From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ronal Andadinata <randadinata@gmail.com>
Subject: mdadm, bitmap and split-brain
Date: Sun, 27 Nov 2011 03:28:31 +0700
Message-ID: <4ED14BEF.2060301@gmail.com>
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Hi,

I'm wondering, in the case of raid1 array with internal bitmap, it goes 
like this :
1. Machine A has 1 raid1 array with Disk1 dan Disk2
2. Dettach Disk2 from Machine A, put it on Machine B
3. Machine A runs normally, Machine B runs on normally on different place.
4. Detach Disk2 from Machine B, put it back on Machine A, re-add Disk2 
to md1

If this were raid1 without bitmap, Disk2 will be overwritten from 
scratch with contents of Disk1, what happen if the array has bitmap ? 
Would there be partial sync ? Would the two disk be identical with only 
using partial sync ?