We have an Oracle database running on a Win2K Adv server in an NT4 domain, with the database files on a FAS940. The database is in a dedicated QTree on a dedicated volume. The server and filer are directly connected via a crossover GbE connection. Occasionally, the database will go down with a series of Oracle events listed below. Nothing abnormal shows up in the Windows Event logs or the filer's messages. na_gb (gigabit connection to the NetApp) is entered in the local HOST file and LHMOSTS file. The LMHOSTS file uses the #PRE statement to preload this and keep it in the NetBIOS cache. Any ideas what can be causing this? ------------------------------------------------ ORA-00206: error in writing (block 3, # blocks 1) of controlfile ORA-00202: controlfile: '\NA_GB\RFMT$\CONTROL2\RFMTCONTROL02.CTL' ORA-27072: skgfdisp: I/O error OSD-04008: WriteFile() failure, unable to write to file O/S-Error: (OS 64) The specified network name is no longer available.