autodiscovery of filesystems with CDM is switched on by default, and can be turned off by changing the below key with Raw config:
<fixed_default>
active = no
For ignoring a specific file system type:
cdm IM Configuration - CA Unified Infrastructure Management Probes - CA Technologies Documentation
"Filesystem Type Filter: specifies the type of the filesystem to be monitored using regular expressions.
If we specify RegEx as *, then all filesystems are enabled for monitoring. Or you can also specify ext* to allow monitoring of filesystems with "ext". For example ext4 or ext5.
If we specify a negative RegEx, then specified filesystems are excluded from monitoring. For example, if we do not want to monitor ext4 filesystem, use /^(?!ext4)/
If this field is blank, no filesystem is enabled for monitoring. (default)"
By default you you have this expression: /^(?!.*?(tmpfs|nfs|iso9660)).*/
Have you tried modifying this expression by adding the filesystem type you would like to not to be monitored?