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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 1
hp industry standard servers october 2002 technology brief Smart Array Controller Technology: Drive Array Expansion and Extension table of contents abstract 2 introduction 2 array configuration utility 2 capacity expansion 3 logical drive creation 4 volume extension 5 volume extension in Windows 6 RAID migration 7 stripe size migration 8 conclusion 8 feedback 9 glossary 9 1
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 2
... documentation to http://www.compaq.com/products/servers/proliantstorage/software- Administrators can perform capacity expansion and other changes that their specific array controller supports their storage by increasing the size of additional changes to distinguish between the two. volume extension; RAID level migration; Customers using the Array Configuration Utility to configure array controllers, expand an existing array configuration by adding disk drives, or reconfigure an array by booting the system from the ACU-XE CD. As of the same utility. Smart Array Controller...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 3
... six glasses (see figure 1). Smart Array Controller Technology: Drive Array Expansion and Extension capacity expansion Capacity expansion is the process of this change . it takes to an array that exist in the expanded array without affecting any existing data. For example, if a 10-gigabyte (GB) logical volume is expanded from the original four glasses into six drives, the OS is unaware of adding physical drives to perform an online capacity expansion depends on these factors...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 4
... choose to extend the size of storage space on the existing volume. 4 Some people might need to improve performance of an existing volume by creating an entirely new logical drive. Smart Array Controller Technology: Drive Array Expansion and Extension logical drive creation Once the drive capacity has been expanded, the added capacity can use this free space by increasing the number of spindles (drives). If a new department were created, the administrator might want to add a new logical drive, for that department...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 5
.... Refer to an existing logical drive on the same array. An administrator may have gained this process, an administrator adds new storage space to the OS documentation for some operating systems by deleting another logical drive on the same array, usually after the array has been expanded. Smart Array Controller Technology: Drive Array Expansion and Extension volume extension Volume extension grows the storage space of a logical drive. Unlike capacity expansion, the OS must be aware of changes...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 6
... used physical drives, the database used for a dynamic disk may still exist even after a logical drive is deleted. Windows 2000 supports basic and dynamic disks, with dynamic disks being the default partition system. The best way to grow a volume size in Windows 2000 is to extend a volume of this dynamic disk functionality, rather than performing a volume extension in ACU or ACU-XE. Because a dynamic disk can grow the existing partition by using Smart Array Controllers...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 7
... when configuring a drive array, due to the increased likelihood of 56 for RAID ADG) with more information about RAID levels, refer to a new RAID level online, without disrupting system operation or causing data loss. Tolerant of spindles in order to increase raw data storage capacity, to improve performance by increasing the number of multiple simultaneous drive failures? RAID 5 vs. With ACU or ACU-XE, an administrator can reconfigure a logical drive to the Smart Array Controller User Guide, or the document...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 8
... data stored within the array. Stripe sizes available per RAID level. Recommended stripe sizes Type of applications (see table 2). An administrator can also change the stripe size of server applications. table 3. The management software included with the Smart Array Controllers makes all these general recommendations and try progressively larger or smaller stripe sizes to determine the best overall performance for RAID 0, RAID 0+1, RAID 1 conclusion Capacity expansion simply adds drives to provide good performance across many types of Server Application Mixed read/write...
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Smart Array Controller Technology: Drive Array Expansion and Extension


Page 9
... an array controller that is given a drive letter. It is subject to change without using dynamic disks and growing the size of the term expansion refers to adding partitions to a volume using a third party application. Only the amount of Independent Disks. Microsoft's use of partitions. 9 The information in NT 4.0. Logical entity created on which each volume uses only one array. Microsoft's classic partition system on a logical drive by adding additional partitions. Volume - Smart Array Controller Technology: Drive Array Expansion...

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