Anson | 
04 15th, 2021| 
recently put vSphere 5.5 Update to 7.0，Many articles have been published before，This is a sorting，This will be a bit clearer for the entire upgrade process，The entire upgrade procedure is as follows：
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Apr 15
Apr 15
Version before vCSA upgrade：6.5 U3f 15259038
Version after vCSA upgrade：7.0 U1d 17491101
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Apr 14
If it appears when logging in to the ESXi host “Permission to perform this operation was denied”，And login to vCSA is no problem，Then it may be caused by the ``locked mode'' enabled in vCenter Server。
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Apr 14
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。
Apr 14
After updating vCenter today，Status will pop up on the Update Manager page 404 錯誤，Many options are also abnormal：
Apr 12
vCenter version：6.5 U3f 15259038
ESXi pre-upgrade version：6.0 U2
ESXi upgraded version：6.5 U2
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Apr 8
Version before vCSA upgrade：6.0 U3i 13638623
Version after vCSA upgrade：6.5 U3f 15259038
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Apr 8
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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Apr 7
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。
