Hello T Yes, as long as they are the same type(SAS, SATA), and the replacement drives are the same size or larger than the smallest drive in the array. After you rebuild the new drives into the array the size of the array will be the same. It will still be a 140GB array. You can expand the array using OpenManage Server Administrator to include all of this new space, or you can create a second array across the drives. After you do one of those two things you will need to expand or create new partitions within the operating system to use the space. To use OMSA to expand the array capacity select the reconfigure option within the task list of the array. If there is available space on the drive it will give you the option to "Expand Capacity". It will be a button at the bottom of the first page on the wizard. Thanks
So 2 140GB drives, mirrored on a PERC7 controller. If I remove the secondary 140Gb mirrored drive and install an new, faster 1TB drive, will it re-mirror?  Thus allowing me to then, remove the second 140GB drive and run on the 1TB drive, then re-mirroring a second 1TB drive? Like a cascade. "Waltz them out the door." My understanding is that YES, as long as the new drive is the same interface (SAS in this case) and is just as quick and larger than the source drive. Cheers, T
PERC7 controller with 2 140GB drives migrate to 1TB drives.