coolest chkdsk error ever!

C:\Documents and Settings\Owner>chkdsk /f g:
The type of the file system is NTFS.

Chkdsk cannot run because the volume is in use by another
process.  Chkdsk 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.
Volume label is DATAII.
Fixing critical master file table (MFT) files with MFT mirror.
Unreadable master file table.  CHKDSK aborted.