How to find Time Machine disk image? I try to compact Time Machine disk image but i can't find it. TM is in BackupDisk.

$ cd /Volumes
$ ls -1
Macintosh HD
MobileBackups
BackupDisk
$ sudo ls -l BackupDisk/
total 0
drwxrwxrwx@ 0 root wheel 0 Apr 24 11:17 Backups.backupdb


I think result of this last command should end up with ".sparsebundle".

How i can find what i need to put to ??? in following code:

sudo su - root
hdiutil compact /Volumes/???/???.sparsebundle
Time Machine only uses a disk image when backing up to a network destination (OS X Server or Time Capsule). When backing up to a local volume (as you appear to be doing), it stores the backed-up files natively on the volume (inside the Backups.backupdb folder), with no disk image.