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being triggered,
B will then record. However, if B is no longer being
triggered now, it will not record.
If alarm B is triggered and at the process of recording. However, alarm A,
whose priority is higher than B, is triggered then, B will stop recording at
once, and A will start to record
9.8 Update
For single device
Step 1
：
Copy the upgrade package like “dv425_upgrade_2017xxxxxxxx” to
USB disk or SD card root directory and insert the USB disk or SD card into
DVR.
Step 2
：
Power off the DVR and reboot it, then it will auto upgrade. Or in the
menu Menu -> System -> Update, click OK to confirm to upgrade. Both method
can start the upgrade process.
