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Select the device

	Devices
	You can select either a physical disk or a logical volume as a part of a copy process. Physical disks correspond to the actual devices in the machine. Logical volumes are independent of the physical layout to a certain extent, and refer to the logical data segmentation. For example, you can have two different logical volumes (partitions) on the same physical disk. On the other hand, a software RAID or spanned volume spans across several physical disks. The logical volume must be properly mounted (i.e. working to a certain extent), otherwise you can't create a copy of it. Hence, if you are taking an image of the system for a later data recovery or for a forensic purpose, it is better to stick to physical disks (unless complex RAIDing is involved).

	Volume locking considerations
	Disk copying is the lengthily process. It is required that the drive content does not change during copying; otherwise, the resulting image will be inconsistent. To avoid data changes, the devices involved in process have to be "locked". Zlon exclusively "locks" the volume for its own use, so no other program can use the volume concurrently. The "lock" is associated with the volume (logical disk). If a physical disk is being copied, all the volumes it contains have to be locked. In case the physical disk holds a part of a composite volume (e.g. part of the software RAID or a stripe set), the entire composite volume is locked. There are cases when it is not possible to acquire a volume lock. These include Volumes which have open files or folders on them System volume (containing the "WINDOWS" folder) Volume containing the page file If there is a problem locking a volume, Zlon will display a warning message. You then can [Retry] Find the program using the volume and close it, then retry locking. [Abort] Retreat back one step and select another device. [Ignore] Continue without locking. Be advised that the image will be inconsistent and can't be used for backup purposes. However, the result is typically satisfactory for a subsequent data recovery.

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Zlon 1.0 Manual

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