Expanding a ZFS zpool

[IPfreely]

I currently have a 10TB (8 TB usable) zpool setup in the below config.

       NAME             STATE     READ WRITE CKSUM
        storage          ONLINE       0     0     0
          raidz1         ONLINE       0     0     0
            disk1        ONLINE       0     0     0
            disk2  	 ONLINE       0     0     0
            disk3  	 ONLINE       0     0     0
            disk4 	 ONLINE       0     0     0
            disk5 	 ONLINE       0     0     0
          raidz1         ONLINE       0     0     0
            disk6        ONLINE       0     0     0
            disk7        ONLINE       0     0     0
            disk8        ONLINE       0     0     0
            disk9        ONLINE       0     0     0
            disk10       ONLINE       0     0     0

As you can see the zpool consists of 2 x 5TB vdevs. Each vdev consists of 5 x 1TB drives in raidz.

This pool is now 95% full and is in urgent need of an upgrade.

I was thinking of getting 4x 3TB drives and adding these as a 3rd vdev. Will this work or do I need to expand using 5 drives since my other vdevs consist of 5 drives?

[Stanza]

Why don't you get 5 x2tb or 3tb drives and replace - expand one vdev.

Then flog off the 5 x 1tb drives to recoup some cost?

.

[Jim G]

I'll +1 Stanza's suggestion - 1TB drives won't be worth even what they are now a year from now so you might as well move them on while they're still worth something and upgrade one of your existing pools one drive at a time then expand that vdev.

That also reduces your power bill - 5 less drives to achieve the same capacity is never a bad thing as far as that goes.

[IPfreely]

Good idea. I think I'll go with that suggestion.