Hello, I have problem with the linuxrdac dkms module used for our four-node (no failover) cluster attached to md3000 SAS. all the nodes need accesing single LUN. the linuxrdac module (09.03.0C06.0030) on two nodes attached to different controllers tries to rebalance the LUN ownership for the particular controller. However another node attached to the other controller does the same and claims the LUN for its controller. This leeds to neverending loop.
We are running the linuxrdac module with the option DisableLUNRebalance=3, which should make it working, but seems to do nothing. How can be single LUN access from different controllers? When the issue occurs, the logs are flooded with following messages and the system stops responding. Oct 22 00:16:24 vmc1n2 kernel: 10 [RAIDarray.mpp]storage1:1 Failover command issued Oct 22 00:16:26 vmc1n2 kernel: printk: 8 messages suppressed. Oct 22 00:16:26 vmc1n2 kernel: peth2: received packet with own address as source address Oct 22 00:16:26 vmc1n2 kernel: 801 [RAIDarray.mpp]Failover succeeded to storage1:1 Oct 22 00:16:27 vmc1n2 kernel: 500 [RAIDarray.mpp]storage1:1:0:0 Fail to current ctrl 1.. vcmnd SN 128187298 pdev H1:C0:T0:L0 0x05/0x94/0x01 0x08000002 mpp_sta tus:1 We are using CentOS 5.3. the /etc/mpp.conf has following content VirtualDiskProductId=MD Virtual Disk DebugLevel=0x0 NotReadyWaitTime=270 BusyWaitTime=270 QuiescenceWaitTime=270 InquiryWaitTime=60 MaxLunsPerArray=256 MaxPathsPerController=4 ScanInterval=60 InquiryInterval=1 MaxArrayModules=30 ErrorLevel=3 SelectionTimeoutRetryCount=0 UaRetryCount=10 RetryCount=10 SynchTimeout=170 FailOverQuiescenceTime=20 FailoverTimeout=120 FailBackToCurrentAllowed=1 ControllerIoWaitTime=300 ArrayIoWaitTime=600 DisableLUNRebalance=3 IdlePathCheckingInterval=60 RecheckFailedPathWaitTime=30 FailedPathCheckingInterval=60 ArrayFailoverWaitTime=300 PrintSenseBuffer=0 ClassicModeFailover=0 AVTModeFailover=0 LunFailoverDelay=3 LoadBalancePolicy=1 S2ToS3Key=53330e43161917b8 thank you, stepan.
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