Your help will be highly appreciated, Please. Without having to change all the 1 PB of ESX clusters to thin provisioned. Press d to switch to disk view (HBA mode). Configuring monitoring using esxtop To monitor storage performance per HBA: Start esxtop by typing esxtop at the command line. There must be a command/utility that will report on actual Written Data numbers. The interactive esxtop utility can be used to provide I/O metrics over various devices attached to a VMware ESX host. In Unix I can do a simple command "df" that will display what was provisioned for a filesystem (Provisioned Space in VM), and what has actually been written to that filesystem. My question is simple: IS THERE NO way in vCenter/VMWare for a thick provisioned space to be able to see the ACTUAL "USED" storage (actual Written Data). If you give a bit more detail on the VM and the datastore we should be able to work this out. 80 warning 90 critical even though within each VMDK file you maybe using only a couple of GB. And the problem is that thee VM team keeps adding more storage, BECAUSE they base their analysis on PROVISIONED storage and think they are running out if adding new VMs, expanding use. If you assign more than 80 of your datastore to a VMDK or multiple VMDKs then the client will report a warning on usage. We have ESX clusters that have been given 100 TB 4 years ago, and are barely at 30% utilization. Comparing Datastore usage to Disk usage on the Server VM: Doesnt Match Im a little confused and could use some clarification from someone. Once you know your VMs' disk space requirements, you can design your datastore. The provisioned size is always the same as the consumed size. My problem is that the VM team continually over-provision. The disk consumes its maximum size from the datastore from its creation, even if it contains no data. And of course see size of Total storage, the Total Allocated (provisioned), AND exactly what has been ACTUALLY written to the that provisioned storage. Select the vCenter Server that is having the issue and click the Alarms tab. All our storage is thin provisioned (is there any Enterprise Array these days that does not use thin provisioning. Using the vSphere Client: Click Host and Clusters in the Home page. If the VM disks are not pointing to a snapshot disk, you can such snapshot delta disks out of the datastore to another datastore for now and delete it later. I am very familiar with our storage footprints. Expand the hard disks and check the disk where it is pointing to: Regular vmdk: VMname.vmdk and snapshot disk: VMname-00001.vmdk.
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