HP ProLiant 1500 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

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D-19
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
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:
■
Windows NT or NetWare operating system (NetWare 3.11 not supported)
and
■
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.