Red Hat Bugzilla – Bug 16709
mount allows a volume to be mounted multiple times
Last modified: 2008-05-01 11:37:58 EDT
Hello, Mount, as part of the mount-2.10m-3 package that was installed with RHL 6.9.5, seems to allow a disk volume to be mounted in multiple places simultaneously, as well as in the same place multiple times. Here is an example: $ mount /dev/sda12 /mnt/1 $ mount /dev/sda12 /mnt/2 $ mount /dev/sda12 /mnt/2 $ df /dev/sda1 101089 43531 52339 46% / /dev/sda11 1517920 40 1440772 1% /home /dev/sda7 101089 19 95851 1% /tmp /dev/sda5 909136 337520 525432 40% /usr /dev/sda6 248895 189912 46133 81% /usr/src /dev/sda8 101089 8515 87355 9% /var /dev/sda10 497829 107 472020 1% /var/log /dev/sda9 101089 25 95845 1% /var/spool /dev/md0 149998376 326752 148170260 1% /mirror /dev/sda12 497829 13 472114 1% /mnt/1 /dev/sda12 497829 13 472114 1% /mnt/2 /dev/sda12 497829 13 472114 1% /mnt/2 I can subsequently umount everything by either doing two 'umount /mnt/2' and one 'umount /mnt/1' or two 'umount /dev/sda12' commands. I have not tested a doubly-mounted partition like this for data corruption. If you need more information, access to this machine, or if I'm smoking too much crack and missed the fact that this is normal behaviour now, let me know. Otherwise, thanks for everything. ...Bob
Do you happen to be running a 2.4 kernel? If so, it's a feature. :)
Good call. I upgraded to 2.4.0-test7-pre6 to gain support for my Promise Ultra100 card, and promptly forgot to mention it. So much for that good bug report. :-) I still think that it's a bit odd to have the same volume mounted in the same spot twice. I can envision the mounts in multiple locations to be a desired thing, though. I will let you guys make the call about setting this to NOTABUG and closing it, in case you want to pursue it. It's just something I noticed, so not a crucial thing here. Thanks again. ...Bob