Just ran into a Cisco UCS bug. When upgrading the UCS firmware of your environment, some B200M4 blades may reboot spontaniously. I won’t tell you how I found out, but be sure to read this article: Cisco Bug: CSCut61527 – B200M4 could reboot on shallow_chkpt when BMC returns invalid FRU data. https://tools.cisco.com/quickview/bug/CSCut61527 Affected firmware: 2.2(3) and 2.2(3a)A […]
Wishlist: KB article with Log Insight queries
With VMware Log Insight you can create great queries. For some environments we have known bugs and since we can’t always update as fast as we would like, I’ve built some simple queries to alert me whenever the bug is more likely to kick in. For example, I have a query that warns me by e-mail […]
Manage your VMware Metro Storage Cluster with Tags
Running a VMware vSphere Metro Storage Cluster (VMware vMSC) makes it possible to move VMs between two geographical locations without downtime. In a Metro Storage Cluster a vSphere Cluster consists of ESXi hosts from both locations with shared storage that is stretched over these locations. Using a VMware Metro Storage Cluster makes your environment even more resilliant against […]
Check correct path policy of RDMs
Our vSphere version combined with EMC VNX MCX OE version advices Round Robin as path policy. For RDMs used by a Microsoft Cluster however, Most-Recently-Used is the adviced policy. If a Microsoft Cluster has the incorrect path policy, there is a hughe latency on the RDM. We have noticed that reboot of the ESXi host or […]
Check the health of your storage paths
For you vSphere environment you always want to make sure that all paths to your storage system are connected. That is why in our vSphere environment we run a daily morning check that tells us if there are any death paths between hosts and storage. Before upgrades of our SAN or flare code upgrades of our […]