tmpmfs="YES" and going from single user to multi user mode

Oliver Fromme olli at
Tue Dec 19 04:44:55 PST 2006

Trond Endrestøl wrote:
 > After going to single user mode and back to multi user mode on a 
 > system with tmpmfs="YES" in /etc/rc.conf, I wound up with these 
 > filesystems:
 > trond at enterprise:~>df
 > Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
 > /dev/ad0s1a   9195750 3179348 5280742    38%    /
 > devfs               1       1       0   100%    /dev
 > /dev/md0        63214      14   58144     0%    /tmp
 > procfs              4       4       0   100%    /proc
 > /dev/md1        63214      20   58138     0%    /tmp
 > There should either be a shutdown script that unmounts /tmp when 
 > tmpmfs="YES" and /tmp is indeed mounted as a MFS, or the startup 
 > script should check to see if /tmp is already mounted (as a MFS) 
 > before attempting mount the MFS (again).

That problem doesn't occur when you mount /tmp via /etc/fstab
instead of tmpfs="YES" in /etc/rc.conf.  I always prefer to
use /etc/fstab for the above reason and others.  And entry
like the following will do (for a 64 MB /tmp):

md    /tmp    mfs    rw,nosuid,async,-s64m    0    0

Best regards

Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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