Its possible to add a disk dynamically (without reboot) in a Linux host in Virtual Environment by following some simple steps in this article. In a Virtualized world there is a frequent requirement for adding extra disks/space on the fly, as and when required with "Downtime" being a BIG NO NO....

Once you have added a new disk using vSphere Client interface for the host, go ahead and scan the iSCSI Bus Channel.

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In Linux when you try to SSH it may at times give you this warning that REMOTE HOST IDENTIFICATION HAS CHANGED. It usually happens when the hostname or IP has changed of a host or the host was rebooted and generated a new fingerprint Key ID. No need to worry, it can be removed by a single command and you would be up and running in no time.

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