Compaq ProLiant 5000 SMART-2DH Array Controller Reference Guide - Page 152
Online Capacity Expansion, In certain cases, the SMART-2DH Controller and Array Configuration Utility
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D-19 It is not necessary for all logical drives in an array to be the same size or even have the same fault-tolerant configuration. Each logical drive is treated as a separate entity no matter how many physical drives it crosses. Each may be configured as best suits your needs. It is important to remember that all physical drives in an array should be the same size (capacity). This is because each drive contains an equal portion of one or more logical drives and the portion sizes can only total the size of the smallest drive. While you are not prevented from expanding storage capacity with larger drives, the extra space cannot be used. During expansion of an array that initially has two or more logical drives, the redistribution of data takes place one logical drive at a time. When the capacity expansion has completed, any newly created logical drive will become available. Under NT and NetWare, the new logical drive can then be appended to your existing logical volume. Online Capacity Expansion In certain cases, the SMART-2DH Controller and Array Configuration Utility also support making storage capacity changes online, without downing the server or storage system. These cases are: s Windows NT or NetWare operating system (NetWare 3.11 not supported) and s Hot-Pluggable drives Because the Array Configuration Utility reconfigures the SMART-2DH Controller, online reconfiguration can only take place if Array Configuration Utility is running in the same environment as the normal server applications. The Array Configuration Utility is available in Windows NT or NetWare versions.(NetWare 3.11 is not supported.) Hot-pluggable drives are required for online storage changes because non-hot-pluggable drives require that the server be powered down to add or remove the drive. All ProLiant Servers and Storage Systems support hot-pluggable drives. SMART-2DH Array Controller Reference Guide 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