Ken Hall wrote on 06/05/2007 12:45:52 PM: <snip> > > To share tape drives between zLinux instances for TSM server, NPIV is > required. >
You can share tape drives between zLinux instances, but not on the same path for a given drive unless you have NPIV. I do not, so I configured two FCP channels for use by my two TSM servers as follows: FCP 4C00 ATTACHED TO TSMSERV1 0C90 CHPID D0 FCP 4D00 ATTACHED TO TSMSERV2 0C90 CHPID D1 FCP 4C01 ATTACHED TO TSMSERV2 0C91 CHPID D0 FCP 4D01 ATTACHED TO TSMSERV1 0C91 CHPID D1 FCP 4C02 ATTACHED TO TSMSERV1 0C92 CHPID D0 FCP 4D02 ATTACHED TO TSMSERV2 0C92 CHPID D1 FCP 4C03 ATTACHED TO TSMSERV2 0C93 CHPID D0 FCP 4D03 ATTACHED TO TSMSERV1 0C93 CHPID D1 FCP 4C04 ATTACHED TO TSMSERV1 0C94 CHPID D0 FCP 4D04 ATTACHED TO TSMSERV2 0C94 CHPID D1 FCP 4C05 ATTACHED TO TSMSERV2 0C95 CHPID D0 FCP 4D05 ATTACHED TO TSMSERV1 0C95 CHPID D1 Virtual address 0C90 above represents the same physical drive on each server. I could have allocated all TSMSERV1's drives on one FCP CHPid and all TSMSERV2's drives on the other but chose to alternate them primarily for availability (in case a CHPid died) but also for load balancing. Without NPIV, I could add a third TSM server, but I'd have to add a third FCP CHPid also. Mark Wheeler, 3M Company ---------------------------------------------------------------------- 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
