Hi!<br>I´m receiving very Event 2000 from SRV messages in Event Viewer.<br>The description of the error message is:<br><br>The server's call to a system service failed unexpectedly. <br><br>The error data is:<br><br>0000: 00040000 00540001 00000000 c00007d0 <br>0010: 00000000 c0000054 00000000 00000000 <br>0020: 00000000 00000000 09b00bd3 <br><br>This error appears when the people log in the server, when all people starts to works or connects to Exchange.<br>(Exchange server is working in that server, and this server is a File Server too).<br><br>All this began when we changed in our Netfinity 5500 M10 with a PC ServeRAID adapter with an array (Level 5) of 4 disks, and the DLT-4000 (20/40) internal tape drive connected to a separated channel in the same controller.<br>The old unit was working fine, but a tape failed inside, and we had to change the unit.<br>But, after replacing the hardware,we didnt change anything, and the server started to crash while this errors appeared.<br><br>After upgrading all device drivers (SCSI, DLT, firmware and Service Pack to 6a) everything working fine, but the error message still appear.<br><br>The only difference between both DLT are the firmware.<br><br>How could i troubleshoot this ?<br><br>Thanks for your help<br>Gustavo Faza