Canon vb-s30D Manual

Disk Space Management (Important)

115

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„ Action When the Threshold Level is Reached

Recording continues, however, the Storage Server starts 

deleting recording files, beginning with old files, and 

issues an event.

• Recording files are deleted, even if they have not reached the 

[Maximum Storage Period]. However, if the oldest file is 
currently in use by the Viewer (for example, for playback of 

recorded video), it will not be deleted and the next oldest file 

will be deleted instead. Deletion continues sequentially until 
the free disk space meets or exceeds the threshold again. For 

details on saving files, see Chapter 8.

• Normally, a recording file for which the minimum storage 

period has not elapsed is excluded from deletion. Note that 

such files are also deleted if the free disk space cannot meet 
and exceed the threshold value by deleting all the other files.

The threshold level is considered reached when the 

amount of free disk space drops below the following level.

(Number of cameras + 1) x 64 MB

„ Action When the Limit Level is Reached

The Storage Server stops recording and issues an event 

when the free disk space drops to this level.

The Storage Server resumes recording and issues an 

event when the free disk space increases above this level 

after deleting recording files.

The limit level is considered reached when the amount of 

free disk space drops below 64 MB. This value is fixed.

Threshold 

level

Delete 
oldest first

Notification

Deleting files on <Drive 
Letter> drive due to low 
free disk space: Started

• The threshold level is to protect against reaching the limit 

level. We recommend that you take appropriate measures, 

such as deleting unnecessary recording data, when the 

event for the low remaining disk space notification level 
occurs.

• Storing recordings that cause the threshold level to be 

exceeded increases the load on the Storage Server and may 

cause recording to be interrupted, resulting in incomplete 

recordings. We strongly recommend that you operate the 
Storage Server at below the threshold level.

• If e-mail notification is specified, an e-mail message is sent 

for the event that occurs at each level (p. 48).

• Note that the threshold level conditions may be met before 

the low remaining disk space notification level conditions are 

satisfied, depending on the circumstances. For example, a 

large number of cameras with limited disk capacity may 
cause a value for (Numbers of cameras +1) x 64 MB to be 

larger than the value of disk capacity x low free disk space 

notification setting/100.

Deleting files on <Drive 
Letter> drive due to low 
free disk space: Started

Recording 
stopped 
notification

Delete 
oldest first

Notification

Limit level