Thanks for the info. For 1.5 TB I'd just use an extra drive. My 20 TB is 11 x 3 TB used SAS drives in a raidz3 config. You can pickup a 3 TB drive off eBay for

Thanks for the info. For 1.5 TB I'd just use an extra drive. My 20 TB is 11 x 3 TB used SAS drives in a raidz3 config. You can pickup a 3 TB drive off eBay for $18-$24. I should've probably just bought four 10 TB WD red drives, but building this system has been, uh, a passion project I guess. :-) It's still cheaper than if I'd bought new red drives, but I haven't factored in the electricity cost of running 11 SAS drives vs four red drives... the breakeven is probably less than a year. :-(