[Release] vSphere 5.1 Update 1

VMware has released Update 1 for vCenter Server 5.1 and ESXi 5.1:

• vCenter Server 5.1 Update 1: Download, Release Notes
• ESXi 5.1 Update 1: Download, Release Notes

Both updates include tons of bug fixes. Here are some highlights of what issues were fixed (read the release notes for a full list):

vCenter Server 5.1 Update 1

• False alarms reported for VMs (KB2009783)
• Unable to clone a vApp on a Datastore cluster
• Performance stats for last year shows only one month (KB2042009)
• Login to Web Client fails with non-ASCII characters in username
• Advanced performance charts display very slowly in Web Client
• Logging into vCenter Server using the vSphere Client with vCenter Single Sign-On (SSO) in a multi-domain environment fails (KB2037410)
• vSphere Client stops responding when Virtual Machines are hidden from view (KB2016224)
• Unable to vMotion a VM that is connected to a vDS without uplinks (KB1003832)
• Storage vMotion does not rename VM files (KB2008877)

ESXi 5.1 Update 1

• ESXi host UUID field byte orders were not reported as per SMBIOS version 2.6 (this resulted in "VM was moved or copied" messages after upgrading a host from ESXi 4.x).
• SNMP trap files fill up root inode tables, resulting in host disconnection (KB2040707)
• Virtual machines become unresponsive with busy vCPUs on ESXi 5.1 (KB2045154)
• Multiple vMotion interfaces and long running vMotion(s) result in unicast flooding (KB2000119)
• ESXi 5.1 host fails with a purple diagnostic screen when Beacon probing is enabled (KB2038281)
• If a quiesced snapshot fails redo logs are not consolidated
• Lots of VMware Tools issues were fixed.

Please note that a lot of these issues have already been fixed for vSphere 5.0 with 5.0 Update 2, and these fixes have now been ported to vSphere 5.1 with 5.1 Update 1.

I have updated my ESXi 5.x Patch Matrix to include the new ESXi build.

An HP Customized Installation ISO with ESXi 5.1 Update 1 is also already available here.

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