Hello List, Recently we bought a md3000i for our storage needs. This box comes with two redundant controllers and both controller has two networkports. We connected all four ports to our testing network, and I let some servers mount the md3000i. The goal is to have all four connections on the server available with a redundant network, so that we can failover if one switch dies or if a controller dies.
However, the controller does not have support an active-active state, which means that if you open four connections to the four ports, you will get two faulty connections. With multipath this isn't a big problem as it can see fairly quick if a controller is offline and it switches to the other controller: $ multipath -ll webdata (36001ec9000d163110000067f484e260c) dm-0 DELL ,MD3000i [size=2.0T][features=0][hwhandler=0] \_ round-robin 0 [prio=1][enabled] \_ 4:0:0:0 sda 8:0 [active][ready] \_ round-robin 0 [prio=1000][active] \_ 5:0:0:0 sdb 8:16 [active][ready] \_ round-robin 0 [prio=0][enabled] \_ 6:0:0:0 sdc 8:32 [active][faulty] \_ round-robin 0 [prio=0][enabled] \_ 7:0:0:0 sdd 8:48 [active][faulty] (yes, I know the prio's are a bit strange, but that is to test something else). This all works quite well, but the problem we have is a massive amount of spam in dmesg / kern.log / syslog. In syslog we get this every 3 seconds: Aug 19 14:54:12 abaris kernel: [691035.298493] end_request: I/O error, dev sdc, sector 0 Aug 19 14:54:12 abaris kernel: [691035.366443] end_request: I/O error, dev sdd, sector 0 Aug 19 14:54:13 abaris multipathd: sdc: directio checker reports path is down Aug 19 14:54:13 abaris multipathd: sdd: directio checker reports path is down This is of course useful information, but to get this 28.800 times per day in your log is a waste of space, beside making it impossible to read other messages without grepping. Now this can still be reduced by adding some syslog filters, but the other problem is dmesg: $ dmesg [691098.658507] end_request: I/O error, dev sdc, sector 0 [691098.704036] end_request: I/O error, dev sdd, sector 0 [691101.678930] end_request: I/O error, dev sdc, sector 0 [691101.738252] end_request: I/O error, dev sdd, sector 0 And this goes on for every 3 seconds as long as the connection is logged in. So my questions: - Is there a way to suppress those messages, either in the iscsi programs or in multipath? - If that fails, is it possible to tweak multipath in such a way that it doesn't check the two failed paths, unless there is no other path available? These two paths should become available only if the main controller dies. Thanks in advance, Kees Hoekzema --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
