Exchange has two major uses for files. 1] Transaction logs - these are written (always!) in linear sequential order. 2] Message databases - these are accessed (always!) in a completely random order. Therefore, the usage patterns on the volumes containing transaction logs and message databases are completely different. If you try to use them both on the same physical volume - then performance is significantly decreased. Now, all that being said - if you currently only have a 15 GB Exchange database, I would guess your user population is quite small. Any modern system should be able to handle that - even in non-optimal situations - pretty easily. From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Todd Lemmiksoo Sent: Wednesday, October 24, 2007 5:55 PM To: 'exchangelist@xxxxxxxxxxxxx' Subject: [ExchangeList] Re: Exchange 2003 disk partition'g question OK, my bad. The server has 4 73 Gb drives in two raid 1 sets. The first set has the OS and user files partitions. The second set is for Exchange. Todd L. ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of John T (lists) Sent: Wednesday, October 24, 2007 5:35 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Exchange 2003 disk partition'g question For an Exchange server, recommendation is minimum 4 physical drives in 2 RAID1 sets. First RAID1 set: OS partition, Page file partition, Logs partition Second RAID1 set: Exchange DB partition, Backup partition John T From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Todd Lemmiksoo Sent: Wednesday, October 24, 2007 2:23 PM To: 'exchangelist@xxxxxxxxxxxxx' Subject: [ExchangeList] Re: Exchange 2003 disk partition'g question Yes, raid 1 = 2 physical drives. ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Michael B. Smith Sent: Wednesday, October 24, 2007 4:40 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Re: Exchange 2003 disk partition'g question You have a SINGLE 73 GB drive? From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Todd Lemmiksoo Sent: Wednesday, October 24, 2007 4:22 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange 2003 disk partition'g question I will be migrating my Exchange 5.5 org to Exchange 2003 in the near future. (Thanksgiving weekend) And am asking for disk drive partitioning suggestions. Our current Exchange org is taking about 15 Gb of disk space on an NT4 server. I have a 73 Gb drive that I am planning on using for the Exchange 2003 setup. What size partitions should I build for the migration? Todd Lemmiksoo Network Administrator All-Mode Communications, Inc. 1725 Dryden Road Freeville, New York 13068 (607) 347-4164 x440 1-877-ALLMODE (toll free) http://www.all-mode.com <http://www.all-mode.com>