mount: LABEL=foo duplicate - not mounted

[Michael Schwendt]

The following problem:

  # mount /var/lib/mach
  mount: LABEL=mach duplicate - not mounted

  # mount -L mach /var/lib/mach
  mount: the label mach occurs on both /dev/dm-1 and 
  /dev/mapper/VolGrp01-Volume02 - not mounted

Let's see:

  # e2label /dev/dm-1 
  mach
  # e2label /dev/mapper/VolGrp01-Volume02
  mach

Okay. But why can I mount a different volume with a different label?

  # mount -L ftp /var/ftp/pub
  
  # e2label /dev/dm-0
  ftp
  # e2label /dev/mapper/VolGrp01-Volume01 
  ftp

Why doesn't that give a duplicate label error?

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Fedora Core release 2.92 (FC3 Test 3) - Linux 2.6.8-1.541
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