How to make RHEL have persistent local hdd name?

Posted by Mxx on Server Fault See other posts from Server Fault or by Mxx
Published on 2013-06-27T19:16:38Z Indexed on 2013/06/27 22:23 UTC
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Filed under:

hard-drive

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Oracle

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rhel6

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udev

I have 2 identical Dell R720 servers running identical Oracle Enterprise Linux(RHEL)6.4.

Both servers (supposedly) configured in exactly the same way. However, one of the servers is behaving differently.

Every other reboot its local HDD name(and related partitions) flip from /dev/sda to /dev/sdj. This is problematic because both servers are configured for multipathd, and if this flip happens their config does not match and Oracle DB(or its clusterware) complains that nodes are not configured identically.

Why does one server has a consistent device names while the other server keeps flipping back and forth?

How can I make local hdd to consistently be /dev/sda? I suspect this might have something to do with udev but I'm not sure.

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