Problem setting up shared disk

I'm having problems setting up shared disk for clustering

My configuration is:

Host OS: CentOS 2.6.18-53.1.14.el5

vmware server 1.0.4 build-56528

When I add scsi1.sharedBus = "virtual" , the virtual machine won't start.

When scsi1.sharedBus = "virtual" is removed, only one VM starts. The second VM hangs after a little while and the whole system becomes very very slow and i have to power off and reboot.

Replacing scsi1.sharedBus = "virtual" with, for each disk, scsi1:0.shared = "true" has the same effect.

What am I missing?

Here is vmx config file for both VM

disk.locking = "FALSE"

diskLib.dataCacheMaxSize = "0"

diskLib.dataCacheMaxReadAheadSize = "0"

diskLib.dataCacheMinReadAheadSize = "0"

diskLib.dataCachePageSize = "4096"

diskLib.maxUnsyncedWrites = "0"

scsi1.present = "TRUE"

scsi1.virtualDev = "lsilogic"

• not working **********

scsi1.sharedbus = "virtual"

***************************

scsi1:1.present = "TRUE"

scsi1:1.fileName = "/u01/VM/shared/ocr.vmdk"

scsi1:1.mode = "independent-persistent"

scsi1:1.deviceType = "disk"

scsi1:1.redo = ""

scsi1:1.writeThrough = "TRUE"

...

scsi1:2 ...