Telegraf's inputs.smart uses smartctl -n standby by default, which
returns exit(2) for drives in low-power mode and Telegraf records no
data for them. On skydick this caused sdd/sde (drive1, ZKL05VPS...FMAC)
to be silently missing from smart_device metrics — the exact drive
that accumulated 63 grown defects and had sg_format failures during
initial setup.

Setting nocheck=never forces smartctl to wake spun-down drives. In a
ZFS pool with active mirrors, drives shouldn't be spinning down
anyway, so the 30-min wakeup overhead is negligible.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>