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Redhat V4 Update 5 multipath to HP HP XP24000

Redhat V4 Update 5 multipath to HP HP XP24000

Is it possible to use multipath to config the this type of SAN.

If so could the multipath.conf entry be show in a thread...

If not what software could be used to do the config of the SAN
Steven E. Protter
Exalted Contributor

Re: Redhat V4 Update 5 multipath to HP HP XP24000


Red hat has basic non load balancing multipath built in. Part of the standard install set.

Steven E Protter
Owner of ISN Corporation
J Peak
Frequent Advisor

Re: Redhat V4 Update 5 multipath to HP HP XP24000

I've recently been over this issue with an HP instructor during a HP SAN training class.

Multipath will support connecting to your XP. As Steve stated, the "load balancing" is not a true one, it is a round-robin approach of firing packets down the paths sequentially, irregardless of their payload size.

In the multipath.conf file, ensure that you comment out the "blacklist dev node" section near the top of the file.

Then re-sense the fabric:
echo "1" > /sys/class/fc_host/host0/issue_lip
echo "- - -" > /sys/class/scsi_host/host0/scan

After you've detected your devices you can specify what type of access they get ( round robin, etc ) in the multipath.conf file. Examples are included within the file.

Keep in mind, if you have a device in /etc/fstab to be mounted from the fabric at boot time, you'll need the entry in /etc/multipath.conf for it to work. Otherwise, you'll be at the console commenting it out of fstab and continuing the boot.

Hope this helps.