Digital Intelligence UltraBlock USB User Manual page 17

Windows Drive Letter Access. Windows NT/2K/XP may attempt to update
(write to) an NTFS/FAT file system the first time the volume it is attached to a
system. In the event that Windows tries to perform this update, the write
attempts to the drive will be blocked. This will prevent Windows from providing
logical disk access to the attached NTFS/FAT file system, effectively resulting in
an NTFS file system for which no drive letter is assigned. This condition is a
function of the Windows NT/2K/XP operating system and happens specifically
because the Write Blocker is performing properly. Although logical disk access
will not be provided, the drive will still be able to be forensically imaged at the
physical level.
Firmware updates. If there is a need to update firmware please consult the
Digital Intelligence web site support pages located at:
http://www.digitalintelligence.com/support.php
12
UltraBlock™ USB User Manual