Dell™ PowerEdge™ Expandable RAID Controller 5/i ... - Dell Support

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Disk mirroring provides 100 percent redundancy, but is expensive because each physical disk in the system must be duplicated. Figure 1-2 shows an example of disk mirroring. NOTE: Mirrored physical disks improve read performance by read load balance. Figure 1-2. Example of Disk Mirroring (RAID 1) Stripe element 1 Stripe element 2 Stripe element 3 Parity Parity creates a set of redundant data from two or more parent data sets. You can use the redundant data to rebuild one of the parent data sets. Parity data does not fully duplicate the parent data sets but that data can be used to reconstruct the data if lost. In RAID, this method is applied to entire physical disks or stripes across all the physical disks in a physical disk group. The parity data is distributed across all the physical disks in the system. If a single physical disk fails, it can be rebuilt from the parity and the data on the remaining physical disks. RAID level 5 combines distributed parity with disk striping, as shown in Figure 1-3. Parity provides redundancy for one physical disk failure without duplicating the contents of entire physical disks. However, parity generation can slow the write process. Figure 1-3. Example of Distributed Parity (RAID 5) NOTE: Parity is distributed across multiple physical disks in the disk group. 14 Overview Stripe element 1 Duplicated Stripe element 2 Duplicated Stripe element 3 Duplicated Stripe element 4 Stripe element 4 Duplicated Segment 1 Segment 7 Segment 13 Segment 19 Segment 25 Parity (26–30) Segment 2 Segment 8 Segment 14 Segment 20 Parity (21–25) Segment 3 Segment 9 Note: Parity is distributed across all drives in the array. Segment 4 Segment 10 Parity (11–15) Segment 16 Segment 22 Segment 5 Parity (6–10) Segment 15 Segment 11 Parity (16–20) Segment 17 Segment 21 Segment 23 Segment 26 Segment 27 Segment 28 Segment 29 Parity (1–5) Segment 6 Segment 12 Segment 18 Segment 24 Segment 30
PERC 5 Features This section describes the features of the The Dell PowerEdge Expandable RAID Controller (PERC) 5 family of controllers, such as the configuration options, disk array performance, hardware specifications, redundant array of independent disks (RAID) management utilities, and operating system software drivers. PERC 5 Controller Features This section describes the hardware configuration features for the PERC 5 controllers. Table 2-1 compares the configurations for the controllers. Table 2-1. PERC 5 Controller Comparisons Specification PERC 5/E Adapter PERC 5/i Adapter PERC 5/i Integrated RAID Levels 0, 1, 5, 10, 50 0, 1, 5, 10, 50 0, 1, 5, 10, 50 Enclosures per Port Up to 3 enclosures N/A N/A Ports 2 x4 external wide port 2 x4 internal wide port 2 x4 internal wide port Processor Intel ® IOP333 I/O Intel IOP333 I/O Intel IOP333 I/O processor with Intel processor with Intel processor with Intel XScale Technology XScale Technology XScale Technology Battery Backup Unit Yes, Transportable Yes a Yes Cache Memory 256 MB DDR2 cache 256 MB DDR2 cache 256 MB DDR2 cache memory size memory size memory size Cache Function Write-back, write- Write-back, write- Write-back, writethrough, adaptive through, adaptive through, adaptive read ahead, non-read read ahead, non-read read ahead, non-read ahead, read ahead ahead, read ahead ahead, read ahead Maximum Number of Drives per Array Up to 32 drives per array Up to 32 drives per array Up to 32 drives per array Maximum Number of Up to 8 arrays (in a Up to 8 arrays (in a Up to 8 arrays (in a Arrays per Disk Group spanned configuration) spanned configuration) spanned configuration) PERC 5 Features 15
Page 1: Dell PowerEdge Expandable Model UCP
Page 4 and 5: Notes, Notices, and Cautions NOTE:
Page 6 and 7: 4 Contents Battery Management. . .
Page 8 and 9: 6 Contents BIOS Configuration Utili
Page 10 and 11: 8 Contents
Page 12 and 13: In addition, take note of these saf
Page 14 and 15: PCI Architecture PERC 5 controllers
Page 18 and 19: Table 2-1. PERC 5 Controller Compar
Page 20 and 21: Disk Roaming The PERC 5 controllers
Page 22 and 23: Conditions Under Which Write-Back i
Page 24 and 25: Physical Disk Hot Swapping Hot swap
Page 26 and 27: 24 PERC 5 Features
Page 28 and 29: Figure 3-1. Installing a PERC 5/E A
Page 30 and 31: Figure 3-3. Installing a TBBU memor
Page 32 and 33: Transferring a TBBU Between Control
Page 34 and 35: Figure 3-6. PERC 5/E Adapter Dirty
Page 36 and 37: 5 Align the PERC 5/i Adapter to the
Page 38 and 39: 3 Determine whether the dirty cache
Page 40 and 41: Disconnecting the BBU from a PERC 5
Page 42 and 43: Installing the Driver During a Micr
Page 44 and 45: Installing Windows Vista for a New
Page 46 and 47: Creating a Driver Update Diskette P
Page 48 and 49: DUD Creation Procedure Perform the
Page 50 and 51: 48 Driver Installation
Page 52 and 53: The following sections will help yo
Page 54 and 55: Table 5-1. Menu Navigation Keys (co
Page 56 and 57: Virtual Disk Management (VD Mgmt) T
Page 58 and 59: Virtual Disk Actions Table 5-3 desc
Page 60 and 61: Table 5-5. Controller Management Op
Page 62 and 63: Creating Virtual Disks NOTE: PERC 5
Page 64 and 65: Importing or Clearing Foreign Confi
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Setting LED Blinking The LED blinki
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Enabling the Alarm to Alert in Case
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3 Press . The action menu appears.
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3 Use the spacebar to deselect the
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General Problems Table 6-1 describe
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Table 6-3. Physical Disk Failure an
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Table 6-5. BIOS Errors and Warnings
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Red Hat Enterprise Linux Operating
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Table 6-8 lists the critical and wa
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A Notice about Shielded Signal Cabl
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CE Notice (European Union) CE Notic
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86 Appendix: Regulatory Notices
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MIC Notice (Republic of Korea Only)
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CNCA (China Only) CNCA, Class A 94
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software monitors the addresses of
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F Failed Physical Disk A physical d
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Online Capacity Expansion Operation
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Read-Ahead A memory caching capabil
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Striping Disk striping writes data
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M manual rebuild, 67 O operating sy
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Dell™ PowerEdge™ Expandable RAID Controller 5/i ... - Dell Support

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