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Virtualization

Case of Dead Path on ESXi

November 9, 2018 , ,

I had 8 paths go down to a dead state on an ESXi host.  The paths were MRU via Fiber Channel to a storage array.  One path worked and it was configured as RR path. I knew this wasn't a physical issue, it had to be a software/configuration issue on my host because there were: No storage array errors Additional hosts in the cluster had no Read more →
Virtualization

Performance tuning iSCSI Round Robin policies in ESXi for Nimble storage

August 8, 2018 , , ,

Here's an ESXi console script to loop through each Nimble eui.* adapter and set IOPS=0 and BYTES=0 (per Nimble recommendations). for x in `esxcli storage nmp device list | awk '/Nimble iSCSI Disk/{print $7}' | sed -e 's/(//' -e 's/)//'`; do echo $x esxcli storage nmp psp roundrobin deviceconfig set -d $x -t bytes -B 0; esxcli storage nmp psp roundrobin Read more →
Hardware Virtualization

IBM System X3850 Disable Processor Power Management

August 8, 2018 , , , ,

In order to work around the issue processor power management has to be disabled in system UEFI and vSphere Client. To change power policies using server UEFI settings: Turn on the server. Note: If necessary, connect a keyboard, monitor, and mouse to the console breakout cable and connect the console breakout cable to the compute node. When the Read more →