Browsing Posts in vSphere

VMware Virtual SAN (VSAN) 6.1 was announced during the VMworld US 2015 with some new interesting features. Now it’s finally available on VMware vSphere download page. Considering that it’s implemented at hypervisor level, there isn’t a specific download: you have to upgrade (or download) vSphere 6.0 Update 1. VMware Virtual SAN 6.1 increases data protection options for business-critical environments with the new Stretched Cluster feature providing zero-point Recovery Point Objective (RPO) and enhanced VMware vSphere Replication. Additionally, VMware Virtual SAN 6.1 enables new advanced management and monitoring through deep integration with VMware vRealize Operations and […]

Several months ago VMware announce vSphere APIs for IO Filtering (VAIO) as a solution to implement 3rd Party Software-Defined Data Services in vSphere 6.0. VAIO offers partners the ability to put their technology directly into the IO stream of a VM through a filter that intercepts data before it is committed to disk. It’s a good and efficient idea to implement features like caching or replication without the need of external components (or appliance) or kernel modules like today. But this a partner program (like the Virtual Volumes) and unless partners have not developed this […]

VMware snapshots are widely used for different purpose, but the main reason why they exist in vSphere is to help backup programs: using VADP a backup can start a VM snapshot in order to have a frozen file, copy it (or copy only the changed block with CBT and virtual hardware 7 or greater) and then release the snapshot. Other usage are to have a just in point rollback during patches or big changes, but a recommended practice is to release the snapshot as soon as possible. Large snapshots or broken or invalid snapshots are […]

If you are planning an in-place upgrade of a vCenter Server (the Windows installable version) you have to read carefully the vSphere Upgrade Center resources to avoid possible issues. Of course you can choose to install a new vCenter Server instance a move all to the new one. Maybe could be the right moment to switch to the vCenter Server Appliance (there is also a Flings to move your vCenter Windows data to a VCSA instance). But sometimes it’s not possible and should be preferable an in-place upgrade.

If you have installed (or upgraded to) VMware vSphere 6.0 and you still use the old legacy vSphere client you may have some false positives about VM snapshots. All VMs seems to have some snapshots, also if they don’t (and using consolidate does not fix it, because there aren’t snapshots to be fixed). But this apper only with the Windows vSphere Client:

VMware vSphere design is something important for VMware beginner, VMware engineer, VMware SME, or VMware architect. It’s not only related to know well the technologies, but understand how use it in the right way (in the right cases). VMware vSphere Design Essentials is a short book (only 176 pages), but with a good approach for design an IT environment, particularly a VMware vSphere based.

Recently I’ve got a strange issue on ESXi 6.0: after an host reboot the ESXi hosts display a false positive warning: Deprecated VMFS volume(s) found on the host. Please consider upgrading volume(s) to the latest version Starting with vSphere 6.0 the VMFS3 version is now deprecated, but in my case all block based datastores were already at VMFS version 5!

After an upgrade to VMware vSphere 5.5 on a Dell PowerEdge R710, I’ve got strange occasion issues, where the hosts got completly disconnected from vCenter (with the ESXi/ESX host’s status as Not Responding or Disconnected in vCenter Server) and there was no way to reconnect, also after restarting the management services. Locking in the ESXi console those kind of errors where notable: Bootbank cannot be found at path ‘/bootbank’. The only temporally solution was power-off the VMs and restart the host. But the issue can randomly came back.

In previous posts (see ESXi – Partitions layout of system disk and ESXi – More on partitions) I’ve described how are handles the partitions table on the destination installation media of ESXi 5.x (both in the case of a hard disk or a SD/USB disk). With the new ESXi 6.0 the partition tables is similar in the case of a 1 or 2 GB destination device (like a previous SD media), but has some changes in the case of larger devices. Core partitions remain the same with standard size:

Due to the changes in the new vCenter Server 6.0 architecture, the SSO has now been incorporated in the new VMware Platform Services Controller “role”. But the concepts of a global SSO accounts still exist and remain important to manage the infrastructure (and more important during installation and upgrade). If you forget the SSO admin password you can have some trouble. I’ve already wrote on how reset the VMware SSO password in the vSphere 5.1 and 5.5 versions and the procedure remain almost the same also in the 6.0 version.

In previous post we have already see how add custom drivers to an ESXi installation ISO and how use ImageBuilder to make custom ESXi ISO, but in other cases you may need to define some custom settings during the installation or add custom vib files. Booting from CD is not the only way, but custom ISO could be used also for boot from USB or for boot from virtual devices (like the iDRAC or ILOE). In case you need to build custom ISO with custom option this post could help you: How to Create Bootable ESXi […]

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