VMware fault tolerance – some v. quick best practices

A feature most vCenter/ESX admins would be familiar with would fault tolerance (FT).  Well described as its chief use is for VM’s that need to be up 100 % of the time. FT creates and maintains an exact copy of a running virtual machine—secondary VM—on another host. Both VMs exchange heartbeats to monitor each other’s status. When … More VMware fault tolerance – some v. quick best practices

ESXi tip: Seeing NFS disconnection issues on NetApp filers on ESXi 5.5/6?

Nasty issue this one, again as from previous article thought it might have gone away with v6 but alas seen it again strike in that version – trick is to employ workaround 2 and adjust the MaxQueueDepth parameter: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2016122

ESXi tip : power management option greyed out? check your BIOS setup

Have seen this in the past with using HP’s in particular and using their inbuilt installation wizard when setting up the hosts, can set the performance option but afterwards is greyed out when checking the web / traditional client. Go to Bios settings section and need to set OS control or OS Control Mode depending … More ESXi tip : power management option greyed out? check your BIOS setup

ESXi 5.5 tip: Using LUNs and Windows VM’s – have them prepared for path failover

Path Failover and Virtual Machines Path failover occurs when the active path to a LUN is changed from one path to another, usually because of a SAN component failure along the current path. When a path fails, storage I/O might pause for 30 to 60 seconds until your host determines that the link is unavailable … More ESXi 5.5 tip: Using LUNs and Windows VM’s – have them prepared for path failover

PVS tip : Creating PVS vDisk using vSphere 6.x VM hw 10 (or 11)? Need to watch out for following

Found this out recently when looking to utilize the latest VM h/w – fix was as per http://support.citrix.com/article/CTX200969 Issue Citrix Provisioning Services (PVS) imaging fails for Target Device on ESXi 6.0 with VM version 10 and 11. Solution ESXi VM Hardware version 10 and 11 include a SATA controller for CD/DVD Media by default. If … More PVS tip : Creating PVS vDisk using vSphere 6.x VM hw 10 (or 11)? Need to watch out for following