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Vmware Linux Guest Add a New Hard Disk Without Rebooting Guest
As a system admin, I need to use additional hard drives for to provide more storage space or to separate system data from user data. This procedure, adding physical block devices to virtualized guests, describes how to add a hard drive on the host to a virtualized guest using VMWare software running Linux as guest.
It is possible to add or remove a SCSI device explicitly, or to re-scan an entire SCSI bus without rebooting a running Linux VM guest. This how to is tested under Vmware Server and Vmware Workstation v6.0 (but should work with older version too). All instructions are tested on RHEL, Fedora, CentOS and Ubuntu Linux guest / hosts operating systems.
Step # 1: Add a New Disk To Vm Guest
First, you need to add hard disk by visiting vmware hardware settings menu.
Click on VM > Settings
Fig.01: Vmware Virtual Machine Settings
Alternatively you can press CTRL + D to bring settings dialog box.
Click on Add+ to add new hardware to guest:
Fig.02: VMWare adding a new hardware
Select hardware type Hard disk and click on Next
Fig.03 VMware Adding a new disk wizard
Select create a new virtual disk and click on Next
Fig.04: Vmware Wizard Disk
Set virtual disk type to SCSI and click on Next
Fig.05: Vmware Virtual Disk
Set maximum disk size as per your requirements and click on Next
Fig.06: Finalizing Disk Virtual Addition
Finally, set file location and click on Finish.
Step # 2: Rescan the SCSI Bus to Add a SCSI Device Without rebooting the VM
A rescan can be issued by typing the following command:echo "- - -" > /sys/class/scsi_host/host#/scan
fdisk -l
tail -f /var/log/message
Sample outputs:
Fig.01:Linux Vmware Rescan New Scsi Disk Without Reboot
Replace host# with actual value such as host0. You can find scsi_host value using the following command:
# ls /sys/class/scsi_host
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