Disk Wait Pegged for One Disk in a 6 Disk VDEV

NAScent

Cadet
Joined
Jul 19, 2017
Messages
6
I have a new, fresh out of burn in, mixed array of 6x3TB drives running raidz2 with 3 Seagate Barracudas & 3 Toshibas.

When doing a local copy between filesystems the Disk Wait Report graph shows the Seagates averaging 20% with two of the Toshibas a little higher. However, the first Toshiba in the array, ada3, averages 80% with frequent bursts pegged at 100%.

Is this normal?
Should I do anything about it?

SMART shows no problems for any of the drives. The only notifications or warnings I get are for my NVMe boot drive exceeding my 42C Critical limit. It's set there for the HDs, but the NVME spikes to 61C a few times a day. If there's a way to set a separate limit for It since it should be safe up into the 70s, I'd be interested.
 
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