Hi,

 Most of the time while waiting on a disk to fail is spent in disk drivers and 
not ZFS itself. If you want to lower the timeouts than you can do so by 
configuring different timeouts for sd. ssd or any other driver you are using.

See http://wikis.sun.com/display/StorageDev/Retry-Reset+Parameters

So if you are using sd driver it will try sd_io_time * sd_retry_count times 
where by default sd_io_time is 60s and sd_retry_count is 5 or 3 depending on 
device type (fc or not) IIRC. Try to lower the timeout or number of retries or 
both.

-- 
Robert Milkowski
http://milek.blogspot.com
-- 
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