Example -- Creating a Trans Metadevice Using Mirrors

# umount /home1
# metainit d64 -t d30 d12
d64: Trans is setup
(Edit the /etc/vfstab file so that the file system references the trans metadevice)
# mount /home1

Mirror d30 contains a file system mounted on /home1. The mirror to contain the logging device is d12. First, the file system is unmounted. The metainit command with the -t option creates the trans metadevice, d64.

Next, the line in the /etc/vfstab file that mounts the file system must be changed to reference the trans metadevice. For example, the following line:

/dev/md/dsk/d30 /dev/md/rdsk/d30 /home1 ufs 2 yes -

should be changed to:

/dev/md/dsk/d64 /dev/md/rdsk/d64 /home1 ufs 2 yes -

Logging becomes effective for the file system when the file system is remounted.

On subsequent file system remounts or system reboots, instead of checking the file system, fsck(1M) displays a logging message for the metadevice:

# reboot
...
/dev/md/rdsk/d64: is logging