On Sat, 6 Aug 2011, Alexander Lesle wrote:
Those using mirrors or raidz1 are best advised to perform periodic
scrubs. This helps avoid future media read errors and also helps
flush out failing hardware.
And what is your suggestion for scrubbing a mirror pool?
Once per month, every 2 weeks, every week.
I think that this depends on the type of hardware you have, how much
new data is written over a period of time, the typical I/O load on the
server (i.e. does scrubbing impact usability?), and how critical the
data is to you. Even power consumption and air conditioning can be a
factor since scrubbing is an intensive operation which will increase
power consumption.
Written data which has not been scrubbed at least once becomes subject
to the possibility that it was not written correctly in the first
place.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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