Allocating Disk Space for Mirrored Data

Before you can create a mirror chunk, you must allocate disk space for this purpose. You can allocate either raw disk space or cooked file space for mirror chunks. For a discussion of allocating disk space, refer to Allocating Disk Space.

Always allocate disk space for a mirror chunk on a different disk than the corresponding primary chunk with, ideally, a different controller. This setup allows you to access the mirror chunk if the disk on which the primary chunk is located goes down, or vice versa.