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Thin disks created on VMFS-6 are initially backed with SFBs. While the SFB size can range from 64KB to 1MB for future use-cases, VMFS-6 in vSphere 6.5 is utilizing an SFB size of 1MB only. VMFS-6 introduces two new block sizes, referred to as small file block (SFB) and large file block (LFB). File System Resource Management File Block Format This means that VMFS-6 is ready to fully support the new, larger capacity, 4KN sector disk drives when vSphere supports them. Sector ReadinessĪs part of future-proofing, all metadata on VMFS-6 is aligned on 4KB blocks. In this section, some of the new features and characteristics of this new file system are explored. VMFS-6 is the new filesystem version that is included with the vSphere 6.5 release. These drives are now supported on vSphere 6.5 for VMFS and RDM (Raw Device Mappings). These drives will have a physical sector size of 4K but the logical sector size of 512 bytes and are called 512e drives. Given that legacy applications and operating systems may not be able to support 4KN drives, the storage industry has proposed an intermediate step to support legacy applications by providing 4K sector size drives in 512 emulation (512e) mode. These AF drives allow disk drive vendors to build high capacity drives which also provide better performance, efficient space utilization, and improved reliability and error correction capability. To address this issue, the storage industry has proposed a new Advanced Format (AF) drives which use a 4K native sector size. The storage industry is hitting capacity limits with 512N (native) sector size used currently in rotating storage media. However, there is still a LUN connectivity limit that needs to be considered, so if host-to-LUN connectivity limits increase in future releases of vSphere, VMFS will also be able to support increases host connectivity.
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With improvements to the heartbeat metadata area on VMFS-6, there is now support for up to 1,000 hosts connecting to the same datastore.
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This is a two-fold increase from previous versions of ESXi where the number of devices supported per host was limited to 256. DevicesĮSXi hosts running version 6.5 can now support up to 512 devices. This is an increase from the 1024 paths that were supported in previous versions of vSphere. The script is pretty straightforward.ESXi hosts running version 6.5 can now support up to 2,000 paths in total. PowerCLI scriptįirst of all power off the VM from the OS, the console, vCenter, PowerCLI or whatever way you want. As this issue is just annoying I am not scheduling an outage for the VM’s to make the change, but only when I have VM’s that I can take a quick outage on. This can be done a couple of ways but I whipped up a quick PowerCLI script to change the vmx file quickly when I have one off for regular maintenance. You need to modify the vmx file of the VM when it is powered off. This results in changing the screen resolution of the guest.
#VMWARE VSPHERE 6.5 POWERCLI WINDOWS#
When opening or resizing VMRC of any versions or Web Console of Web Client 6.5, the screen resolution of Windows Guest OS changes to fit the window size of the client if the guest OS is Windows. The symptoms fitted exactly what I was seeing and tested:
#VMWARE VSPHERE 6.5 POWERCLI HOW TO#
How to disable auto-fitting of Windows guest OS screen resolution when accessing from Web Client and VMRC (52031) I noticed this seemed to be happening since we upgraded to vCenter 6.5 so after some Googling I found the VMware KB article: It turned out people were using the Virtual Machine Remote Console or Web Console from vCenter to access the VM’s console and it was changing the resolution of the VM’s operating system to whatever the size of the web browser window was set to.Īnnoying more than anything but after a couple of times finding someone with a HD monitor in portrait resolution setting the VM to 1080x1920 I decided to see what was going on and stop it. I set the VM’s at 1280x800 but was seeing resolutions all over the place. Recently I noticed that when logging into VM’s at the console level through vCenter the resolution was all messed up.