Can't get raidz option in virtual box

[Steve Holt]

Hi, new to freenas. I'm trying to evaluate it before I start to invest. I have it running in virtualbox with 4 20GB SATA drives. I have 5GB of ram dedicated to it. I'd like to create a new raidz2 volume, but the only options i'm getting are stripe and mirror (other than log, cache, etc...). I'm assuming its a limitation of running it in virtualbox and/or memory/disk combination. I can adjust it to anything if its possible as i'm just using this as a lab, but I'm not sure what I need to adjust it too. "raidz virtualbox" search didn't return any results.
Thanks in advance.

UPDATE: I saw raidz2 required 4 disks so i thought thats all i needed. however i just added a 5th disk, now i have all the raidz options. I'm not entirely sure why i need 5. A clarification on that would be nice. I'll look at the docs in the meantime.

 

[dlavigne]

Keep in mind that one of the virtual disks holds the OS, so yes, five virtual disks are needed in order to get four storage disks.

 

[Steve Holt]

yes, i should have specified, i had an OS disk and 4 storage disks, still I had no raidz options until i added the 5th storage disk.