Add drives to raidz

[technogroup]

Hey everyone,

I am out of space in my current system and need to figure out a way to add drives to a raidz pool. The scenario is as follows. I filled a 2TB drive and am going to purchase 4 more 2TB drives. I want to get some parity in case of drive failure so it was either Raid5 or raidz. The issue I am having is I cant find a clear answer to how to if possible create the pool/array with the 4 drives and then add my remaining drive with that data to it. I was also thinking of creating the pool/array with the drives and then copy the data over to it then add the now empty drive to the pool. I just cant find any answer on how its done or even it is possible.

The only options I think I have are as follows:
1. Transfer all data on existing drive to another location, add all 5 2TB drives as a single raid set at once then transfer back the data from other location
2. Create raid set with new drives, add another set with single drive to add to existing pool that contains other set of 4 drives. (not sure if this will add redundancy though)

If I went with option 1 and wanted to add more drives in the future I would have to use a modified version of option 2.

Im just not sure how ZFS deals with data for redundancy when having separate raid sets in a single pool.

Thanks for the help.

[raulfg3]

you can create a RaidZ1 of 5 disk but withot 5º Disk ( Faulting pool), copy your data to this new pool of 4 disk), and add the 5 disk to rebuil the pool .


PD: It's possible but not recomended because if somethings goes wrong you lose your data, so your option 1 is the best that I think.

[technogroup]

How would I make the faulting pool with the 5 disks if I went that route? Im not sure if I can obtain 2TB of temporary storage.