On Sat, 2009-07-04 at 18:27 -0400, Win Htin wrote: > Hi Tom, > > Thanks a lot for your response. I also have Blade Servers running > RHEL5.2 booting off SAN. > > My follow up question is, can I re-configure/modify an already > installed server? I installed the dynamic multipath RPM as per > RedHat's online instructions but when I run mpath -v2, nothing pops > up. If I run "fdisk -l" I can see the same single disk as /dev/sda, > sdb, sdc and sdd, as expected.
I suspect this will be a little more difficult. Multipath generally won't build a mpath device if one of the devices were already in use/mounted. I suspect you could do something by booting from the CD into rescue mode with the same "mpath" command line option you would use during install, but I've never done it. I also wonder if you could doing it by running an "Upgrade" but using the "mpath" command during the upgrade but once again, it's not something I've ever tried. BTW, did you edit the multipath.conf file and remove the default blacklist (which I think still blacklists all devices by default)? If you know about multipath it wouldn't be that difficult to hack up your initrd the same way that mkinitrd does, that's pretty much what I used to do with RHEL4 with a custom script, but I'm not sure how familiar you are with the specific details of how multipath functions. If someone else knows of an easy way to do it that would be great. Later, Tom _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
