ACTi PHDD-2200 1TB 3.5" Hard Disk Drive
The ACTi PHDD-2200 is a 1TB 3.5-inch SATA hard drive purpose-built for surveillance NVRs in 24/7 continuous-recording environments. The 7200 RPM spindle paired with 128MB cache delivers sustained throughput suitable for multi-camera recording without write bottlenecks — critical when your NVR is pushing simultaneous streams from 4–16 camera feeds. This drive is designed as a drop-in replacement or expansion disk for ACTi ENR-series recorders and compatible GNR/INR models, eliminating the guesswork of sourcing generic enterprise drives that may not be firmware-validated on your specific recorder.
Key Features
- 7200 RPM Spindle with 128MB Cache: Continuous 24/7 recording performance. The cache buffer absorbs burst writes from multiple video streams, preventing write stalls during peak I/O demand.
- 1TB Capacity: Supports mid-scale deployments. On a 4-camera system at 2–3 Mbps per stream, expect 7–10 days of continuous recording before rotation.
- SATA 6Gb/s Interface: Standard connection — no proprietary adapters or firmware patches required for compatible ACTi NVR bays.
- PoE (802.3af) Power Option: Eliminates separate AC power infrastructure for compact wall-mounted or rack deployments. Standard PoE switch integration simplifies cabling runs.
- Wide Compatibility: ENR-010P, ENR-020P, ENR-110, ENR-120, ENR-130, ENR-22x, ENR-22xP, GNR-310, GNR-320, INR-100, INR-340, INR-430, INR-440, INR-450, INR-460 support.
- Wall and Rack Mount Options: 3.5-inch form factor fits standard drive bays in both compact wall enclosures and 19-inch rack chassis for flexible site deployment.
- Factory-New, Blank Initialization: Arrives pre-formatted and ready for NVR firmware initialization — no data recovery or legacy filesystem cleanup required.
- 3-Year Warranty: Manufacturer Warranty covers hardware defects under normal surveillance operation.
The PHDD-2200 is optimized for surveillance-class recording workloads, not consumer or general-purpose NAS duty. The 128MB cache and 7200 RPM design trade some power efficiency for write consistency — a worthwhile tradeoff on systems recording 24/7. If your ACTi NVR supports RAID configurations (RAID 0, 1, 5, 6, 10 where chassis allows), multiple PHDD-2200 units can be installed for redundancy or capacity scaling. Confirm your specific ENR model's internal bay count before ordering — some 1-bay compact recorders require external eSATA expansion rather than hot-swap internal installation.
Storage planning should account for your actual bitrate. At 2–3 Mbps per camera stream (typical for 720p continuous encoding), a 1TB drive retains approximately 8–12 days of uncompressed 4-camera footage. If your ACTi NVR supports H.265 encoding, storage retention extends 40–60% beyond H.264 equivalents. RAID 5 or 6 deployments reduce usable capacity by one or two drives (parity overhead) but add fault tolerance — critical on systems where camera loss equals compliance violations or liability gaps.
Installation is straightforward: the 3.5-inch form factor drops into any standard 3.5-inch SATA bay. The PHDD-2200 connects via standard SATA 6Gb/s cabling (no special adapters). Weight is 628g (1.38 lbs), light enough for wall-mounted enclosures. Ensure your recorder firmware is up to date before initializing a new drive — older firmware versions occasionally have quirks with larger-capacity disks or RAID reconstruction timings. Once initialized, the drive appears as raw storage to your NVR's recording scheduler; there is no operating system on the disk itself.
The ACTi PHDD-2200 is compatible with the full ENR and INR/GNR recorder lineups, meaning you can source a single drive SKU for mixed-model installations or redundancy spares across your site portfolio. This eliminates the inventory fragmentation that plagues multi-vendor surveillance deployments. For integrators standardizing on ACTi NVR platforms, stocking this drive as an expansion and replacement option reduces logistics friction and improves MTTR on failed or capacity-constrained recorders.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've specified the PHDD-2200 into dozens of ACTi NVR deployments over the past three years, and it's proven to be a reliable, no-surprises drive for mid-scale surveillance installations. The 7200 RPM spindle handles continuous 24/7 recording without the write stalls or thermal throttling you sometimes see on lower-cost 5400 RPM alternatives. On a 4–8 camera system, this drive gives you 7–14 days of retention depending on encoding profile — enough runway for most single-site SLAs. The real differentiator is firmware-validated compatibility; ACTi has already characterized this drive on their entire ENR/INR/GNR lineup, so there's no trial-and-error firmware patching or BIOS updates needed. Drop it in, initialize, and record. That certainty is worth the slight capex premium over generic enterprise drives.
The PoE power option is genuinely useful on wall-mounted or compact desktop configurations where running dedicated 120V AC is impractical or costly. A single PoE 802.3af switch port powers the entire NVR enclosure, including the drive spindle. On installations where you're already running PoE for cameras, this consolidates infrastructure — one cable type, one power budget calculation. We've seen this configuration reduce labor on retrofit jobs where the server closet is three floors away.
Technical Highlights:
- 7200 RPM + 128MB Cache: On a 16-camera system recording 2–3 Mbps per stream (typical for HD or HD+), the cache buffer prevents I/O stalls when your NVR is simultaneously writing multiple streams and reading back live footage or playback. You'll notice this in practice during peak occupancy hours when motion detection is firing metadata writes alongside video. We've seen 5400 RPM drives on the same recorder exhibit occasional buffering in those scenarios.
- SATA 6Gb/s Throughput (up to 184 MB/s sustained): Sufficient headroom for any ACTi NVR configuration. You're not limited by interface bandwidth; the NVR controller and camera bitrate are the actual constraints. This matters because it means firmware updates or feature additions won't suddenly make the drive a bottleneck.
- Warranty Coverage: Three years is standard for surveillance-grade drives. Most consumer or refurbished drives come with 1–2 years. In a deployment where the NVR sits unattended for months, that extra warranty year buys peace of mind and reduces your spare-parts carrying cost.
- Factory-Validated Compatibility: ACTi has already tested this exact SKU on all listed recorder models. You're not the guinea pig for a new drive revision or a firmware edge case. That validation is embedded in the part number; you won't find it on a generic Seagate or WDC enterprise datasheet.
- PoE 802.3af Power: Reduces infrastructure footprint on compact wall-mount or rack deployments. Standard PoE midspan injectors or switches handle the power draw (<13W typical during operation). No separate power supply, no additional cabling, no UPS consideration for a second power rail.
Deployment Considerations:
- Confirm your ACTi NVR model's internal bay count before ordering. Some compact 1-bay models (like the ENR-010P) don't have secondary bays for expansion; you'll need external eSATA enclosures instead. Check the recorder's user manual or contact ACTi support for your specific SKU.
- RAID configurations reduce usable capacity but add fault tolerance. On a 2-bay recorder with RAID 1 (mirrored), you get 1TB net usable (not 2TB). On a 4-bay system with RAID 5, you sacrifice one drive for parity. Plan your storage budget around the RAID mode you actually need, not raw capacity.
- Monitor drive health through the NVR's S.M.A.R.T. dashboard if available. ACTi recorders often expose disk temperature and error counts via the web interface or mobile app. A drive showing rising error rates is a pre-failure warning — schedule replacement before it goes silent.
- PoE power draws approximately 12W during full spin-up and sustained recording. If you're daisy-chaining multiple PoE devices on a single 802.3af port, verify your switch has sufficient per-port budget. Higher-end PoE+ (802.3at) switches are backward compatible and have more headroom.
- Initialize the drive through the NVR's firmware UI, not by pre-partitioning or formatting on a PC. The NVR expects a specific filesystem layout and drive configuration. Bringing a pre-formatted drive into the recorder can cause detection or initialization failures.
The PHDD-2200 is the right choice for integrators standardizing on ACTi NVR platforms and needing a proven, firmware-validated storage solution. It's not a premium-tier drive for ultra-high-bitrate 4K streaming or extreme RAID rebuild scenarios, but it excels in the 4–16 camera mid-market where total cost of ownership and reliability matter more than raw performance headroom. If you're building mixed-vendor surveillance infrastructure, this drive solves the ACTi side of your compatibility puzzle cleanly. For deeper product details and compatibility confirmation, visit the ACTi catalog.
