Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I don’t know if this is a drbd or a xen issue so I will post this on both lists. I have 2 HP Proliant servers with SLES10 SP2 installed. There are 8 disks on the system, 2 of the disks are in a hardware raid1 and the rest is raid5, also hardware. The servers have several network cards; one is exclusively for drbd replication. I use the drbd 0.7.22-42 that ships with SLES10 and kernel 2.6.16.60-0.23-xen. The Xen host is installed on a non-lvm2 partition of 20 GB on the raid1. The rest of the raid1 are a volume group called system. I have several logical volumes on the volume group system, called mail-root, mail-swap, webmail-root, webmail-swap, etc. The *-root lvs are to be the drbd devices where the domUs systems are going to be installed. The *-swap are just for swap which I don’t want to replicate. I have tested the setup without the domUs running but with mounted drbd devices and pulled the network cable that manages the replication. Everything works as it should; both servers continue working and replication starts as soon as I connect the cable again. I have tested to install the domUs on file systems on the drbd devices, i.e. with the drbd devices mounted and it also works as it should. But when I install the domUs on physical devices /dev/drbdx for the domUs and pull the network cable between the replicating nics the Xen host with the domUs running hangs. Only a cold boot gets it started again. The replication works as it should as long as the cable is there or as long as both servers are up, everything gets replicated through the dedicated nic. But if I reboot the passive server the active server hangs, i.e. the same situation as when I pull the network cable. I have all the domUs on one of the servers, the other server is just passive. I haven't installed heart beat to avoid adding complexity to the situation. Can somebody help me figure out why it I can’t get it to work when the domUs are installed on physical devices? Regards Gabriele -- Gabriele Kalus IT-Manager Lund University, Physics Department