Volume Management
Volume management (not to be confused with SVM described in Chapter 11), with the vold daemon, is the mechanism that manages removable media, such as the CD-ROM and floppy disk drives. I mentioned vold in Chapter 11, when I described USB devices. Mounting and unmounting a file system requires root privileges. How do you let users insert, mount, and unmount CD-ROMs and floppy disks without being the administrator (root)? After a file system has been mounted and you remove the medium, what happens to the mount? Usually when you disconnect a disk drive while it is mounted, the system begins displaying errors and messages. The same thing happens if you remove a floppy disk or CD-ROM while it is mounted.
Volume manager, with its ...
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