Yesterday I installed OS Selector to manage my 3 Windows systems, and it proved to be a big mistake. Here are the details: Before HDD1:74G SATA1 with partition CDEF,LBA mode HDD2:250G SATA2 with partition IJK, LBA mode HDD3:320G SATA2 with partition GH, CHS mode Partition C,D are FAT32,others are NTFS WinXP 1 installed on C, Win2000 installed on E, WinXP 2 installed on I After reboot, I chose to boot WinXP 1 with OS Selector and noticed HDD3 not recorgnized. I thought it would be all right when fully booted but I thought wrong. HDD3 could not be recorgnized, and changed to LBA mode. I managed to recover partition G by Acronis*Recovery Expert but partition H, which keeps my home videos and backups, has gone. Recovery Expert could not find any partition records. Recover My Files is doing a thorough scan and even all data can be recovered, it will take a long time. Is there a possibility that I can recover the lost partition without data loss? Suggestions appreciated.