Manual

106
M16 Camera Manual: Operating The Camera
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 com-
monly 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ashdevice
islimited.Thecontrolleroftheashdeviceautomaticallydetectsindi-
vidualash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ashstoragedevices.MOBOTIX
hasdevelopedatechnologytotestthewearoftheashdevicebyloggingthenumberof
write/deletecycles(patentpending).Theash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sowarewilluse
theash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ashdevicewillbewritten
and deleted with the same frequency, if possible. MOBOTIX technology increases the life
oftheash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sowarewillexecutefewerwrite/deletecyclesoneachstoragecell.Therst
deletionwillbeginoncetheSDcardhasbeenlledtocapacity(rstfullcycle).
More robust than hard
drives: Flash drives
for recordings