Match Linux SCSI Devices (sdX) to Virtual Disks in VMware

To determine the SCSI ID from device names enter ls -d /sys/block/sd*/device/scsi_device/*

debian02:~ # ls -d /sys/block/sd*/device/scsi_device/*
/sys/block/sda/device/scsi_device/0:0:0:0 /sys/block/sde/device/scsi_device/0:0:4:0 /s
/sys/block/sdb/device/scsi_device/0:0:1:0 /sys/block/sdf/device/scsi_device/0:0:5:0 /s
/sys/block/sdc/device/scsi_device/0:0:2:0 /sys/block/sdg/device/scsi_device/0:0:6:0 /s
/sys/block/sdd/device/scsi_device/0:0:3:0 /sys/block/sdh/device/scsi_device/0:0:8:0 /s
debian02:~ #

You can see the the device name, and 4 numbers a:b:c:d

a = Hostadapter ID
b = SCSI channel
c = Device ID
d = LUN

The Device ID is always c. At the controller, it depends whether you are using the Paravirtual (b) controller, or the LSI Logic (a) controller.

On the VMware it looks like that:


/dev/sda has the SCSI ID 0:0:0:0 which is the equivalent to 0:0 and is Hard Disk 1 on VMware.
/dev/sde has the SCSI ID 0:0:4:0 which is the equivalent to 0:4 and is Hard Disk 5 on VMware.
/dev/sdo has the SCSI ID 0:0:15:0 which is the equivalent to 0:15 and is Hard Disk 16 on VMware.

When you remove and add disks, the order might change so always double check if you want to remove disks from a Virtual Machine.

Also you can use the following command if you want an output that is better to read:

debian02:~ # ls -d /sys/block/sd*/device/scsi_device/* |awk -F '[/]' '{print $4,"- SCSI",$7}'
sda - SCSI 0:0:0:0
sdb - SCSI 0:0:1:0
sdc - SCSI 0:0:2:0
sdd - SCSI 0:0:3:0
sde - SCSI 0:0:4:0
sdf - SCSI 0:0:5:0
sdg - SCSI 0:0:6:0
sdh - SCSI 0:0:8:0
sdi - SCSI 0:0:9:0
sdj - SCSI 0:0:10:0
sdk - SCSI 0:0:11:0
sdl - SCSI 0:0:12:0
sdm - SCSI 0:0:13:0
sdn - SCSI 0:0:14:0
sdo - SCSI 0:0:15:0
debian02:~ #

Install Open VMware Tools on CentOS 7

To install CentOS 7 in a virtual machine you can use either the standard CentOS distribution CD or the boot floppy/network method. The following installation instructions are for standard distribution CD.For Minimal install and Virtualization Host environments, Open VMware Tools is not available during installation. After CentOS 7 installation, to install Open VMware Tools, using root privileges, run the command:

root# yum install open-vm-tools