On Wed, Apr 29, 2015 at 01:39:34PM +0200, Otto Moerbeek wrote: > On Wed, Apr 29, 2015 at 01:13:28PM +0200, Marko Cupa?? wrote: > > > Hi, > > > > I have a firewall which was originally installed with 5.4 release, and > > it was configured to be resistant to sudden power outages by means of > > mounting / as read only, and /var and /dev partitions as mfs populated > > from /mfs/var and /mfs/dev. Here's fstab: > > > > e3f2007c8606c31a.a / ffs ro 1 1 > > swap /var mfs rw,-P=/mfs/var,-s=32768,nodev,nosuid,noexec 0 0 > > swap /dev mfs rw,-P=/mfs/dev,-s=8192,-i=128,nosuid,noexec 0 0 > > > > Although this is non-critical box on local network, I wanted to keep it > > up to date so yesterday I upgraded it to 5.5 first, and then to 5.6. It > > appears that it no longer mounts / as read only. > > > > mount output shows the following: > > /dev/wd0a on / type ffs (local) > > mfs:15966 on /var type mfs (asynchronous, local, nodev, noexec, nosuid, > > size=32768 512-blocks) > > mfs:29006 on /dev type mfs (asynchronous, local, noexec, nosuid, size=8192 > > 512-blocks) > > > > Trying to remount it as read/write says device busy: > > $ sudo mount -ur / > > mount_ffs: /dev/wd0a on /: Device busy > > > > What could be preventing read-only mount? > > rc mounts / rw explicitly these days, to be able to write a random
Btw, it has been like that since 1997, so you had a modified rc, I presume. > generator seed for the next boot. > > Why you cannot update to r/w I don't know, but fstat -f / might tell > you more. If a file on / is open for r/w, the mount -u wil fail, as > documented. > > -Otto > > > > > Thank you in advance, > > -- > > Marko Cupa?? > > https://www.mimar.rs
