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When running virtual machines on a local or directly attached SAS storage with IBM HS23 blades, you experience these symptoms: Slow virtual machine I/O performance.I/O starts as expected, but then decreases.No errors or events are logged in the vmkernel.log file.The esxtop command reports high DAVG values during the slow performance.
This issue occurs when two VIB files are installed, one by the standard ISO provided by VMware and another by the IBM in their customized image.
To work around this issue: Run these commands in either the DCUI or via an SSH session: # esxcli software vib remove -n ilfu # esxcli software vib remove -n LSIProvider (For ESXi 5.0) # esxcli software vib remove -n lsiprovider (For ESXi 5.1/5.5) Restart the ESXi host. Note: This issue does not occur with VMware vSphere Hypervisor 5.0 Update 1 IBM Customized image.For more information, see IBM Documentation reference 5089598.Note: The preceding link was correct as of May 08, 2015. If you find the link is broken, provide feedback and a VMware employee will update the link.
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