After newly installed vCSA 7.0U2，The main screen appears “Insufficient set resources，Unable to meet the required failover on the cluster (HA) Level” Error message，Try to adjust the proportion of reserved resources in the "Admission Control" of HA，But can't make the message disappear。Internet crawl text after，It turned out to be only caused by the rigor of the concept and HA mechanism。
After updating vCenter today，Status will pop up on the Update Manager page 404 錯誤，Many options are also abnormal：
vCenter version：6.5 U3f 15259038
ESXi pre-upgrade version：6.0 U2
ESXi upgraded version：6.5 U2
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i：Start editing at the cursor position。
the：Start editing under the cursor。
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Version before vCSA upgrade：6.0 U3i 13638623
Version after vCSA upgrade：6.5 U3f 15259038
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Generally, ESXi has very simple actions when upgrading，After booting with a flash drive，After selecting a few options that don’t need to be considered，Installation can be completed in a short time。But this time my HP server is updating ESXi 5.5 To 6.0 Time，Met one “Mellanox_bootbonk_net” mistake，Not only cause the update to fail，And the original ESXi is also broken，So I had to reinstall ESXi。
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Recently, when ESXi was upgraded，Moving a few specific VMs will appear “A general system error occurred：VM not found” Error message，Try to go directly to the datastore and right-click the .vmx file to log in to the target ESXi Server, but a login error message also appears。
vCSA source version：5.5 U3k 9911210
vCSA target version：6.0 U3i 13638623
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When uploading files in the vSphere Web Client，There will be a message that you need to install the "Client Integration Plug-in" first，But I logged into vSphere Web Client again after installation，When clicking the upload file icon，The message asking me to install the "Client Integration Plug-in" still appears。
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recently bought a DELL R7515 server，The following error occurred when booting：
UEFI0391: Memory configuration supported but not optimal for the enabled NUMA node Per Socket (NPS) setting.
Anson | 
04 14th, 2021| 
