User manual
 G-P6019-TM001  
ST Electronics (Info-Security)    ISSUE A   
  20 
Problem  Query  Possible reason and remedy 
The drive is not
recognized. 
Is the file system 
supported by the 
operating system? 
When using an existing drive in a new 
operating system, ensure that the file 
system used by the drive is compatible 
with the new operating system. 
  Is your DiskCrypt 
Mobile DCM300 
connected to a USB 
port? 
Ensure that the DCM300 is plugged into 
a USB port directly rather than an 
extension cable or hub. If the drive isn’t 
recognized when plugged into the front 
USB ports, try the rear USB ports. 
  Are you using the 
included DiskCrypt 
Mobile USB cable? 
Only use the included DiskCrypt Mobile 
USB2.0 certified Y-cable. Other USB 
cables may be of inferior quality. 
  Do you hear clicking 
sounds from your 
drive? 
The drive might be experiencing trouble 
spinning up due to insufficient power 
from the USB port(s). Connect both USB 
connectors directly into your PC’s USB 
ports. Do not connect them to extension 
cables or hubs. If this still doesn’t work, 
an extra power adaptor is needed. 
The drive is 
performing 
very slowly 
Is your DiskCrypt 
Mobile DCM300 
connected to a USB 
2.0 port? 
To get USB 2.0 Hi-Speed performance, 
ensure that your DCM300 is connected 
to a USB 2.0 port. 
  Are you using the 
included DiskCrypt 
Mobile USB cable? 
Only use the included DiskCrypt Mobile 
USB2.0 certified Y-cable. Other USB 
cables may be of inferior quality. 
  Is DiskCrypt Mobile 
DCM300 plugged into 
a USB hub? 
Connect the DCM300 directly to two USB 
2.0 ports on your computer 
  Are other USB devices 
connected to the 
same port? 
Disconnect any other USB devices and 
see if performance improves. 










