Hi,
You can try to add it to bootparams.addkcmdline by tabedit bootparams
or chdef <nodenames> addkcmdline="rdloaddriver=scsi_dh_rdac"
Hope it helps,
Ling
Ling Gao
Poughkeepsie Unix Development Lab
IBM Systems and Technology Group
Internal: T/L 293-5692
External: ling...@us.ibm.com, 845-433-5692
"I never worry about the future. It comes soon enough." --- Albert
Einstein
From: viviano.b...@epamail.epa.gov
To: xcat-user@lists.sourceforge.net
Date: 12/07/2012 12:16 PM
Subject: [xcat-user] Adding kernel parameters to stateless images.
Good morning,
I've searched Google and the xCAT WIKI and just couldn't find the
answer. If I missed the FAQ, sorry. I have an iDataplex cluster with
GPFS and xCAT 2.7.6 (yum install) on RHEL 6.3. The GPFS nodes are
stateless attached to a DS3500. We're having the RDAC / FC timing issues
detailed in this Redhat Knowledge article:
https://access.redhat.com/knowledge/solutions/18746
I've found a work around, which is to add "rdloaddriver=scsi_dh_rdac" to
the kernel boot line. I've tested it by editing the boot file in
/tftpboot/xcat/xnba/nodes for one of the GPFS nodes and adding
rdloaddriver to "imgargs kernel" and rebooting. My boot time went from >7
minutes after POST to < 30 seconds, with no errors on the ghost paths.
But, I can't find which tabch/tabedit settings I need to use to adjust to
make it permanent. Editing bootparms and running nodeset didn't work. How
do I permanently add a value to "kcmdline" for a stateless node, without
breaking what is already set there.
Thanks,
-Brad Viviano
===================================================
Brad Viviano
High Performance Computing & Scientific Visualization
Lockheed Martin, Supporting the EPA
Research Triangle Park, NC
919-541-2696
HSCSS Task Order Lead - Ravi Nair
919-541-5467 - nair.r...@epa.gov
High Performance Computing Subtask Lead - Durward Jones
919-541-5043 - jones.durw...@epa.gov
Environmental Modeling and Visualization Lead - Heidi Paulsen
919-541-1834 - paulsen.he...@epa.gov
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