We rebooted our Windows 2000 server last night and when it came back up it said Operating system not found. I tried for about three hours trying everything I knew of the recovery console, nothing was working. The server was rebooted after changing our a SCSI card for a tape drive because the drive was performing too slow. So maybe it's an issue with SCSI, but I can't figure it out. When I go into recovery console it sees the installation and I can select it and log into it, however when I try to get Windows Setup to see it for an "In place upgrade" it just sees the drive formatted with NTFS, it doesn't say that there is already an installation there like it should. What I really don't get is why the recovery console can see it and let me log into it with the administrator password, but I can not boot to it, nor can I see it in the repair installation in setup. (Not that I really want to try a reinstall, but I would think it should at least notice that there was an install there if recovery console can see it.) Please let me know what else I can do on this matter as I am going back into work in a little bit to see if I can figure this out. Thanks.