You can move a LUN between controllers, but this will result in the DS complaining if a volume is left on its non-preferred controller. The larger the number the lower the priority. If you have 2 controllers and 2 ports per controller, that means you can only have 2 XenServers in pool with direct connect to SAN. In this policy, no load balancing is performed. Link is operational 8 Gbps.
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The secondary never became active. I have no idea what kind of test should be done to verify which host type are most reliable.
See full activity log. Microsoft MPIO use redundant physical path components—adapters, cables, and switches—to create logical “paths” between mjltipath server and the storage device.
Loot at this article, IMHO the best tutorial. The most funny, I don’t know who address question. From your logs, System storage is connected to ibm system x – with fibre cable. No such file or directory.
The only thing I don’t know, what host type should I set for linux with multipath driver. Any idea how to remove the error and use the multipath with only one hba for server?
Multipathing Support in Windows Server 2008
Feed for this multipayh. Joseph Salisbury jsalisbury on You will be able to leave a comment after signing in. ALUA is a priority handler, not a path checker.
Cancel reply You must be logged in to post a comment. Multipath does not work by now We are working on a fix. Home Questions Tags Users Unanswered.
That is why you see active and ghost in output from multipath -ll command, when using device mapper multipath. If one or more of the primary paths become available, DSM will start using them standby paths in their ds34000 of preference. After setting up a new install of The DSM will specify a primary path and a set of multopath paths. For the XenServers, each host must have a connection to each controller.
I not able to collect the posiblity of error. You should try RDAC Comment on this change optional.
Jason Hess: RedHat and IBM DS
See the XenCenter logs for the full details. Core storage components including MPIO. Attached scsi generic sg2 type 0 If not you’ll need to take apart your config, check any assumptions, and acquire the manual to determine it’s opinion on what the multipath.
Peter Petrakis peter-petrakis on That is a great article Alexei, thanks for posting the link! Posted September 12, It will not work for rdac module.