We created 2 Linux RedHat 5 virtual machines on the same ESX 3.5 and installed Oracle 11g RAC.
Boot disk of every machine is in local storage of the ESX server, while shared disks are on a VMFS on SAN (EMC CX3-10).
The shared disks are on dedicated SCSI controller set to "virtual bus sharing".
Installation was ok, and the RAC seems to work, but sometimes a machine reboot unexpectedly.
From the /var/log/messages I see:
Aug 25 06:38:33 ttsc-rac2 kernel: sd 1:0:1:0: reservation conflict
Aug 25 06:38:33 ttsc-rac2 kernel: sd 1:0:1:0: SCSI error: return code = 0x00000018
Aug 25 06:38:33 ttsc-rac2 kernel: end_request: I/O error, dev sdd, sector 81
Aug 25 06:38:33 ttsc-rac2 logger: Oracle clsomon failed with fatal status 12.
Aug 25 06:38:33 ttsc-rac2 logger: Oracle CSSD failure 134.
Aug 25 06:38:33 ttsc-rac2 logger: Oracle CRS failure. Rebooting for cluster integrity.
/dev/sdd is the voting disk.
On Oracle log (/u01/app/crs/11.1.0/crs/log/ttsc-rac1/alertttsc-rac1.log) I see a lot of lines saying that "voting file is offline", but not time related with the error above. After many errors the voting disk returns online.
Any idea?
Thanks,
Stefano