This short guide covers the most common storage-related errors Users might be met with while using Wisenet WAVE. Such errors are referred to as "Storage Failure" in the event log.
"Not enough HDD/SSD speed for recording".
During the regular recording process, the WAVE Server stores all of the video frames received from every camera stream in separate memory buffers. Later on, another WAVE Server process tries to write these frames from the buffers to the physical drive, according to the recording schedule. These buffers have certain reasonable limits, independently in megabytes and number of frames.
If due to whatever reason the storage drive write speed can not match the rate of incoming video packets/frames, these buffers might overflow. When this happens, the WAVE Server has to drop the oldest packages. After that, the error is generated with the number of the dropped frames. Users might find which camera feed specifically suffered from this by reading the main WAVE Server log file.
If a user receives such messages randomly, from time to time with a low number of packets dropped, there is typically nothing to worry about. Essentially, it signals that the System is near its' performance limits. So if a user is planning to expand the System, they should expect that the number of dropped frames will drastically increase, and resolve it in advance. The available options are to decrease incoming bitrate by changing with fps/image quality, resolution, replace drives with faster ones, or simply add more drives, which spreads the recording load across more drives.
If a user receives such messages all the time it is something to worry about since a significant part of the footage is likely persistently lost. In this case, the user should start with monitoring the write capabilities of the disk and check its state. If everything is ok and hardware issues are not observed, the solution should be the same as mentioned previously.
There is one more case when such an error might appear. If a disk completely fails (local) or goes offline (network) this message will likely be the first thing the user notice in the logs. Check your system to ensure that all drives are present and functioning. You can also check the health of the drives to ensure they are not failing, such as reading the SMART error codes from the disk.
For Specific Hanwha Techwin WAVE Server Hardware, please see this article:
"System disk is almost full".
This error appears if the WAVE Server detects that the free space of the System partition drops under 1 GB for ARM devices and 5 GB for Desktop devices.
Hanwha Techwin considers it as an issue that should be resolved because both OS and WAVE System might suffer significantly due to that. Although it is understandable why an OS needs a lot of free space, Wisenet WAVE also needs a storage bugger as it keeps important data in the system partition (e.g. system database, motion detection data indexes, audit log, etc.).
"I/O error occurred".
This trivially means that Operating System returned a read/write error message to WAVE Server on the command to read or write data block. Depending on the setup this message might pop up in pair with the previous one. It definitely tells the user that major issues are happening (e.g. the Operating System met the bad blocks, the drive is unexpectedly remounted to a read-only state or the network file system returned remote service inaccessibility).
You should also check your system for software that may be consuming large amounts of system resources, such as anti-virus, malware scanners, backup utilities, etc., which could lower the throughput and generate errors.