Having used and despised VxVM on Solaris before, and finding out about Heartbeat since then, I'd look into attached enclosures shared physically on a SCSI bus (there is an article in SysAdmin magazine that I used for my starting point) and serial heartbeats across the nodes, if the cluster is simple enough... if not post to the linux-HA list :-) Quoth Frank Lenaerts: > I've been reading several LVM/RAID postings on this mailinglist to > find out if someone else is also having the same question as I have, > but this does not seem to be the case; I hope this is the right place > to ask this. > > As LVM does not provide RAID1 (etc.) as VXVM does with its plexes, I > wanted to use LVM on top of the standard Linux metadevices > (RAID1). However, I wanted to do this for a cluster system using a > shared SCSI bus. I am aware of the fact that ownership of disks is > important, while something like LVM actually tries to abstract this > away, but I want to use LVM to be able to extend the filesystem, to > take snapshot backups etc.. The problem I currently face however, is > the fact that both nodes autodetect the metadevices and start syncing > the mirrors, independently of each other (I do not have the LVM and > cluster software installed on these machines yet). The synchronization > however, is initiated by the raidstart command, that is true (it is > not the detection itself which does this), but I wonder how I should > solve this problem. Below, some ideas that come to my mind: > > - do not use LVM at all, just use the physical disks instead > > - have two separate raidtab files where each of them is only "owned" > by a single node (to prevent syncing problems) and only start the > raid for a certain metadevice when a logical volume is imported on a > node > > What do you think about this? > > -- > frank.lenaerts@advalvas.be -- "To be suspended from the legal profession is the moral equivalent of being ostracized by child molesters." --Ian Rowan _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html