Dell MD3200, MD3220 owner manual Raid

Page 42

RAID 1

RAID 1 uses disk mirroring so that data written to one physical disk is simultaneously written to another physical disk. This RAID level offers fast performance, the best data availability, and the highest disk overhead. RAID 1 is recommended for small databases or other applications that do not require large capacity. RAID 1 provides full data redundancy. For example accounting, payroll, or financial applications.

RAID 5

RAID 5 uses parity and striping data across all physical disks (distributed parity) to provide high data throughput and data redundancy, especially for small random access. This is a versatile RAID level and is suited for multi-user environments where typical I/O size is small and there is a high proportion of read activity such as file, application, database, web, e-mail, news, and intranet servers.

RAID 6

RAID 6 is similar to RAID 5 but provides an additional parity disk for better redundancy. This is the most versatile RAID level and is suited for multi-user environments where typical I/O size is small and there is a high proportion of read activity. RAID 6 is recommended when large size physical disks are used or large number of physical disks are used in a disk group.

RAID 10

RAID 10, a combination of RAID 1 and RAID 0, uses disk striping across mirrored disks. It provides high data throughput and complete data redundancy. Utilizing an even number of physical disks (four or more) creates a RAID level 10 disk group and/or virtual disk. Because RAID levels 1 and 10 use disk mirroring, half of the capacity of the physical disks is utilized for mirroring. This leaves the remaining half of the physical disk capacity for actual storage. RAID 10 is automatically used when a RAID level of 1 is chosen with four or more physical disks. RAID 10 works well for medium- sized databases or any environment that requires high performance and fault tolerance and moderate-to-medium capacity.

42

Planning: MD3200 Series Storage Array Terms and Concepts

Image 42

Contents Dell PowerVault MD3200 and MD3220 Storage Arrays Page Contents RAID Controller Module Connectors Cache Functions and FeaturesVirtual Disk Operations Limit Configuring Alert Notifications Out-of-Band and In-Band ManagementEnabling or Disabling the Event Monitor Managing Host Port IdentifiersCreating Disk Groups and Virtual Disks Configuring Hot Spare Physical Disks Physical Disk Security with SelfHost-to-Virtual Disk Mapping 130 126129 131146 Creating a Snapshot Virtual Disk Using 142Creating a Snapshot Virtual Disk Using 151Types of Virtual Disk Copies 164 160161 165176 Using DM Multipathing Devices 180174 179202 Self-Monitoring Analysis and Reporting201 203218 RAID Controller Module Backup Battery Unit 214Power Supply/Cooling Fan Module 216 221233 Recovering From an Unresponsive Storage 241232 Collecting the Physical Disk Data 234Troubleshooting Expansion Enclosure Safety First-For you and Your Array 253Troubleshooting Power Supply/Cooling 254 Troubleshooting a Damaged Array 261Getting Help Contacting Dell Index Contents Introduction About This DocumentDell PowerVault Modular Disk Storage Manager Other Information you May NeedMD3200 Series Storage Array Introduction Introduction Planning About Your Storage Array OverviewHardware Features Front-Panel Features and IndicatorsPlanning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back Panel Features and Indicators Hard-Drive Indicator Patterns Hard Drive IndicatorsPower Supply and Cooling Fan Features Drive-Status Indicator Pattern ConditionPower Indicator Codes and Features Planning RAID Controller Modules RAID Controller ModulesRAID Controller Module Connectors and Features FunctionItem Component Function RAID Controller Module-Additional Features Battery Backup UnitComponent Function Shutdown Threshold Type System Password ResetStorage Array Thermal Shutdown Event DescriptionWrite-Back Cache Cache Functions and FeaturesCache Mirroring Write-Through CachePlanning MD3200 Series Storage Array Terms and Concepts Physical Disks, Virtual Disks, and Disk GroupsPhysical Disks Physical Disk StatesSelf-Monitoring Analysis and Reporting Technology Virtual Disks and Disk GroupsRAID Levels Virtual Disk StatesRAID Controller Virtual Disk States Description RAID Level Usage RAIDRAID Virtual Disk Initialization Segment SizeVirtual Disk Operations Background InitializationConsistency Check Media VerificationCycle Time RAID Level Migration Disk Group OperationsVirtual Disk Operations Limit Segment Size MigrationVirtual Disk Capacity Expansion Disk Group ExpansionRAID Background Operations Priority Disk Group DefragmentationDisk Group Operations Limit Virtual Disk Migration and Disk Roaming Disk MigrationPlanning MD3200 Series Storage Array Terms and Concepts Advanced Features Disk RoamingHost Server-to-Virtual Disk Mapping Host TypesSnapshot Virtual Disks Snapshot Repository Virtual Disk Virtual Disk Copy Source Virtual DiskTarget Virtual Disk Virtual Disk Recovery Using Snapshot and Disk Copy TogetherMulti-Path Software Preferred and Alternate Controllers and Paths Virtual Disk OwnershipLoad Balancing Monitoring MD3200 Series System Performance AMW, select Storage Array→ Monitor PerformanceClick Settings Performance Monitor Table Description Column Headings Planning MD3200 Series Storage Array Terms and Concepts Configuration Overview User InterfaceEnterprise Management Window Inheriting the System Settings Array Management WindowConfiguration Overview Configuration About Your Storage Array Out-of-Band and In-Band ManagementOut-of-Band Management Storage Arrays Adding Storage ArraysIn-Band Management Automatic Discovery of Storage Arrays Manual Addition of a Storage ArraySelect Edit→ Add Storage Array Setting Up Your Storage Array Locating Storage Arrays AMW, select Storage Array→ Blink→ Storage ArrayAMW Setup tab, select Rename Storage Array Naming or Renaming Storage ArraysName/Rename Storage Arrays dialog is displayed Setting a Password PasswordType the New password Password Guidelines Viewing Storage Array ConnectionsSelect Edit→ Comment Adding/Editing a Comment to an Existing Storage ArrayRemoving Storage Arrays Select Edit→ Remove→ Storage ArrayEnabling Premium Features Failover Alert DisplayChanging the Cache Settings on the Storage Array Changing Expansion Enclosure ID NumberChanging the Enclosure Order in the Physical Pane AMW, select Storage Array→ Change→ Enclosure Order Configuring Alert NotificationsSelect Configure Alerts Select All storage arraysConfiguring E-mail Alerts Configuration About Your Storage Array Configuring Snmp Alerts Configuration About Your Storage Array Battery Settings Setting the Storage Array RAID Controller Module Clocks Configuration Event Monitor Enabling or Disabling the Event Monitor WindowsLinux Configuration About Your Host Configuring Host AccessUsing the Mappings Tab Defining a HostSelect Mappings→ Define→ Host Configuration About Your Host Creating a Host Group Removing Host AccessManaging Host Groups Select Mappings→ RemoveRemoving a Host From a Host Group Moving a Host to a Different Host GroupAdding a Host to a Host Group Select Mappings→ MoveRemoving a Host Group Host TopologyStarting or Stopping the Host Context Agent LinuxWindows Data Path Protection Click Action→ StartManaging Host Port Identifiers Add Host Port Identifier dialog is displayedConfiguration About Your Host Configuration Disk Groups and Virtual Disks Creating Disk Groups and Virtual DisksCreating Disk Groups Introduction Create Disk Group window is displayedConfiguration Disk Groups and Virtual Disks Locating a Disk Group Creating Virtual DisksConfiguration Disk Groups and Virtual Disks Map later Using Mappings View Changing the Virtual Disk Modification Priority100 Changing the Virtual Disk Cache Settings 101102 Changing the Segment Size of a Virtual Disk 103Changing the I/O Type Select Virtual Disk→ Change→ Segment Size104 Choosing an Appropriate Physical Disk Type File system typical Database Multimedia Custom105 Physical Disk Security with Self Encrypting Disk 106Shows how to interpret the security status of a disk group 107Creating a Security Key 108Click Create Key 109Changing a Security Key Confirm Change Security Key window is displayed110 Saving a Security Key Click Change Key111 Validate Security Key 112Unlocking Secure Physical Disks Erasing Secure Physical Disks113 Configuring Hot Spare Physical Disks Select Physical disk→ Hot Spare Coverage114 Click Unassign Hot Spares and RebuildHot Spare Physical Disk Options window is displayed 115Hot Spare Drive Protection Global Hot SparesHot Spare Operation 116Enclosure Loss Protection 117118 Criteria for Enclosure Loss Protection RAID LevelHost-to-Virtual Disk Mapping Creating Host-to-Virtual Disk Mappings119 120 Modifying and Removing Host-to-Virtual Disk Mapping 121Select Virtual Disk→ Change→ Ownership/Preferred Path Changing Controller Ownership of the Virtual DiskRemoving Host-to-Virtual Disk Mapping 122Select Disk Group→ Change→ Ownership/Preferred Path 123Select Disk Group→ Change→ RAID Level Removing a Host-to-Virtual Disk Mapping Using Linux DmmpChanging the RAID Level of a Disk Group 124125 Restricted Mappings 126Operating System Highest LUN 127 128 Changing the RAID Level of a Disk Group 129Storage Partitioning 130Disk Group and Virtual Disk Expansion Select Disk Group→ Add Free Capacity Physical Disks131 Using Free Capacity Virtual Disk Expansion132 Export Disk Group Using Unconfigured CapacityDisk Group Migration Non-Exportable ComponentsImporting a Disk Group Import Disk GroupExporting a Disk Group 134Non-Importable Components 135Changing Media Scan Settings Storage Array Media Scan136 Suspending the Media Scan 137138 Configuration Premium Feature- Snapshot Virtual Disks 139Scheduling a Snapshot Virtual Disk Common Reasons for Scheduling a Snapshot Virtual Disk140 Guidelines for Creating Snapshot Schedules 141Scheduled Snapshot Icons Creating a Snapshot Virtual Disk Using the Simple PathEnabling and Disabling Snapshot Schedules 142About the Simple Path 143144 145 Creating a Snapshot Virtual Disk Using the Advanced Path About the Advanced Path146 147 148 Creating the Snapshot Using the Advanced Path 149Specify Virtual Disk Parameters window is displayed 150Specifying Snapshot Virtual Disk Names 151Snapshot Repository Capacity 152153 Click Add Physical Disks Add Physical Disks window closes154 Disabling a Snapshot Virtual Disk 155Preparing Host Servers to Re-create a Snapshot Virtual Disk 156Select Virtual Disk→ Snapshot→ Re-create Re-creating Snapshot Virtual DisksSnapshot Rollback 157Rules and Guidelines for Performing a Snapshot Rollback 158Previous Versions of the MD Storage Manager Command Line OptionsProtecting Against a Failed Snapshot Rollback Starting a Snapshot RollbackConfirm Rollback Snapshot Virtual Disk dialog is displayed Resuming a Snapshot RollbackRollback 160Canceling a Snapshot Rollback 161162 Configuration Premium Feature- Virtual Disk Copy 163Types of Virtual Disk Copies Offline Copy164 Online Copy 165Creating a Virtual Disk Copy for an Mscs Shared Disk Virtual Disk Read/Write Permissions166 Virtual Disk Copy Restrictions 167Creating a Virtual Disk Copy Before you Begin168 Failed Virtual Disk Copy Virtual Disk Copy and Modification OperationsCreate Copy Wizard 169Copy Manager Preferred RAID Controller Module OwnershipFailed RAID Controller Module 170Copying the Virtual Disk 171Storage Array Performance During Virtual Disk Copy 172Select Change→ Copy Priority Setting Copy PriorityStopping a Virtual Disk Copy 173Recopying a Virtual Disk Preparing Host Servers to Recopy a Virtual Disk174 Re-Copying a Virtual Disk 175Select Copy→ Remove Copy Pairs Removing Copy PairsSelect Copy→ Re-Copy 176177 178 Configuration Device Mapper Multipath for Linux 179Using DM Multipathing Devices Prerequisite Steps180 Device Mapper Configuration Steps Scan for Newly Added Virtual Disks181 182 Create a New fdisk Partition on a Multipath Device Node Add a New Partition to Device Mapper183 Ready for Use Create a File System on a Device Mapper PartitionMount a Device Mapper Partition Blacklist Local Drive in Multi-path DriverImportant Information About Special Partitions 185Device Mapper Commands Descriptions 186Limitations and Known Issues 187Troubleshooting 188Question Answer Downloading RAID Controller and Nvsram Packages 189Downloading Both RAID Controller and Nvsram Firmware 190Click Transfer 191Downloading Only Nvsram Firmware 192Select Tools→ Upgrade RAID Controller Module Firmware Upgrade RAID Controller Module Firmware window is displayed193 194 Downloading Physical Disk Firmware 195196 Download Environmental EMM Firmware dialog is displayed AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware 197Media Errors and Unreadable Sectors Self-Monitoring Analysis and Reporting Technology Smart198 199 200 Management Installing Array Components Recommended Tools201 Removing the Front Bezel Installing the Front BezelFront Bezel Optional 202Removing a Hard-Drive Blank Safety Models AMT, E03J, and E04JHard Drives 203Installing a Hard-Drive Blank Removing a Hard Drive204 Removing and Installing a Hard Drive 205Installing a Hard Drive 206Removing a Hard Drive From a Hard-Drive Carrier 207208 Removing a RAID Controller Module Blank Installing a Hard Drive Into a Hard-Drive CarrierRAID Controller Module 209Installing a RAID Controller Module Blank 210Removing a RAID Controller Module 211Installing a RAID Controller Module Opening the RAID Controller Module212 Closing the RAID Controller Module 213RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit214 Installing the RAID Controller Module Backup Battery Unit 215Power Supply/Cooling Fan Module Removing a Power Supply/Cooling Fan Module216 Installing a Power Supply/Cooling Fan Module 217Control Panel Removing the Control Panel218 219 Installing the Control Panel 220Backplane Removing the Backplane221 222 16. Removing and Installing the Backplane-PowerVault MD3200 17. Removing and Installing the Backplane-PowerVault MD3220Installing the Backplane 224Management Firmware Inventory Viewing the Firmware Inventory225 226 Volume Shadow-Copy Service Microsoft ServicesVirtual Disk Service Management System Interfaces228 Device Health Conditions Troubleshooting Your Storage Array SoftwareStart-Up Routine 229On the Setup tab, select Manage a Storage Array 230Status Icon Description 231 Additional Status Icons DescriptionStorage Array Support Data 232Automatically Collect the Support Bundle Data Enter the Execution summary233 Collecting the Physical Disk Data Event Log234 Recovery Guru 235Storage Array Profile Select Storage Array→ View→ Profile236 237 Viewing the Logical Associations Viewing the Physical Associations238 Finding Nodes 239Click Find Next Using Go ToSelect Find all free capacity nodes 240Recovering From an Unresponsive Storage Array Condition 241242 243 Locating a Physical Disk 244Locating an Expansion Enclosure Select Physical Disk→ Blink→ Expansion Enclosure245 Capturing the State Information 246SMrepassist Utility 247Recovering From an Unidentified Storage Array Unidentified Devices248 249 250 Starting or Restarting the Host Context Agent Software 251252 Troubleshooting External Connections Troubleshooting Your ArrayTroubleshooting Loss of Communication 253Troubleshooting Power Supply/Cooling Fan Module 254Troubleshooting Array Cooling Problems Troubleshooting Expansion Enclosure Management Modules255 Troubleshooting RAID Controller Modules 256257 Troubleshooting Hard Drives 258Troubleshooting Array and Expansion Enclosure Connections 259Troubleshooting a Wet Storage Array 260Troubleshooting a Damaged Array Conditions261 Invalid Storage Array ECC ErrorsPCI Errors Critical ConditionsNoncritical Conditions 263264 Visit support.dell.com Getting HelpContacting Dell Click All Support from Support menu266 Index 267268 269 270 271 272

Related manuals

Manual 260 pages 11.3 Kb

Manual 74 pages 53.1 Kb

Manual 22 pages 36.51 Kb