Adaptec 2074700-R User Guide - Page 134
Add RAID 1 Component
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ICP RAID Console Figure 10-85. Expand Popup Window The Expand popup window contains three major functions: Function Description Use free Logical Conversion of free space on the logical drives into a separate host Drive space drive. Change RAID Type Migration of the RAID level of an array drive. RAID 0 to RAID 4 and vice versa RAID 0 to RAID 5 and vice versa Add hard disk to array Expansion of the capacity of an array drive. Note: If the entire hard disk capacity is not used when configuring a RAID 1 host drive, you cannot use the remaining capacity to expand the array drive in the future. Note: If ICPCON is closed, migration of the RAID level may not complete. To migrate or expand an array drive, the state must be ready. The data on the array drive remains intact and is not affected by the expansion. Warning: When starting an expand process, the unused capacity of the current array components (i.e. "Use free Logical Drive space") is activated and the drive enters a build state. At this point the array is put in the non-redundant build process, so it is very important to create a full backup before you start this process. If during the build process a disk fails, then the array changes to idle = not functioning, and the expansion process continues until the array drive enters the fail state. Add RAID 1 Component The Add RAID 1 Component option allows you to add, to a logical drive which is member of an array drive, another logical drive as a mirror drive (RAID 1). To access this function, from the Advanced Setup menu: • Select the Configure Array Drives option and press Enter to display the Select Array Drive screen. • Select an array drive and press Enter to display the Array Drive window. • Select the Add RAID 1 Component option and press Enter. Example: You have configured an array drive with 4 logical drives. One logical drive has failed and the array drive has gone into the fail state. Another failure would cause data loss. Unfortunately, you find another logical drive which is likely to fail (for example, you hear a strange noise coming from it, or its grown defect counter explodes). If you initiate a hot plug, it is very likely that this critical logical drive will also fail, resulting in data loss. To avoid this problem, mirror a new, good logical drive to the critical one. When the 134 Software Installation and User's Guide