I've run into an annoying problem and hope someone can point me in the right direction. Its probably a wrong config parm somewhere, but I'm just not seeing it.
I have a SLES 11 SP1 server running under z/VM. It already has 1 SAN LUN attached to it via direct connections and NPIV. zFCP and multipathd are already in place and it works fine. I'm adding a 2nd LUN to the server, from the same storage host. At first, I assumed that I should add 2 new paths to the server for the new LUN, which is what I did. The original 2 vdevices are 2000 and 3000. So, I added 2100 and 3100 and connected them to two new rdevs on the VM side, as usual. The LUN was created on the storage host, mapped to server and SAN zones created. All good. Now, I defined the zFCP configs for 2100 and 3100 and mapped them to LUN 1. 2000 and 3000 are still mapped to LUN 0. Things look OK. lxfdrwb2:/etc # lszfcp -D 0.0.2000/0x500507680130eda4/0x0000000000000000 1:0:2:0 0.0.3000/0x500507680140ed9c/0x0000000000000000 0:0:7:0 0.0.2100/0x500507680120eda4/0x0000000000000001 2:0:3:0 0.0.3100/0x500507680110ed9c/0x0000000000000001 3:0:2:0 However, multipathd continues to ONLY see the original 3.9TB LUN. It seems to interpret the changes as 4 paths to LUN 0, instead of 2 paths to LUN 0 and 2 paths to LUN 1. lxfdrwb2:/etc # multipath -ll 3600507680180876ce000000000000029 dm-0 IBM,2145 size=3.9T features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='round-robin 0' prio=50 status=active | |- 0:0:7:0 sda 8:0 active ready running | `- 3:0:2:0 sdd 8:48 active ready running `-+- policy='round-robin 0' prio=10 status=enabled |- 1:0:2:0 sdb 8:16 active ready running `- 2:0:3:0 sdc 8:32 active ready running I've tried flushing the multipath map. I've even deleted the original zFCP configuration and rebuilding it. Nothing seems to help. It also occurred to me that I might use the original 2 paths (2000 and 3000) to also connect to LUN 1, but zFCP will have none of that. I suspect that there is a multipath or zfcp parameter that I have wrong, but Googling around hasn't yielded any answers yet. I'm sure others have done this, can you steer me in the right direction? I do this all the time with Edev disks, but not as much for direct attaches. Martha ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
