HP ProLiant 1500 SMART-2DH Array Controller Reference Guide - Page 151

D-18 Understanding Drive Arrays Original Logical Drive Added Physical Drives Data from original logical drive redistributed over "Top" of all physical drives. New logical drive created over "Bottom" of all physical drives. Daz-9-14.EPS D-11. Expanded array storage capacity with a second logical drive Example: Assume you have two ProLiant Storage Systems with a total of 10 drives and you want to expand this to the 14-drive maximum supported by one SMART-2DH Controller. With Array Configuration Utility running, simply install four matching drives in the empty drive bays. At this point your array will resemble Figure D-10, with the original data (original logical drive) represented by the gray shaded drives and the new drives unshaded. Execute the Array Configuration Utility, which is located on the Compaq SmartStart and Support Software CD, to start the expansion process as described in Chapter 5. The SMART-2DH Controller will then redistribute the data to an equal portion of all the drives, using the same fault tolerance method used originally. This is still the first logical drive, but it now spans 14 drives instead of 10. Array Configuration Utility also detects the unused space on each drive (because each drive contains 10/14ths of the data that it used to) and helps you configure it into a second logical drive with its own fault tolerance, distributed over the extra space of all the drives. When this process is finished both logical drives, one containing the original data and the new empty one, will be configured into a single array with more total capacity than the original one. Now your array will look more like Figure D-11, using the same shading scheme to represent the logical drives. Writer: Pamela King Project: SMART-2DH Array Controller Reference Guide Comments: 295469-002 File Name: K-APPD.DOC Last Saved On: 2/27/98 12:06 PM COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED