Redhat V4 Update 5 multipath to HP HP XP24000

Jon Gomersall — Thu, 14 Feb 2008 15:10:00 GMT

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

Re: Redhat V4 Update 5 multipath to HP HP XP24000

Steven E. Protter — Thu, 14 Feb 2008 23:39:38 GMT

Shalom,

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

SEP

Re: Redhat V4 Update 5 multipath to HP HP XP24000

J Peak — Wed, 05 Mar 2008 13:35:00 GMT

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.

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Redhat V4 Update 5 multipath to HP HP XP24000

Re: Redhat V4 Update 5 multipath to HP HP XP24000

Re: Redhat V4 Update 5 multipath to HP HP XP24000