Hi, the problem is like this... After I hv restart the server (windows server 2003 SBE sp1), it prompt out this message - "At least one service or driver failed during system startup" b4 I log in into server.After I hv log in into the server , all data at drive D gone. (inside the drive D hv exhange server, sql server and application data)... when I click on drive D... it said the disk in drive D is not formatted and u need to format it or not.Is it many possibility to cause this problem? how do I check what is happend and how to solve it? I dun think it is the hardware issue. tqvm.

Hi, What I think has happened is something or someone has delete the drive. If it is an IDE or Sata drive you will have to use 3rd party Undelete software to get the info off the drive to another backup drive. Once you have recovered the data. Assuming the harddisk is not faulty, reformat it and replace the data from backup. Slan go foill, Paul

Before we go and restore, can we do some tests first ?open command prompt and type "DISKPART"A diskpart prompt appearson the diskpart prompt type "list disk" (please post back to us)on the diskpart prompt type "select disk X" (where X is the problem disk)on the diskpart prompt type "detail disk" (this will list disk details, please post back to us)on the diskpart prompt type "list volume" (please post back to us)on the diskpart prompt type "select vol X" (where X is the problem volume)on the diskpart prompt type "detail volume" (this will list the volume details, please post back to us)so, the output of 4 of the above commands we would like to see rgds,edwin.

It is a SCSI drive, may be is something has delete the drive but not someone, because at that drive has running the exchange (email) and application.I have also check the harddisk, all drives are healty. By The way, all the data have restore back via backup tape and DVD already, because the server cannot down too long and just need to back date the data to a week earlier or a day only, thanks.

Dear edwin,Sorry, I can't wait too long and have recover back the data via backup tape and DVD already. So I can't tests the command as u said. BTW thanks a lot.

Fair enough, do if you are forced.Just for your information, a volume can have a "hidden" bit, which will expose the same symptomby simply flipping this bit off, may be your data was still all there !Just saying that sometimes you do not have to do a full restore, if you get all factsThen again, may be you do.Good Luck with your restorergds,Edwin.