Disc for digital video camera recorder7/14/2023 ![]() This is best suited for determining how many hours of recording our storage solution will hold and can then be used for calculation of days of recording taking into account various other factors. For this, we select MB/h (Megabytes per hour). To be precise, you will need to make your own calculations.įirstly, we need to convert the bit rate into a more usable unit. While the marketing material will provide for X days of recording, a general ‘days’ figure may not address your recorder’s usage pattern. While technically Mb/s (Megabits per second or bit rate) can also be used as a measure of storage used over time, it’s not very useful to us when making calculations. 3) What is the recording capacity of your system? This would enable you to set a lower bitrate and achieve similar image quality. ![]() FPS does not directly translate into HDD consumption, although by setting a lower FPS you can potentially achieve a higher image quality on any particular bit rate. It is a common error to consider FPS (frames/second) as affecting the space consumed by recording. Swann recorder operating system #2 (bitrate (Kbps)) Swann recorder operating system #1 (Video quality setting = bitrate (Mbps)) Each camera will usually have the option of setting individual bit rates, but it is recommended that you use a consistent bit rate across all channels for ease of use. The primary recording setting that affects your HDD space consumed is the recording bit rate set on the camera channel. 2) Recording settings which ones affect HDD usage? does and how to read the output to determine if there may be a problem. There are many on-line resources that explain what S.M.A.R.T. It is possible to determine from performance metrics when a HDD is more likely to fail, although this is not always possible with all failures. S.M.A.R.T., or Self-Monitoring, Analysis and Reporting Technology, is a feature of modern HDDs to alert the user to potential future hardware failures. When we list the HDD capacity on our product information, we use the figure that is provided by the HDD manufacturer. Also, file system overheads consume some available HDD space which combined with the binary-decimal differences result in a number that is a bit smaller than the capacity that the manufacturer assigns to the HDD. Unfortunately, binary and decimal does not match up exactly, so the space reported will be slightly less due to this. This is because the HDD manufacturers calculate capacity using decimal notation, whereas a computer file system (and therefore your DVR) calculates file system capacity in binary. You will notice that the total space displayed for each drive does not appear to match up exactly with the HDD capacity that was provided by our information or by the HDD manufacturer (if you installed your own HDD). You need this information to calculate available recording time. For multiple drives, you can usually just add up each Total Space indicator to get the total recording space available. The information presented is fairly basic, usually containing just a label for each HDD installed, the Total Capacity of each drive and the Free Space left on each drive. Swann recorder operating system #2 (1TB HDD) Swann recorder operating system #1 (2TB HDD) ![]() ![]() While we will not describe the exact procedure here to access the HDD page (refer to your system documentation) we will show our 2 most common recorders’ HDD pages so you are familiar with the layout. ![]() Some also have the ability to interface with the HDD’s internal reporting mechanism (called SMART) which can alert the user to possible faults before they compromise recording. How should you assess the recording capacity on the basis of time? 1) Checking your system’s HDD statusĪll Swann recorders have a status page where you can examine the details of the HDD(s) connected. What is the recording capacity of your system? Where do you find the information required to assess your system and how to interpret it? We will address the following questions with this article. As a prudent user, you should assess your storage both when you first acquire your unit and on an ongoing basis to determine if the current storage meets your requirements. One of the most important functions of your video recorder is the storage and archiving of recorded footage for later playback and evidence collection. ![]()
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