Adding redundant drive to existing installation?

[Hisma]

Hi guys

I have an existing freenas system with 3 drives -
1 3TB drive
2 1TB drives in RAID1

They are all linked together in a zfs pool.

What I want to know is how much trouble would it be to add a second redundant 3TB drive to my system without disturbing the pool. I want redundancy for the 3TB drive as well.

How would I go about this? Any guides out there? Any tips?

Thanks!

 

[dziring]

This is an old post, but seems applicable:
http://forums.freenas.org/threads/add-drive-as-hot-spare.3183/

 

[Dusan]

You can do this in CLI. What you are looking for is zpool attach (http://www.freebsd.org/cgi/man.cgi?query=zpool):

zpool attach pool device new_device

Attaches new_device to an existing zpool device. The existing device
cannot be part of a raidz configuration. If device is not currently
part of a mirrored configuration, device automatically transforms
into a two-way mirror of device and new_device. If device is part of
a two-way mirror, attaching new_device creates a three-way mirror,
and so on. In either case, new_device begins to resilver immediately.

You may also want to partition the disk first and create a swap partition. See here for more details: forums.freenas.org/threads/create-zfs-mirror-by-adding-a-drive.14880/

 

[Hisma]

You can do this in CLI. What you are looking for is zpool attach (http://www.freebsd.org/cgi/man.cgi?query=zpool):

You may also want to partition the disk first and create a swap partition. See here for more details: forums.freenas.org/threads/create-zfs-mirror-by-adding-a-drive.14880/

thank you! I just got the drive today, so I will try this soon and report back if I have any problems.