====== FreeBSD: gmirror & gstripe ======
\\

===== gmirror =====

add this line to /boot/loader.conf
<file - /boot/loader.conf>
geom_mirror_load="YES"
</file>

modify kern.geom.debugflags sysctl variable
<file bash>
sysctl kern.geom.debugflags=16
</file>

create the mirror with the first drive ad6
<file bash>
kldload geom_mirror
gmirror label -v -b round-robin gm0 /dev/ad6
</file>

edit /etc/fstab
<file>
# Device                Mountpoint      FStype  Options         Dump    Pass#
# /dev/ad6s1b   none            swap    sw              0       0
# /dev/ad6s1a   /               ufs     rw,noatime      1       1
/dev/mirror/gm0s1b      none            swap    sw              0       0
/dev/mirror/gm0s1a      /               ufs     rw,noatime      1       1
</file>

reboot, then add a second drive ad4
<file bash>
gmirror insert gm0 /dev/ad4

gmirror status
      Name    Status  Components
mirror/gm0  DEGRADED  ad6 (ACTIVE)
                      ad4 (SYNCHRONIZING, 17%)
</file>

\\
\\ ===== gstripe =====

add this line to /boot/loader.conf
<file - /boot/loader.conf>
geom_stripe_load="YES"
</file>

make the stripe array
<file bash>
gstripe label -v st0 /dev/ad2 /dev/ad3
</file>

IF this is a boot volume add
<file bash>
fdisk -vBI /dev/stripe/st0
</file>

make a partition table
<file bash>
bsdlabel -wB /dev/stripe/st0
newfs -U /dev/stripe/st0a
</file>

edit fstab adding a line like this
<file - /etc/fstab>
/dev/stripe/st0a /mnt ufs rw 2 2
</file>


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