Lately I visited a customer who, depending on their customers SLA, provided either SRM protected VM’s (SLA-1) or non-SRM protected VM’s (SLA-2). The technical difference between these SLA’s is that SRM protected VM’s must be placed on LUN’s that are replicated between storage arrays. Different departments are responsible for creating either SLA-1 or SLA-2 VM’s and operational procedures are in place to make sure that the right […]
All posts in category VMware vCenter
How to quickly discover a "VM to Resource Pool" mapping
Everyone knows the situation in where a (s)VMotion asks you to select a Resource Pool. I would love to see that VMware automatically selects the current VM’s Resource Pool but unfortunately we have to make a selection since it defaults to the cluster. When we leave it to default it obviously causes the VM to […]
Posted by Kenneth van Ditmarsch on January 29, 2010
https://virtualkenneth.com/2010/01/29/how-to-quickly-discover-a-vm-to-resource-pool-mapping/
VMware vCenter Storage Views: Partial/No Redundancy
While exploring my software iSCSI initator environment I noticed that all my VM’s on every host are reporting a “Partial/No Redundancy”-status within the Multipathing Status even though I have Round Robin in place and thus 2 paths to the storage. This behavior is a bug as confirmed by VMware Technical Support. The rule for displaying […]
Posted by Kenneth van Ditmarsch on December 15, 2009
https://virtualkenneth.com/2009/12/15/vmware-vcenter-storage-views-partialno-redundancy/
Creating easy to identify LeftHand Volumes on ESX/vSphere
Coming from mostly HP EVA environments I got used to identify a Volume/LUN by there LUN number which was a real unique identifier. I could always “talk” LUN number and be sure that it was understood and unique. So ever since I’ve been working with our LeftHand environment I disliked the way that every Volume/LUN is marked […]
Posted by Kenneth van Ditmarsch on December 3, 2009
https://virtualkenneth.com/2009/12/03/creating-easy-to-identify-lefthand-volumes-on-esxvsphere/
Automatic Rescan of your HBAs… How to enable this again
Duncan Epping wrote an helpful article about disabling the automatic rescan of HBA’s whenever you add, remove of expand a datastore. Remember, turning this off isn’t a best practise for production environments but could come in handy when building a new site while avoiding “rescan storms”. Now the trick is to enable […]
Posted by Kenneth van Ditmarsch on October 9, 2009
https://virtualkenneth.com/2009/10/09/automatic-rescan-of-your-hbas-how-to-enable-this-again/
VMware Update Manager on vSphere – Check the Firewall!
Yesterday I noticed something strange while updating a VI3 environment to vSphere with Update Manager 4.0 The update of update manager went fine as well as the creation of new baselines. Whenever I remediated a Host, the Host went into maintenance mode and the remediate process hangs on 33%. This same behaviour occured when I […]
Posted by Kenneth van Ditmarsch on August 27, 2009
https://virtualkenneth.com/2009/08/27/vmware-update-manager-on-vsphere-check-the-firewall/
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