Hi , Have a strange one here... We have Exchange 2003 running on 2 server in a cluster : server A holds the exchange roles and cluster groups Server B holds a huge data drive that holds PST files Both servers attach to a fibre channel SAN for the drives We are getting the Data drive reporting that no space is available when their is 21 GB available. When I fail the data drive to server A the drive appears and shows the full 21 GB free and all is well again. If I fail back the drive will also be fine. It is reporting no space randomly. Against my better judgment the Drive was compressed quite a while ago but then more space was added from the free space available on the SAN. Not sure if this last piece of info is relevant. Any ideas were to even start as there doesn't seem to be any information in the event logs. thanks in advance Ronnie Visit our website : www.ltai.ie __________________________________________ Lufthansa Technik Airmotive Ireland Limited. Registered in Ireland. Reg. No. 45999. Registered Office: Naas Road, Rathcoole, Co.Dublin. Lufthansa Technik Airmotive Ireland Leasing Limited. Registered in Ireland. Reg. No. 140891. Registered Office: Naas Road, Rathcoole, Co.Dublin. __________________________________________ The information in this email and in any attachments is confidential and may be privileged. If you are not the intended recipient, please destroy this message, delete any copies held on your systems and notify the sender by return email. You should not read, retain, copy, disseminate, distribute, disclose or use this email or its contents in any way. Any such action is strictly prohibited. Thank you.