From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wols Lists <antlists@youngman.org.uk>
Subject: Re: Replacing a RAID1 drive that has not failed.
Date: Tue, 27 Oct 2015 21:31:01 +0000
Message-ID: <562FED15.5040804@youngman.org.uk>
References: <n0mbam$gmk$1@ger.gmane.org> <n0o9n3$gmk$2@ger.gmane.org>
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To: Doug Herr <gmane@wombatz.com>, linux-raid@vger.kernel.org
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On 27/10/15 16:45, Doug Herr wrote:
>  1. Partition new drive (plugged in via external SATA dock)
> #fdisk /dev/sdc
> (make it an exact match of sda/sdb unless it turns out to be smaller,
>  in which case I can shrink /boot to make room.)

man gdisk.

Look at the "u" option in the "expert" menu - it'll probably save you
some work :-)

Cheers,
Wol