From: Tomasz Chmielewski <mangoo@wpkg.org>
To: linux-raid@vger.kernel.org
Subject: creating RAID-1 - in which direction will the sync be made?
Date: Wed, 14 Jul 2010 12:04:23 +0200 [thread overview]
Message-ID: <4C3D8BA7.2020500@wpkg.org> (raw)
In which direction will the devices be synchronized, if I create a new RAID-1 array with an external bitmap?
Assuming I use this command line:
mdadm --create /dev/md11 --level=1 --bitmap=/mnt/src/bitmap --raid-devices 2 /dev/storage/origin /dev/esata/copy
Should I expect /dev/storage/origin being written to /dev/esata/copy?
Or perhaps, /dev/esata/copy will be written onto /dev/storage/origin?
I couldn't find it explained in the fine manual, so perhaps creating an array with a missing device:
mdadm --create /dev/md11 --level=1 --bitmap=/mnt/src/bitmap --raid-devices 2 /dev/storage/origin missing
and adding a second device later will be safer...
--
Tomasz Chmielewski
http://wpkg.org
next reply other threads:[~2010-07-14 10:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 10:04 Tomasz Chmielewski [this message]
2010-07-14 13:48 ` creating RAID-1 - in which direction will the sync be made? Tomasz Chmielewski
2010-07-15 5:40 ` Neil Brown
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