VMware ESXi 8 has dropped the compatibility with a lot of old CPU models, a...
In VMware Workstation 17.6.1, when I create a Rocky Linux VM, there is no w...
Minimum viability refers to the set of essential resources and capabil...
Sometimes you need to verify your security products to be sure that they ar...
System virtualization remain the foundation of several datacenter infrastru...
Veeam Backup & Replication 13, the next next major release, will be pro...
Recent VMware security bug (VMSA-2017-0006) is related to one of the worst...
Starting with ESXi 7.0 the partions layout has totally changed, compared to...
The legacy C# vSphere Client for Windows is no more available for vSphere 6...
CentOS Linux was a freely available, community-supported Linux distribution...
Reading Time: 3 minutesWith the term virtualization usually we are talking about System Virtualization, where a physical system is “partitioned” to permit multiple environments (using virtual machines). But virtualization is more generic and include different types:
Reading Time: 5 minutesStorage is an important part of a virtual infrastructure, but compared with the server part (that provide computational “power”) the different storage vendor’s solutions are not so homogeneous and easy to compare or understand. Of course because there are different positioning but also a lot of different aspects, but in most cases, the most important aspects are also the “hidden” or the less described. What is probably clear is the difference between local storage (DAS) and shared storage (SAN or NAS, but sometimes also some kind of DAS) and why shared storage is so important: […]
Reading Time: 2 minutesAs written in the previous posts, in the ESXi installation there are two copy of the system image located in two different partitions (see Partitions layout of system disk and More on partitions posts). The actual system image is located on the first 250 MB partition, formatted with plain old FAT16 filesystem, but using a special pseudo-filesystem on it (see VisorFS: A Special-purpose File System for Efficient Handling of System Images). The image itself, s.v00, is a 124 MB compressed file, which is decompressed on boot and contains the hypervisor operating system. Note that the […]
Reading Time: 2 minutesReset the root password with ESX 3.x was quite simple, just because the service console was a partition writable a live CD… With ESX 4.x it was a little more complicated (the service console was basically a vmdk). But with ESXi things are more complicated, due to the partition layout, that ESXi works in RAM and that all configurations files are stored in the banks it special archive files. The file containing the password hashes is called “shadow” and it is is contained in a nested structure of archives inside the state.tgz file.
Reading Time: 4 minutesI’ve read some posts (see in the bottom of this post for the references) and I notice how the hypervisor comparison and choosing criteria are still a interesting trend and not only a marketing battle between different vendors (and maybe there will be more interest will be on this aspects with the release of Windows Server 8). But in several cases the comparison is limited to the hypervisor technical characteristics (and I’ve already written something about Hyper-V 3.0, XenServer 6.0 and RHEV 3.0) without considering (except in some cases) that the those are only one […]
Reading Time: 3 minutesOne trend in the last year(s) is that the virtualization ecosystem is growing outside the boundary where was born: historical partner vendor of VMware now are extending their solution to other hypervisors, and also also new products are designed to managed a more complex virtual environment. This was also called “Hypervisor Agnosticism” in a VKernel post. We do not talk about interoperability across different hypervisors, but simple use same tools, especially for management, monitoring and data protection, for more type of products. Does it make sense? For a single customer maybe not… have multiple environment […]
Reading Time: 3 minutesOne curios thing of both ExaGrid and Dell DR4000 solutions (but also other solutions) is that they lack of a Virtual Tape Library (VTL) feature and only work as a network share (with CIFS or NFS). In both cases the reason was not technical (but I think that the main reason is still just a way to reduce cost and complexity) but marketing/strategy (customers just don’t ask at this feature). But moving from a backup to tape (B2T) to a backup to disk (B2D) solution does not necessary mean move to backup to file (over […]
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