Swapping Disks in ZFS Pool

[masteryoda]

I have a zfs pool and its getting full (raidz2), I want to swap 2 of the disks with new ones with higher capacity. I've read the instuctions for the swap & resilvering. i have 2 quick questions

1. Can I swap 2 disks simultaneously OR do i do it 1 at a time?
2. WIll there be an issue with useing just 2 disks of higher capacity? I have 7 disks with 1TB and want to replace disk 6 & 7 with 2TB ones

OR

3. destroy the ZFS pool and build a fresh one & restore from backup? (I can afford the weekend downtime)

 

[Dunuin]

1. Can I swap 2 disks simultaneously OR do i do it 1 at a time?

2 would work but be very dangerous. So better one at a time.

2. WIll there be an issue with useing just 2 disks of higher capacity? I have 7 disks with 1TB and want to replace disk 6 & 7 with 2TB ones

No, but you will only able to use 1 of those 2TB unless you replace all those 7 diska with 2TB models.