From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ron Leach <ronleach@tesco.net>
Subject: Re: Recovery on new 2TB disk: finish=7248.4min (raid1)
Date: Thu, 27 Apr 2017 20:01:44 +0100
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On 27/04/2017 15:58, Mateusz Korniak wrote:
>
> What is output of
>   iostat -x 30 2 -m
> during recovery ?
>

iostat command is not recognised - it perhaps is not installed; man 
iostat was not recognised either.

What would the command have done?  I may be able to post equivalent 
information - Smartctl is installed and enabled on sdb, the new disk.

Recovery is still going on - I have not wanted to disrupt it in case I 
mess it up.  (Though all the volatile user data is multiply backed up, 
none of the OS or configuration data is so I don't want to risk 
compromising the array contents.)

regards, Ron