Software Installation and User’s Guide181ICP RAID Navigator• migrate the RAID level of the selected RAID array drive(RAID 0 => RAID 4 and vice versa, RAID 0 => RAID 5 and vice versa) and/or• expand the capacity of the selected array drive by adding one or several new hard disks.Both functions can be selected at the same time. For example, migrate from RAID 0 toRAID 5 and add a new drive. To initiate a migration or expansion with a RAID 4/5 arraydrive, the state must be ready. The data on the array drive remain intact and are notaffected by the expansion. The additional capacity is introduced as a new host drive. If alogical drive fails during the expansion, the expansion process continues until theexpansion is finished. The array drive changes into the fail state. The new capacity isavailable as a new host drive. Windows NT (Tool: Disk Administrator) and NovellNetWare (“Scan for new Devices” and then Tool: Install) allow the online integration ofnew disk capacity. Depending on the RAID level the current array drive has, selecting adifferent one will cause the Migration of the RAID level of the array drive. If you selectthe same RAID level, the following procedure will expand the capacity of the array driveonly.Figure 11-143. Logical ConfigurationIf you want to add additional drives to the array drive, select them from the box on the leftside of the window. It is possible to add more than one drive at a time.If no physical drives are offered, you have to use the Hot Plug: Add Disk function first, toadd new drives. You can open the progress information window to monitor the progress ofthe expansion. If you have previously limited the capacity of the array drive, you areasked if you want to convert this free space to a new host drive.Caution: Before starting an expansion it is absolutely necessary to back up all data on thesystem. If the expansion process includes a new, unknown hard disk and there areproblems with this disk or with the cabling of this disk, then there is a risk of data
