The system won??™t allow you to assign drive letters to system volumes, boot
volumes, or volumes that contain the paging file. In addition, you can??™t assign a drive letter to an
Original Equipment Manufacturer (OEM) partition or any GUID Partition Table (GPT) partition
other than a basic data partition.
attributes volume [{set | clear}] [{hidden | readonly | nodefaultdriveletter |
shadowcopy}] [noerr] Displays, sets, or clears attributes on the specified volume. This command
is only available on Windows 2003 and above systems. Use attributes with a volume specification
alone to see the attributes for that volume. The set option adds an attribute, while the clear
option removes the attribute. The hidden attribute hides the volume from view, while the readonly
attribute makes it impossible for the user to write to the volume. The nodefaultdriveletter
attribute prevents the drive from receiving a drive letter during the boot cycle. Generally, there
isn??™t a good reason to use this feature unless you want to create an invisible drive for a specific
reason, such as a ghost backup of the system. The shadowcopy attribute defines the drive as a
shadow copy of another drive.
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