can i run hp_rescan or probe-luns in production??

[iinfi1]

hi

i need to add a LUN to my existing production server which is running oracle BI and test servers.
when the LUN is shown to the SLES 10 SP1 (x86_64) server from the eva440
can i run /opt/hp/hp_fibreutils/probe-luns as root user without affecting the existing applications?

[Ivan Ferreira]

Yes you can. But sometimes, Linux is not capable to recognize the LUN and a reboot is needed.

[iinfi1]

thank you ...
how do i run the command?
server1:# /opt/hp/hp_fibreutils/probe-luns

are there any changes to be made in any file? are there any parameters to probe-luns?

[Ivan Ferreira]

In fact, you need to run hp_rescan -a. probe-luns is run during startup.

[iinfi1]

can you please let me know if running hp_rescan will affect existing mountpoints. can i run it without affecting the running application.
hp_rescan -a

where sud the
probe-luns
command be placed? in the boot.local?
what are the parameters. i am unable to find any good docs on the same.
can u plz help me with that too?

[Jan Soska]

Hello,
check this page http://www.garloff.de/kurt/linux/ and try Rescan SCSI bus script, I think it worked in our case (RH + Eva6000) but not sure. Let us know.

Jan

[Ivan Ferreira]

Yes, you can run without affecting existing mount points.

If you need more information, check this product guide:

http://h10032.www1.hp.com/ctg/Manual/c00169487.pdf

[iinfi1]

thank you all...
will go thru the guide!

[Alan_152]

I've never had a problem with it. In fact, one of my pre-certification tests for large ssytems is to run it in a loop for an hour.

[iinfi1]

i will get a chance to do this on sunday or early nxt week ... stor admin went missing tdy ...
btw once i run
hp_rescan -a
will i need to do more for multipathing? my server has two FC cards?