Bernie, First, use CSE (XLINK part) on the VM level, so that VM handles linking (and locking) across the lpars. When the disk is used read-only on all Linux guests, you can just let all the guests link it read only (use link mode "R") and do the same as you're doning on a single z/VM system. If you want to write to it to, then you should, just like with the single z/VM system make sure that only one Linux guests writes, and that NO other Linux guests can access the disk at the same time (link mode "W"). Or, you can use on SLES 10 SP2 the OCFS2 filesystem to make the disk shared write across the Linux systems (link mode "MW"). Note however, that you do not have Posix locking on OCFS2 with SLES 10 yet, but if you migrate to SLES 11, you can choose between GFS and OCFS2 and get Posix locking, so that for instance the HA functionality of MQSeries 7.0.1 can be used with Linux.
Ronald van der Laan ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
