Scan and Detect a new disk added from VMware to a Linux VM.

Scan and Detect a new disk added from VMware to a Linux VM

1. Before scanning a VMware SCSI disk, make a note of an already available disks on the server with "fdisk -l" command and the LUN ids from "cat /proc/scsi/scsi" file.

 2. Check how many scsi hostid's present in "ls -l /sys/class/scsi_host". I had only one scsi hostid (host0) present in the server as below,

3. Now lets scan and detect the VMware Scsi disk assigned to this server with the below command,

echo "- - -" > /sys/class/scsi_host/hostx/scan - where x is the hostid from the "ls -l /sys/class/scsi_host" output.

Had executed the below since i had only one hostid "host0".

echo "- - -" > /sys/class/scsi_host/host0/scan

4. For the servers who have more scsi host id's, execute the below forloop script to scan the new disks.

"for a in `ls /sys/class/scsi_host`; do echo $a; echo "- - -" > /sys/class/scsi_host/$a/scan; done"

5. Now verify the new disk on the server with "fdisk -l" command and the LUN ids from "cat /proc/scsi/scsi" file.

6. At next we will format the new disks in Linux LVM and create a FileSystem.