So I have a number of Xen Dom0 hosts that are all connected to a fibre channel fabric. Some of my DomU machines employ software RAID across two physical LUNs brought in from the fibre channel arrays. The reason I do this is to get a bit more redundancy. Should the power fail on one chassis or the cable gets damaged, the VMs can still function. Anyway the problem is that when the Dom0 host boots up, it sees all the volumes on the fabric (right now some 20 scsi devices in /dev) and then proceeds to scan and assemble all the RAIDs it finds. This is exactly what I don't want to happen as having the Dom0 assemble the RAID and then booting the DomU which will also assemble same RAID will be very bad indeed.
I've heard that you can label the superblocks on the RAID members with hostname so they won't auto-assemble except on their proper host. But the RAIDs were created by the RHEL installer and I have no idea if they were labeled or not. I can't find any information on this other than vague references. The man page of mdadm isn't of any help here as well. Does anyone know more about this or can give me ideas? thanks. Michael _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
