![]() ![]() Windows will never automatically assign A: & B: but these are still valid drive letters and can be used for permanentlymounted volumes. Also recommended is to assign reserved volumes from the end of the alphabet (Z:, Y:, X:, etc) As these are unlikely to get assigned during the discovery boot process. This works until the boot process assigned a found unassigned volume to a reserved drive letter before the reserved volume is mounted. Microsoft kludged the reserved drive letter to a named volume to which is what we recommend here to keep LR from losing its place. It was at this point when the weakness of the drive letter system became apparent. That meant that Drive D: became the installed optical drive and thumb drives and card media were assigned when inserted. Subsequent volumes discovered on boot were assigned drive letters in the order they are discovered. When permanent disks were installed the first found drive letter was Assigned to C: and A: & B: were ignored. ![]() Originally DOS Drives A: & B: were reserved for removable media (floppy). Every other operating system (MacOS, UNIX, Linux, SunOS, AIX) uses volume names. Click to expand.FWIW, Microsoft Windows is the only operating system that uses and assigns drive letters to disk volumes. ![]()
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