I am running Windows 2000 Server SP4 on a Proliant ML350. I have always backed up my critical data using Retrospect when suddenly, I started getting delayed write.. errors with Event Id 51 followed by Event ID 11 (lots of them) in the System Log. Apparently the external USB drive I am backing up to was failing. I replaced the drive with a brand new external drive and the same thing happens. I continue to get these errors regardless of the USB external drive I use. This problem even occurs using NTBACKUP. The only way I can bring up the USB drive after the failure is to eject it, power down the device and power back up. Even then, the USB drive MAY or MAY NOT be corrupt. About half the time the USB drive is corrupt and requires reformatting. I dont want to mess with the system in fear of losing EVERYTHING, yet I am in a real bind, as I cannot back up any of my data. PLEASE HELP!!