<p dir="ltr">Software raid will do the job best. You'll need some scripting to support dropping a drive then re-adding it on both machines.</p>
<p dir="ltr">That said, cron and rsync will do excellent as well. Script up a tool that keeps the mobile drive unmounted except during the sync. That way the sync won't run and dump into a mount point when the drive is in the other machine.</p>
<div class="gmail_quote">On Feb 14, 2015 8:29 AM, "Alex Carver" <<a href="mailto:agcarver%2Bale@acarver.net">agcarver+ale@acarver.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Got an unusual question from someone at work. He wants to set up a pair<br>
of drives to store test data which is usually of significant volume<br>
(several tens of GBs per test).<br>
<br>
He doesn't want to use RAID so that any single drive can be plugged into<br>
any other computer to mount and recover the data directly.<br>
<br>
The first thought was just a daily cron job rsyncing the two drives but<br>
I wanted to ask if there was some kind of solution that faked a mirrored<br>
RAID onto two drives where each drive is just a standard<br>
partition/volume set (i.e. it's composed only of ext2/3/4 partitions and<br>
not a RAID partition/volume)?<br>
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