![]() ![]() What you really want to know is which file(s) are open on the volume, so you have a clue as to what to quit to enable the volume to be ejected cleanly. ![]() When it has occurred in the Finder, solutions are harder to come by. ![]() It’s also worth double-checking the volume that you’re trying to run First Aid on: if it’s one of the current boot volume group, System or Data, then you’re probably better off doing this in Recovery mode anyway. This seems to be improving steadily, and less likely to occur in Big Sur than Catalina, for example. It’s unusual for this not to work at all, although it may take a couple of attempts. In Disk Utility, the answer seems to be to try again, several times if necessary. Not only can you encounter this in the Finder, but it can also prevent running First Aid in Disk Utility, which may report that it couldn’t because it was unable to unmount the volume you want checked. Z:\>IMGMOUNT D ~/Documents/IMAGE.Among the rough edges in macOS is that infuriating message you may see when you try to eject or unmount a volume: it failed because the volume is in use. The quotes around pathname can be omitted if CD name has no special characters. Mac OSX Z:\>MOUNT C ~/DOSGAMES Z:\>MOUNT D "/Volumes/Panzer General" -t cdrom The disc label in this example is "DOOM2_V17A". For example, a DOOM II disc shows up as /media/DOOM2_V17A. If you insert a disc in the CD ROM or DVD ROM drive and mount it on your Linux system, or have it set up to auto-mount when the disc is inserted, then use Nautilus to browse to the /media directory, you will see the label of the CD as a folder therein. Note that the Linux path is absolute and case-sensitive. Z:\>MOUNT D /media/CD_LABEL/ -t cdrom -usecd 0 -ioctl Z:\>IMGMOUNT E ~/IMAGES/MYIMAGE.ISO -T ISO Use this command instead, replacing values as appropriate for your system: Open the CD-ROM in Nautilus (or your preferred file manager) to determine its label. This is because CD-ROMs are mounted based on their label and do not share a common mount point. Users of the current version of Ubuntu (9.10 Karmic Koala) may notice that the above command doesn't work. Linux Z:\>MOUNT C ~/DOSGAMES Z:\>MOUNT D /MEDIA/CDROM/ -T CDROM When mounting multiple images (useful for any application which requires discs to be swapped while it is running), you can then switch between the mounted disk-images by pressing Ctrl F4 (by default) while your application is running. Mounting multiple images (ISO or CUE/BIN) Z:\>IMGMOUNT E C:\Images\MyImage1.iso C:\Images\MyImage2.iso -t iso It is also possible to use a cuescheet in combination with an ISO and compressed audio tracks in OGG or MP3 format. The BIN-file has to be in the same folder as the CUE-file. Z:\>IMGMOUNT E C:\Images\MyImage.cue -t iso Since ISO can only contain pure data, the image has to be in the CUE/BIN format. If the game plays additional music tracks from the cd ( mixed mode), you can still mount it as an image file. Mounting an ISO-File as volume Z:\>IMGMOUNT E C:\Images\MyImage.iso -t iso Mounting a CUE/BIN-Pair as volume Z:\>MOUNT D D:\ -t cdrom -usecd 0 -ioctl -label GAME_CD ioctl = Lowest level of hardware access (Win 2K, XP and Linux).follows the -usecd command label = Set the volume name of the drive (all caps) cd = Generate a list of local CD ROM drive's "drive #" values usecd For direct hardware emulation ie: audio playback, etc. Mounting a specific folder from your hard drive Z:\>MOUNT C C:\DOSGAMES Mounting a specific folder and setting the amount of free space for a drive Z:\>MOUNT C C:\DOSGAMES -freesize 1024 Mounting a floppy drive Z:\>MOUNT A A:\ -t floppy Mounting a CD ROM drive Z:\>MOUNT D D:\ -t cdrom Extra CD ROM options -t Define how the mounted folder should behave to the emulated operating system. Usage examples Windows Mounting the working directory from which DOSBox was started Z:\>MOUNT C. 1.1.9 Mounting multiple images (ISO or CUE/BIN).1.1.8 Mounting a CUE/BIN-Pair as volume.1.1.3 Mounting a specific folder and setting the amount of free space for a drive.1.1.2 Mounting a specific folder from your hard drive.1.1.1 Mounting the working directory from which DOSBox was started. ![]()
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