Short description of Linux (Ext2 Ext3) Data Recovery by Unistal 10.12: QR for Linux recover Ext2 and Ext3 data in case of hard disk crash , Linux search heuristics help locate partitions and folders quickly. GUI designed to have least user interaction. QR is a do-it-yourself non-destructive Linux Data Recovery Software. There are just two steps to perform the complete operation. Analysis, Select and Save. Analysis is the most important aspect of data recovery.