Weird I/O hangs (9.1R, arcsas, interrupt spikes on uhci0)

[Dennis Kögel]

Am 19.06.2013 um 16:47 schrieb Steven Hartland:
> I'm not familar with that model of the areca but have you tried
> with the standard OS driver or does it not support that card?

The ARC1320 (non-raid) unfortunately isn't supported by the in-tree driver.

> Also when you see hangs can you access the disk directly or not
> e.g. dd if=/dev/da0 of=/dev/null bs=1m count=10 ?

Interesting idea. The dd then hangs right until everything else resumes as well.

^T during hang says: load: 12.39  cmd: dd 7847 [physrd] 6.36r 0.00u 0.00s 0% 1632k