You have performed DCS Anti Malware scan and observed that only local drives are scanned.
Release : DCS 6.8.x, 6.9.x
Component : UNIX Anti Malware
The option to Scan External Drive in default detection configuration in DCS is disabled by default.
If you require to scan external drives perform the following configuration change:
#1 Enable Scan External Drive option in Java Console -->Config-->Detection-->Default Detection Parameters
#2 Apply the modified configuration to the UMC Security Group