IPVMU Certified | 05/10/15 12:30pm
Also, it's optimized for larger systems, up to 64 cameras, although no word on how this is done or what this means, exactly.
Simple math really, once you know how many MB the camera is. ;)
At ISC this year at the Hikvision booth a Hikvision rep said the Purple tech was developed by Hikvision and licensed it to WD. Any truth to this?
IPVMU Certified | 05/10/15 06:55pm
Any word if WD is obsoleting non-NV purple drives?
Hi all. I believe I can clarify the Purple NV product for you.
First off, it does not replace the Purple product, which has been a commercial and reliability success story, and we expect that to continue.
The NV version represents an enhanced version of Purple, and features the 3 following differences:
- Tarnish Resistant Components. This is achieved via a PCBA coating process, which encapsulates the external circuit board and provides protection against harsh airborne agents.
- The addition of Rotational Vibration (RV) Sensors. These hardware sensors, combined with a significantly deeper servo positioning control algorithm, allow for use in high vibration systems. Typically, this translates to an ability to maintain throughput performance in a RAID environment. It is also effective in high density chassis’ that may utilize high/variable speed fans. (This is the capability that allows this version of the drive to be “spec’d” for higher camera counts, as utilizing RAID achieves a spindle multiplication based performance advantage)
- Adaptive Caching Firmware. While the Purple drive is tuned for streaming video files and has a write/read cache algorithm to match this use case, the NV version has this “AllFrame Technology” plus the ability to revert to a more RAID appropriate cache management that might be tough of as “Server Mode”. This allows the NV version to stay in step with multiple file system types, which in turn leads to better performance and higher reliability.
Disclaimer: I work for HDSTOR, a niche distributor of hard drives focused on the security industry. We sell Seagate and HGST drives, but the majority of our sales are WD. We greatly appreciate the value of the IPVM community and it's non-commercial nature. We only post or comment when we believe we have factual, helpful information for the IPVM community.
Director of Engineering Service, HDSTOR Inc.