zfs hang in zio->io_cv) with dd read

[Andriy Gapon]

on 07/10/2010 20:31 John Hay said the following:
> Oct  7 17:11:49 thumper1 kernel: mvsch23: EMPTY CRPB 30 (->0) 0 4000

Can you rule out hardware (or driver-level) problems?
E.g. by dd-ing to/from disk directly.
Doing that in parallel on the same and/or different disks.
Running any disk I/O benchmarks.

-- 
Andriy Gapon