SATA III interfaces and proper configuration
• Endurance Limitations: 40-60 TBW suitable for light use; heavy writers should consider higher endurance drives
• System Requirements: Ensure BIOS is set to AHCI mode (not IDE) for optimal performance
• Clone/Migration: Consider cloning software for system migration from existing drives
• Backup Strategy: Essential with any storage device; SSDs can fail without warning signs
• Value Assessment: Offers significant performance improvement over HDDs at low cost for compatible systems