So you've hit a situation where a Fibre Channel link light has gone out and you don't know what is wrong. Alternately, perhaps you have extremely high latency on just one ESX hosts with regular storage disconnections (even though the link light looks fine) At a…
A little gem I came across when trying to add a bunch of new storage controllers to DNS (and not wanting to click through all the menus). Caveat - only Windows Server 2012 and beyond Unfortunately PowerShell in Windows 2008 seems quite limited in functionality - many highly useful cmdlets…
Often, MPHA faults can be easily attributed to a single SAS cable or SAS HBA fault, when an entire shelf or loop appears offline. What happens when a disk shows up as single path (when the disks surroundind it are multi-path)? Fault Summary In this scenario, we have a fabric…
Simple script (needs to run on a Linux host so awk can be used) to show all disks and versions of firmware. awk is used tostrip the disk name then to remove duplicate lines linuxhost# ssh -l admin cluster01 disk show -fields model,firmware-revision | awk '{print $2,$3}'…
This is just a simple cheat sheet I'll likely expand over time to capture all the useful information pertaining to fibre optic communications. Connectors The most common data connectors are outlined below LC Lucent Connector Typically used for 4Gbps+ Fibre Channel and 10Gbps Ethernet communications. Most structured cabling…