I was just wondering what configurations and the reason behind them to all you fellow admins out there. I'm just looking for mainly how others setup the storage array on different servers. This might come in handy to others reading this thread as well. Well I will start with how I configure a DC: 6HDD's 2 each in a RAID1 (Mirror) I then create a single partition on each RAID array as follows SYS, DATA and LOG partition. SYS holds the OS and swap file, DATA holds the SYSVOL and AD Database, and last LOG holds the AD logs. This is done becuase each one has there unique access to the drive like LOG would tend to be written to more than read and DATA would be read more than written to and SYS would probably be read more than written to as well. For an SQL server I configure as such: 6HDD's 2 RAID1 and 4 RAID5 with a SYS, APP and DATA partition SYS and APP would both be on the RAID1 array and contain the OS on 1 partition and the remainder of the drive to the APP partition where SQL would be installed and then the databases being installed to the DATA partition on the DATA RAID5 array this is done so i can loose a single drive in the array without loosing the data is faster than mirroring and safer than striping as the loss of one drive you lose everything. For Exchange I configure as such: 6HDD's 2 in RAID1, the next 2 in RAID1 and the last 2 in RAID0 I create a SYS, APP, DATA and LOG partition I create the SYS and APP partition on the first RAID1 array and install the OS on SYS and Exchange on APP, then i move the log files to the second RAID1 array where I have created a LOG partition and then the mailbox and public stores to the RAID0 array in the DATA partition I choose a RAID0 array as the logs are mirrored in an event i loose the stripe and have to rebuild from the logs and it was also chosen do to it's speed over RAID1 where I have a mix and read/write going on on the RAID0 array. So how do you setup things and why?