Why is your Information store compressed? I'm not sure, but I think your problem is not SP related, it's memory related. Since your information store is compressed (NTFS compression is enabled), Windows is trying to decompress it when you start Exchange. This is done by decompressing it to memory, so you need as much memory as the original, uncompressed size of the information store. Decompress your ExchSrvr folder, and you can keep the SP. Regards Andy -----Original Message----- From: Mark Dewell [mailto:M.Dewell@xxxxxxxxx] Sent: 24 August 2002 11:50 AM To: [ExchangeList] Subject: [exchangelist] RE: Service pack 3 for Windows 2000 http://www.MSExchange.org/ I too am having problems with Exchange 2000 SP3. We have successfully updated a front end server and one of our back end servers (which has no live mailboxes on it - because it is intended as replacement for existing server and we have yet to migrate any users). I have just applied SP3 to a second back end server which has several live mail stores (some up to and now any attempt to mount the mail stores fails with error 505 "Information Store (1472) An attempt to open the compressed file "D:\Exchsrvr\West Ham Staff SG\West Ham SS Staff.edb" for read / write access failed because it could not be converted to a normal file. The open file operation will fail with error -4005 (0xfffff05b). To prevent this error in the future you can manually decompress the file and change the compression state of the containing folder to uncompressed. Writing to this file when it is compressed is not supported. " Any attempts to run ESEUTIL /P returns a 'JET_errFileCompressed' error. Checking the headers with ESEUTIL /MH shows both the .edb and .stm files were a clean shutdown Unless anyone has any suggestions, it looks like we will be rolling back to SP2 (which presumable means restoring the file system from tape - hopefully our mail stores will then mount without also needing a restore from tape). ---< Mark Dewell, University of East London, Dagenham, Essex, UK >--- ---< Email : M.Dewell@xxxxxxxxx >--- ---< URL : http://homepages.uel.ac.uk/1278 >--- < Practice random kindness and senseless acts of beauty (Anne Herbert) > ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: andreacoppini@xxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')