search for: _fence_devices

...erver, with heartbeat managing the fencing. here's a hardware block diagram http://freescruz.com/shared-sas.jpg This is about the only details I've found on scsi persistant reservations and linux HA http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Configuration_Example_-_Fence_Devices/SCSI_Configuration.html One question I have is: how well will this scale with several strings of 100 SAS drives on the same HA pair of servers? Can SAS storage instead be fenced at the SES/expander level rather than having to use reservations with each separate drive? -- john r pierce...