[Gllug] Remounting Solaris disks readonly

[Tethys]

Anyone know how I can remount a disk read only under Solaris without
any downtime? Under Linux I'd just do:

	remount -oremount,ro /usr

Under Solaris, however, the remount option only goes one way -- from
ro to rw. So the only way I can see to do it is to umount the filesystem
and then remount it. And you can't umount it while it's still in use,
which for /usr pretty much guarantees the only way to change it is with
a reboot :-(

Tet

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