Expand to 4 disks?

[spooknik]

Hello! I stumbled on your scripts and post here and I'm just wondering if this is expandable to work with 4 disks instead of 2?

I'm following the guide in the post, but during the install command you are setting up the server with raid 1. I'm a little confused at this step because I thought there must not be any pre-existing raid setups when using ZFS.

Thanks for the help!

[tijszwinkels]

Hi @spooknik

I changed the scripts to deploy to a 4-disk system in raid-z (this means that 1 disk out of 4 can fail). I haven't actually tested these scripts, so exercise caution.

The script is in the '4diskraidz' branch. (https://github.com/tijszwinkels/hetzner-ubuntu-16.04-zfs-root-ansible/tree/4diskraidz)

[tijszwinkels]

To answer your question about raid 1. I'm using the following method:

• Create a raid1 on the first 4G of the disk (can be done with 4 disks as well)
• Install linux with the Hetzner installimage script.
• Create a ZFS partition on the rest of the disk, copy linux there, boot from that partition.

So, after these steps, there is still a little raid-1 partition left at the beginning of the disk. These partitions can be removed & repurposed as swap-space.