HP 411508-B21 RAID 6 with HP Advanced Data Guarding technology: a cost-effecti
HP 411508-B21 - Smart Array E200/128 BBWC Controller RAID Manual
UPC - 882780380486
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HP 411508-B21 manual content summary:
- HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 1
RAID 6 with HP Advanced Data Guarding technology: a cost-effective, fault-tolerant solution technology brief Abstract...2 Introduction...2 Functions and limitations of RAID schemes 3 Fault tolerance of RAID schemes ...5 Cost- - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 2
storage capacity, and high performance. Organizations implementing a large storage array should consider an HP RAID 6 solution because it can tolerate up to two simultaneous meet all the needs of their specific computing environment. 1 RAID is an acronym for redundant array of independent disks. 2 - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 3
the equivalent capacity of two physical drives. RAID 6 protects against the simultaneous failure of two drives in the array. 2 Striping is the distribution of data over multiple disk drives to improve performance. Data is interleaved in groups of sectors known as "stripes" across the drives. 3 - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 4
Table 1. Summary of RAID technologies for large arrays RAID LEVELS RAID 0 Requires a minimum of one drive. RAID 1 Requires a minimum of two drives. Function/Applications Data is distributed across separate disk drives. Image Editing • Video Production • Pre-Press Applications Mirroring - - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 5
array containing the maximum number of drives supported by a variety of Smart Array Controllers. Controller specifications are available online from this web page: www.hp RAID 1 or RAID 5, refer to the HP Smart Array 6400 Series Controller Support Guide, http://docs.hp.com/en/J6369-90011/index.html 5 - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 6
Figure 1. Failure probability for logical drives with four RAID levels and varying numbers of drives in the array 6 - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 7
to 93 percent for 14 drives (the maximum recommended by HP). The storage efficiency of RAID 6 varies from 50 percent for four drives to 96 percent for specific storage systems. The maximum number of physical drives that each HP Smart Array controller can support is identified on this web page: www - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 8
% *HP recommends not exceeding these maximum figures (excluding any allowable online spares) when configuring a drive array, due to the increased likelihood of drive array failure if access multiple disks simultaneously. Parallelism allows data to be written to or read from a RAID array faster than - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 9
solution for a specific computing environment. Summary RAID 6 with HP's patented Advanced Data arrays and when performance is not an overriding factor. RAID 6 can effectively protect an array of up to the maximum number of drives supported by a variety of Smart Array Controllers. A RAID 6 array - HP 411508-B21 | RAID 6 with HP Advanced Data Guarding technology: a cost-effecti - Page 10
, please send comments about this paper to: [email protected]. © 2002, 2005 Hewlett-Packard Development Company HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP
RAID 6 with HP Advanced Data Guarding technology:
a cost-effective, fault-tolerant solution
technology brief
Abstract
..............................................................................................................................................
2
Introduction
.........................................................................................................................................
2
Functions and limitations of RAID schemes
..............................................................................................
3
Fault tolerance of RAID schemes
............................................................................................................
5
Cost-effectiveness of RAID schemes
........................................................................................................
7
Performance of RAID schemes
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8
Choosing a RAID level
.........................................................................................................................
9
Summary
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9
Call to action
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10