How to add a hot spare to a GEOM Raid 1

[Patrick M. Hausen]

The system won't crash when one of the drives fails ;-)

[justmehereinBrisbane]

Hi Patrick

Well in that case - lets mirror the swap drive.

Thanking you for all your help so far! :)

[Patrick M. Hausen]

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swapinfo
Device          1K-blocks     Used    Avail Capacity
/dev/ada0p3       8388608        0  8388608     0%
/dev/ada1p3       8388608        0  8388608     0%
/dev/md98         2097152        0  2097152     0%
Total            18874368        0 18874368     0%


First remove that swap file. It hurts more than it helps since you have "real" swap partitions.

Go to System > Settings > Miscellaneous and remove that check mark from "Add a 2 GB swap file to the system".

Then on a root shell:

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swapoff -a
Edit the file /etc/fstab and remove these two lines:

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/dev/ada0p3        none        swap    sw        0    0
/dev/ada1p3        none        swap    sw        0    0

Replace them with this one instead:

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/dev/mirror/swap        none        swap    sw        0    0
Then these commands:

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gmirror label -b round-robin swap ada0p3
gmirror configure -a swap
gmirror insert swap ada1p3
gmirror status
swapon -a
swapinfo
That should do it.