[OpenIndiana-discuss] Fwd: zpool really slow

[Jim Klimov]

In the posted output, c8t50014EE6561DDB4Cd0 consistently has large
service times and percent-busy, while its other values are on par
with those of other drives (KBs and IOs read/written). This may
mean problems with the device (broken, overheated, vibrated) or
its connection (cable, sockets, HBA chip). At the very least, try
to unplug and re-plug all the involved connections to clean them.

See in FMA (i.e. "fmdump") or plain "dmesg" (/var/adm/messages*)
if there are reports of it being broken or otherwise already
suspected by the system? Possibly, "iostat -En" would show a
non-zero counter as well?

HTH,
//Jim