If my active fiber path becomes unavailable the node restarts automatically

Cluster of 2 nodes on Oracle Linux 6.2

I have a 11.2.0.3 RAC installed to aid vote ASM disks and a disc ASM hosting a cluster database. I'm testing the failover for multipaths. I got disabling a path and check connectivity then reactivate using a Cisco Fabric manager. On some paths - I guess that's the active path, the server restarts almost immediately after you turn off the path (closure of the port). I have 8 paths for each LUN and Multipath - he's shows output such as:

mpathf (26366623936333162) dm-15 WTSSR__B, INVICTA
size = 2.1 features T = '0' hwhandler = '0' wp = rw
| - + - political = "round-robin 0" prio is 1 table = active ".
| ' - 1:0:0:7 homeless ready active 8:80 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 1:0:1:7 DTS ready active 65:16 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 1:0:2:7 hamza ready active 65:208 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 1:0:3:7 sdap ready active 66:144 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 2:0:0:7 FSCO ready active 67:80 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 2:0:1:7 sdbn ready active 68:16 running
| - + - political = "round-robin 0" prio is 1 table = on ".
| ' - 2:0:2:7 sdbz ready active 68:208 running
' - + - political = "round-robin 0" prio is 1 table = on ".
' - 2:0:3:7 sdcl ready active 69:144 running

When I created the asm disks, I fell: oracleasm createdisk BIGDISK/dev/dm-15
I don't know if that's a problem, but the database works well as it is the cluster.

Another thing - it starts from SAN and when I installed it found the multipath device and installed very well to the LUN (two nodes). I had to edit the /etc/multipath.conf and comment options the blacklist before multipath - he's would show all paths. However I do nothing else with this file. I noticed in some of my reading that maybe I should have a wwid followed by a unique iSCSI identifier in the file multipath.conf, but since multipath - he's showing all of these paths I didn't manually multichannel updates in the config file.

I am not mistaken, no sure what if I have something misconfigured as the multipath.conf information is needed more path, or if there is a configuration setting to prevent reboot nodes too quickly if a path is removed?

Published by: GeorgeHorlacher on February 5, 2013 15:59

ASMLib, if you use it, cannot manage to see the same disk twice. You may need to exclude scanning ASM order devices to make sure to use the multipath device and not the real disk.

Setting up Oracle ASMLib on multichannel discs
www.Oracle.com/technetwork/topics/Linux/Multipath-097959.html

Regardless of ASMLib, if you have separate disks on separate controller trails, you can check for each path of the controller in a separate group of ASM failure and does not implement different controller failure groups who use paths.

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