What is the best way to create RAID 1?

Posted by user3125731 on Super User See other posts from Super User or by user3125731
Published on 2014-08-21T09:39:11Z Indexed on 2014/08/21 10:23 UTC
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I'm looking for a way to create the RAID 1 array without losing my data on CentOS. Here's my situation: I've got a web server running on CentOS. There is one VG partition with few LV volumes. I bought a second HDD (the same model and size as the first one) and I want to create the RAID 1 configuration. I can't just shut down this server for more than an hour because my clients will be disappointed. I need to do this as quickly as possible with minimal risk of data loss.

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