EMC CX is an active/passive array so MRU is the policy to use. Your VMs will freeze ro hang as soon as you initiate LUN trespassing on CX. The zoning is all right but you have to manually a...
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EMC CX is an active/passive array so MRU is the policy to use. Your VMs will freeze ro hang as soon as you initiate LUN trespassing on CX. The zoning is all right but you have to manually adjust the paths on the esxi hosts. Check the log on CX and you might find that lots of trespassing is happening. Check and confirm that current lun owner and the original lun owner SP is same. If not adjust them. Accordingly adjust the paths on esxi to balance the load but make sure that if spa is the owner hba0 should be the preferred path and if spb is the owner hba1 should be the preferrrecd path
Are you using ESXi or ESX? You can check the logs anytime and you don't need a testing time for that. I think I have seen an issue almost like this before. CX is an active / passive array and LU...
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Are you using ESXi or ESX? You can check the logs anytime and you don't need a testing time for that. I think I have seen an issue almost like this before. CX is an active / passive array and LUN trespassing sometimes causes the issues.
Hi JS I think the problem is within my HP VC Connect Flex modules. I installed MEZZ cards on one of the esxi hosts and used the passthrough modules on the enclosure to connect to SAN. Moved th...
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Hi JS I think the problem is within my HP VC Connect Flex modules. I installed MEZZ cards on one of the esxi hosts and used the passthrough modules on the enclosure to connect to SAN. Moved the VMs to this new host and the freezing issue is gone. I monitored the old hosts in the cluster and noticed huge number of vmkernel NMP errors. looks like there is some path flapping is happening. I am using HDS AMS2500 storage array which is an active / active array. I have seen those vmkernel errors before with EMC Clariion. I have told this to hp and vmware. Because the enclosure uses FCoE within the enclosure it might be an issue with the vc flex firmware. Vmware thinks it might be a bug also. My vms are running fine on the other host and I am doing some more troubleshooting on this. Will keep you posted if I get something.
unfortunately nothing in the log. I checked /var/log/messages, dmesg. ran tcpdump but no network activity. the kernel log module is not loaded. redhat decided to take that off without notice. ...
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unfortunately nothing in the log. I checked /var/log/messages, dmesg. ran tcpdump but no network activity. the kernel log module is not loaded. redhat decided to take that off without notice. I will load the module tomorrow so that i can see the kernel messages easily. but for the time being dmesg is my friend.
Hi Guys I am having a very strange issue. I have 2 RHEL 5.5 VMs in my environment. The VMs freeze without any reason for 5 seconds and then resume. One VM is running Oracle on it and the other...
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Hi Guys I am having a very strange issue. I have 2 RHEL 5.5 VMs in my environment. The VMs freeze without any reason for 5 seconds and then resume. One VM is running Oracle on it and the other is running a business application. Both of the VMs are running on separate hosts on the cluster. Hosts are esxi 4.1 and resources are not the issue here because nothing else is using the cluster. Each host has 12 cores and 96 GB RAM. The storage is on SAN. Application VM has 8 GB RAM and 1 vCPU and database vm has 16 GB ram and 1 vCPU. I don't see anything in the /var/log/messages regarding this freeze. Can someone please provide some guidence for troubleshooting? Regards Shail
Hi Friends Can someone please clear the following confusions? 1. When we create an uplink group on vd switch we can configure VLAN TRUNK as VLAN TYPE and supply a VLAN ...
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Hi Friends Can someone please clear the following confusions? 1. When we create an uplink group on vd switch we can configure VLAN TRUNK as VLAN TYPE and supply a VLAN range. If I do that can I configure those VLANs on dv Ports? If yes how? 2. What is the use of dv ports? Is there any detailed guide available on dv Switch? 3. We can also configure VLAN TRUNK on vd port groups. What is the use of configuring trunk on a port group? Do I need to install 802.1q tagging software on my virtual machines, if I am using the VLAN TRUNK on port group? 4. Can I connect the vm directly to dv ports without creating port groups? I have knowledge of VMware but I am kinda stuck with these confusions because dvSwitch is new to me. Thanks in advance guys.
Hi guys I am trying to add a new hdd to a linuc virtual server but it is not detecting within the os. Does anyone know any trick. I don't want to restart the server Thanks
Hi Guys I have a RHEL 5 cluster running on ESX 3.5. The active node in cluster which is DB1 showing me 12% memory utilization within VI client whereas if I check within the VM by using to...
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Hi Guys I have a RHEL 5 cluster running on ESX 3.5. The active node in cluster which is DB1 showing me 12% memory utilization within VI client whereas if I check within the VM by using top it shows me a very different figure ( 30 % ). I don't understand why there is so big difference? Can someone please explain this to me? Secondly if someone knows the link to any pdf related to this please let me know. Thanks
Hi Friends I just saw a discussion saying that we can take the snapshots and backup of RDM in Virtual mode . That is right. But what if I am running a cluster across 2 physical hosts and ...
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Hi Friends I just saw a discussion saying that we can take the snapshots and backup of RDM in Virtual mode . That is right. But what if I am running a cluster across 2 physical hosts and using RDM in physical mode. I think we can only use virtual mode if both of the vm's which are using the RDM reside on the same physical host. Is is possible to use the virtual mode RDM for a cluster across multiple physical hosts? I think it is not possible because VMware says no to that. Any way I have been looking a solution for that. If someone is having a physical mode RDM and is taking the snapshots please help me? Thanks
Hi Friends I have a Windows 2000 professional box which I want to virtualize. The VMware Converter version is 3.0. The conversion starts and it jumps from 5% to 95% instantly and t...
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Hi Friends I have a Windows 2000 professional box which I want to virtualize. The VMware Converter version is 3.0. The conversion starts and it jumps from 5% to 95% instantly and then fails. All the services are running except VSS which is not installed at all. I am using the local admin account. Networking is good and I can open a telnet session on port 902 from the source. Any idea Thanks in advance Shail