Wu's Blog

Tag: storage

  • PortChannel does not work on Cisco UCS Fabric Interconnect

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    Whatever  you configure on MDS, whatever you configure on Cisco UCS FIs, whatever you do for port channel on both side, the Cisco UCS uplink ports always down with error message Initilize failed, or Error disabled. Congratulation! your device hit MDS firmware bug…https://tools.cisco.com/bugsearch/bug/CSCtr01652/?reffering_site=dumpcr.  

  • Device or Resource Busy

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    You may read my post How to find which ESXi 5.1 host lock the VM, it’s a solution to figure out which host lock down a file. But sometimes you may face similar problem but different solution. You are able to browse the file by CLI or GUI, but cannot delete by either way. It returns…

  • How to get HBA WWPN of ESXi hosts

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    It’s busy month, I haven’t update my blog since I back from Phuket with my wife. I’m running into multiple projects, a little overload. Just a quick share, my storage team ask me provide WWPN of all hosts to do a health check. it’s nightmare to pull out the data from vSphere client or web…

  • Windows cannot be installed on drive 0 partition 1

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    I think Windows Server 2012 will be next popular server OS just like Windows Server 2008, it’s also a nice hypervisor OS on virtual world. How do you think? Installation is first step to experience the wonderful OS, you may see some strange problem during that step just like me. Today’s topic occurred long time…

  • Nodes in the ESXi cluster may report corruption after reboot host or attach device

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    VCE just released a new KB vce2563 to description the issue. If your ESXi 5.x hosts is connected on VMAX running Enginuity 5876.159.102 and later, you may see this particular issue after reboot ESXi host or attach storage if you enabled block delete feature of VAAI. To check the option status you can run following command on…

  • Error 2931 The connection to the VMM agent on the virtualization server was lost

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    Windows Server 2012, the biggest competitor of VMware vSphere. There are adequate reason to use Hyper-V 2012 instead of vSphere 5.x, but it’s still very hard to for newbie, we spend more than 30 hours to try figure out how to create cluster on SCVMM 2012 SP1, the software is easy to install, but hard…

  • How to configure vSAN on nested ESXi hosts with SSD hard disk

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    There are lot of articles introduce vSAN feature and steps by steps guide. I referred William Lam’s article & Duncan’s article to configure vSAN on my lab, I was true I exactly followed his steps to configure the vSAN, but I can not saw anything under disk field under Disk Management. Please note: Following steps does not…

  • How to decode ESXi 5.x SCSI error code

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    Storage is critical component for virtualization, lot of VM performance issue is related to storage latency. You may see similar error message on vmkernel log for some case: 2014-02-11T07:18:20.541Z cpu8:425351)ScsiDeviceIO: 2331: Cmd(0x4124425bc700) 0x2a, CmdSN 0xd5 from world 602789 to dev “naa.514f0c5c11a00025” failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x4 0x44 0x0 It much like language…

  • vHBAs and other PCI devices may stop responding in ESXi 5.x when using Interrupt Remapping

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    Your vHBAs or other PCI devices may stop running in ESXi 5.x when using Interrupt Remapping feature. This issue only impact to UCS blade BIOS version 1.4(3c), it has been fixed on 1.4(3j). Please refer to http://kb.vmware.com/kb/1030265 to see how to disable Interrupt Remapping feature in ESXi 5.x Also refer to https://tools.cisco.com/bugsearch/bug/CSCty96722.

  • IPv6 link in NetApp SMVI backup log

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    NetApp Virtual Storage Console is my favorite to manage and backup data on NetApp attached ESXi host, there is lot of benefits to secure VM data more efficient. The installation is pretty simple, and very less resource it requires, you can even install it on a multi-role virtual machine. But the first headache maybe the…