I am using format command in cmd to format a USB flash drive.

M:\>format /FS:FAT32 /Q
Required parameter missing -

M:\>format M: /FS:FAT32 /Q
Insert new disk for drive M:
and press ENTER when ready...
The type of the file system is FAT32.
QuickFormatting 14999M

Format cannot run because the volume is in use by another
process.  Format may run if this volume is dismounted first.
ALL OPENED HANDLES TO THIS VOLUME WOULD THEN BE INVALID.
Would you like to force a dismount on this volume? (Y/N) y
Volume dismounted.  All opened handles to this volume are now invalid.
Initializing the File Allocation Table (FAT)...
Volume label (11 characters, ENTER for none)?
Format complete.
      14,6 GB total disk space.
      14,6 GB are available.

        8 192 bytes in each allocation unit.
    1 917 823 allocation units available on disk.

           32 bits in each FAT entry.

Volume Serial Number is E00B-2739

M:\>

Is it safe to force a dismount like this, and make the handles invalid?