Welcome to the Community - I believe the problem is you do not have the appropriate driver available for the virtual disk controller -
Edit the following hardware settings:
a. Ensure that there is a floppy drive present.
b. Configure the floppy drive to connect at power on.
c. If using a floppy image, ensure that the device type is set to use a floppy image and is pointing
to the LSI Driver image.
d. Check that the CD/DVD drive is present and configured to connect at power on.
e. Configure the CD/DVD device type to point to the Windows XP CD or ISO image.
After you complete the preinstallation preparation and modifications, you can install Windows XP:
1. From the vSphere Client, connect to vCenter.
2. Power on the virtual machine created earlier.
3. Use the console to view the boot process and to send input to the virtual machine.
4. As the Windows setup process begins, press F6 to add another SCSI driver. This lets you specify the
LSI Logic driver on the floppy image.