In the Virtual device node section, you can select which SCSI or IDE device identifier to use for the drive. For example, if you select SCSI 0:2, the guest operating system sees the drive as ID 2 on controller 0. You determine whether the virtual disk is seen as a SCSI device or as an IDE device at the time you create it.
The default, normal mode is to include disks in any snapshots you take. You can change this behavior, however. In the
Mode section, if you select the
Independent check box, the data on the disk is not recorded when you take a snapshot of the virtual machine. If the
Independent check box is unavailable, it might mean that the virtual machine currently has snapshots. After you delete the snapshots, the check box becomes available.
When write caching is enabled, there is a delay between the time the program saves data and the time that data is actually written to disk. This improves performance, but the delay in writing data to disk adds some risk of data loss. If data integrity is more important than performance, you might want to disable write caching.
