Specifications

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M15 Camera Manual: Operating The Camera
© MOBOTIX AG • Security-Vision-Systems • Made in Germany
www.mobotix.com • [e-mail]
3.5 MicroSD Card Recording
3.5.1 Introduction
Flash-based storage devices (MicroSD cards, USB sticks and solid-state
drives) do not contain any moving parts as compared to the commonly
used hard drives. Flash-based storage devices are compact and
highly resistant to moisture and vibrations. They feature low energy
consumption and they do not lose any data in the event of a power
failure, meaning that they are ideal for use with MOBOTIX cameras.
Number of Write/Delete Cycles Per Flash Storage Cell
The number of write/delete cycles of every storage cell of a flash
device is limited. The controller of the flash device automatically
detects individual flash cells that are no longer functioning. The contents of the faulty cell
will then be rebuilt using a checksum and will be moved to a properly working spare cell.
The faulty storage cell will be marked as “bad” and will no longer be used. No data is
lost in this process.
In addition, MOBOTIX cameras constantly monitor activated flash storage devices. MOBOTIX
has developed a technology to test the wear of the flash device by logging the number of
write/delete cycles (patent pending). The flash memory wear is automatically displayed in
the status bar in the live camera image but it can also be viewed at any time in the Admin
Menu> Camera Status dialog box.
Conservative Memory Usage Thanks to MOBOTIX MxFFS File System
MxFFS formatting of the MicroSD card means that the MOBOTIX camera software will use
the flash device as evenly as possible, thus allowing for the maximum possible number
of write/delete cycles. This also means that all storage cells of the flash device will be
written and deleted with the same frequency, if possible. MOBOTIX technology increases
the life of the flash device considerably and also improves the security and the reliability
of the storage process.
Storage Requirements and Life Expectancy of MicroSD Cards
The life expectancy of a MicroSD card increases proportionally to the storage capacity,
since the camera software will execute fewer write/delete cycles on each storage cell.
The first deletion will begin once the SD card has been filled to capacity (first full cycle).
More robust than hard
drives: Flash drives
for recordings