Documentation for C-Werk 2.0.

Previous page General information about configuring archives  General information about the cloud archive Next page

Fragmented files accumulate over time in the Windows file system. This is due to the fact that the operating system sequentially fills the free disk space when writing files.

Free disk space, which appears when old files are deleted, can be located in different parts of the disk; therefore, each file can be split into many fragments.

When reading or writing such a file, the hard drive head must constantly move, which reduces the read/write speed and causes mechanical wear of the disc.

Grundig has developed its own file system SolidStore especially for storing video archives. The system is installed on a blank physical or logical drive, which is fully allocated to C-Werk video archive (see Creating archives). In developing SolidStore, it was taken into account that recording will only be sequenced in one direction (looping mode), and the newest data is written in place of the oldest.

Attention!

Loop recording (FIFO overwriting) should erase the earliest recordings, but in some cases selected recordings within 10% of the oldest ones may be compromised. This feature protects archive volumes from fragmentation.

In such cases, these earliest 10% of videos in archive may have gaps.

By optimizing the reading/writing process we managed to minimize the travel of the hard disk head along its surface and to achieve three important advantages:

  • Enable high read/write speeds, approaching the physical access speed limit of the hard disk.
  • Increase the service life of the hard disk.
  • Solve the problem of data fragmentation: as data is written only in looping mode, fragmentation is minimal and does not accumulate with time. This way, the read/write speed remains high throughout the operation of the video surveillance system.

SolidStore relieves the user from the need to periodically stop the video surveillance system and run the Disk Defragmenter tool. This significantly increases video surveillance uptime and the protected facilities remain under the watchful eyes of the security personnel.

If it is not possible to allocate a separate disk for C-Werk video archive, it can be written as a regular file in the existing Windows file system.

  • No labels