Media Errors and Unreadable Sectors, 187

Media Errors and Unreadable Sectors

If the RAID controller detects a media error while accessing data from a physical disk that is a member of a disk group with a redundant RAID level (RAID 1, RAID 5 or RAID 10), the controller tries to recover the data from peer disks in the disk group and uses recovered data to correct the error. If the controller encounters an error while accessing a peer disk, it is unable to recover the data and affected sectors are added to the unreadable sector log maintained by the controller. Other conditions under which sectors are added to the unreadable sector log include:

•A media error is encountered when trying to access a physical disk that is a member of a nonredundant disk group (RAID 0 or degraded RAID 1, RAID 5 or RAID 10).

•An error is encountered on source disks during rebuild.

NOTE: Data on an unreadable sector is no longer accessible.

Management: Firmware Downloads

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Dell MD3220, MD3200 owner manual Media Errors and Unreadable Sectors, 187

Contents

Dell PowerVault MD3200 and MD3220 Storage Arrays May Contents Planning MD3200 Series Storage Array Terms and Concepts Cache Functions and Features Virtual Disk Operations Limit Out-of-Band and In-Band Management Configuring Alert Notifications Managing Host Port Identifiers Enabling or Disabling the Event Monitor Physical Disk Security with Self Encrypting Configuring Hot Spare Physical DisksHost-to-Virtual Disk Mapping 125 Creating a Snapshot Virtual Disk UsingSnapshot Using the Simple Path 137 122 154 145Re-creating a Snapshot Virtual Disk 152 Creating a Virtual Disk Copy for an Mscs 161 Using DM Multipathing Devices 168159 160 178 Media Errors and Unreadable Sectors 187Downloading RAID Controller and Nvsram 177 206 Power Supply/Cooling Fan Module 204197 202 221 Recovering From an Unresponsive Storage 229217 Storage Array Support Data 220 Troubleshooting External Connections Safety First-For you and Your ArrayTroubleshooting Storage Array Startup Failure Troubleshooting Loss of Communication 253 About This Document Introduction Dell PowerVault Modular Disk Storage Manager Dell PowerVault MD3200 Series Storage Array Other Information you May Need Introduction Overview Planning About Your Storage Array Front-Panel Features and Indicators Hardware Features Planning About Your Storage Array Item Indicator, Button, or Icon Description Connector Back Panel Features and Indicators Hard Drive Indicators Hard-Drive Indicator Patterns Drive-Status Indicator Pattern Condition Power Supply and Cooling Fan Features Power Indicator Codes Item LED Type Icon Description Power Indicator Codes RAID Controller Modules Planning RAID Controller Modules Function RAID Controller Module Connectors and Features Item Component Function Battery Backup Unit RAID Controller Module-Additional FeaturesComponent Function Event Description System Password ResetStorage Array Thermal Shutdown Shutdown Threshold Type Write-Through Cache Cache Functions and FeaturesCache Mirroring Write-Back Cache Physical Disks, Virtual Disks, and Disk Groups Planning MD3200 Series Storage Array Terms and Concepts Physical Disk States Physical Disks Virtual Disks and Disk Groups Self-Monitoring Analysis and Reporting Technology Virtual Disk States RAID LevelsRAID Controller Virtual Disk States Description RAID RAID Level Usage RAID Background Initialization Segment SizeVirtual Disk Operations Virtual Disk Initialization Media Verification Consistency CheckCycle Time Segment Size Migration Disk Group OperationsVirtual Disk Operations Limit RAID Level Migration Disk Group Expansion Virtual Disk Capacity Expansion Disk Group Defragmentation RAID Background Operations PriorityDisk Group Operations Limit Disk Migration Virtual Disk Migration and Disk Roaming Planning MD3200 Series Storage Array Terms and Concepts Disk Roaming Advanced Features Host Types Host Server-to-Virtual Disk MappingSnapshot Virtual Disks Snapshot Repository Virtual Disk Target Virtual Disk Virtual Disk RecoveryVirtual Disk Copy Source Virtual Disk Multi-Path Software Using Snapshot and Disk Copy Together Virtual Disk Ownership Preferred and Alternate Controllers and Paths Load Balancing Monitoring MD3200 Series System Performance Performance Monitor Table Description Column Headings For more information, see the online help topics Planning MD3200 Series Storage Array Terms and Concepts User Interface Configuration Overview Enterprise Management Window Array Management Window Inheriting the System SettingsSelect Tools→ Inherit System Settings Select Inherit system settings for color and font Configuration Overview Out-of-Band and In-Band Management Configuration About Your Storage ArrayOut-of-Band Management Adding Storage Arrays Storage ArraysIn-Band Management Manual Addition of a Storage Array Automatic Discovery of Storage ArraysSelect Edit→ Add Storage Array Setting Up Your Storage Array AMW, select Storage Array→ Blink→ Storage Array Locating Storage Arrays Name/Rename Storage Arrays dialog appears Naming or Renaming Storage Arrays Password Setting a PasswordType the New password Viewing Storage Array Connections Password Guidelines Select Edit→ Remove→ Storage Array Adding/Editing a Comment to an Existing Storage ArrayRemoving Storage Arrays Select Edit→ Comment Failover Alert Display Enabling Premium Features Changing Expansion Enclosure ID Number Changing the Cache Settings on the Storage ArrayChanging the Enclosure Order in the Physical Pane Select All storage arrays Configuring Alert NotificationsSelect Configure Alerts AMW, select Storage Array→ Change→ Enclosure Order Configuring E-mail Alerts Configuration About Your Storage Array Configuring Snmp Alerts Battery Settings Setting the Storage Array RAID Controller Module Clocks Configuration About Your Storage Array Configuration Event Monitor Windows Enabling or Disabling the Event MonitorLinux Configuring Host Access Configuration About Your Host Defining a Host Using the Mappings TabSelect Mappings→ Define→ Host Configuration About Your Host Select Mappings→ Remove Removing Host AccessManaging Host Groups Creating a Host Group Select Mappings→ Move Moving a Host to a Different Host GroupAdding a Host to a Host Group Removing a Host From a Host Group Host Topology Removing a Host Group Linux Starting or Stopping the Host Context AgentWindows Click Action→ Start Data Path Protection Add Host Port Identifier dialog appears Managing Host Port Identifiers Configuration About Your Host Creating Disk Groups and Virtual Disks Configuration Disk Groups and Virtual Disks Introduction Create Disk Group window is displayed Creating Disk Groups Configuration Disk Groups and Virtual Disks Creating Virtual Disks Locating a Disk Group Configuration Disk Groups and Virtual Disks Changing the Virtual Disk Modification Priority Map later Using Mappings View Changing the Virtual Disk Cache Settings 100 101 Changing the Segment Size of a Virtual Disk Select Virtual Disk→ Change→ Segment Size Changing the I/O Type102 File system typical Database Multimedia Custom Choosing an Appropriate Physical Disk Type103 104 Physical Disk Security with Self Encrypting Disk 105 106 Creating a Security Key 107 Click Create Key Confirm Change Security Key window is displayed Changing a Security Key108 Click Change Key Saving a Security Key109 110 Unlocking Secure Physical Disks Erasing Secure Physical Disks Configuring Hot Spare Physical Disks111 Hot Spare Physical Disk Options window is displayed Select Physical disk→ Hot Spare Coverage112 113 Hot Spares and RebuildGlobal Hot Spares Click Unassign Hot Spare Drive Protection Hot Spare Operation114 115 Enclosure Loss ProtectionCriteria for Enclosure Loss Protection RAID Level 116 Host-to-Virtual Disk Mapping 117 Creating Host-to-Virtual Disk Mappings 118 Modifying and Removing Host-to-Virtual Disk Mapping 119 Changing Controller Ownership of the Virtual Disk Select Virtual Disk→ Change→ Ownership/Preferred Path Removing Host-to-Virtual Disk Mapping120 121 Select Disk Group→ Change→ Ownership/Preferred Path 122 Restricted MappingsChanging the RAID Level of a Disk Group Select Disk Group→ Change→ RAID Level 123 124 125 Changing the RAID Level of a Disk Group 126 Storage Partitioning 127 Select Disk Group→ Add Free Capacity Physical Disks Disk Group and Virtual Disk Expansion128 129 Using Free CapacityUsing Unconfigured Capacity Virtual Disk Expansion Non-Exportable Components Disk Group MigrationExport Disk Group Exporting a Disk Group Importing a Disk Group Import Disk Group131 Non-Importable Components Storage Array Media Scan132 133 Changing Media Scan Settings 134 Suspending the Media Scan 135 Configuration Premium Feature- Snapshot Virtual Disks 136 Creating a Snapshot Virtual Disk Using the Simple Path 137 About the Simple Path 138 139 About the Advanced Path Creating a Snapshot Virtual Disk Using the Advanced Path140 141 142 143 Creating the Snapshot Using the Advanced Path 144 Specify Virtual Disk Parameters window is displayed 145 Specifying Snapshot Virtual Disk Names 146 Snapshot Repository Capacity 147 Add Physical Disks window closes Click Add Physical Disks148 Select Virtual Disk→ Snapshot→ Re-create Re-creating Snapshot Virtual Disks149 150 Disabling a Snapshot Virtual Disk 151 Preparing Host Servers to Re-create a Snapshot Virtual Disk Select Virtual Disk → Snapshot→ Re-create Re-creating a Snapshot Virtual Disk152 153 Configuration Premium Feature- Virtual Disk Copy 154 Creating a Virtual Disk Copy for an Mscs Shared Disk Virtual Disk Copy Restrictions Virtual Disk Read/Write Permissions155 156 Creating a Virtual Disk Copy 157 Before you BeginVirtual Disk Copy and Modification Operations Create Copy Wizard 158 Preferred RAID Controller Module OwnershipFailed RAID Controller Module Failed Virtual Disk Copy Copying the Virtual Disk Copy Manager159 160 Storage Array Performance During Virtual Disk Copy 161 Setting Copy PriorityStopping a Virtual Disk Copy Select Change→ Copy Priority Preparing Host Servers to Recopy a Virtual Disk Recopying a Virtual Disk162 163 Recopying the Virtual Disk Select Copy→ Re-Copy Removing Copy Pairs164 165 166 167 Configuration Device Mapper Multipath for Linux Prerequisite Steps Using DM Multipathing Devices168 Scan for Newly Added Virtual Disks Device Mapper Configuration Steps169 170 Add a New Partition to Device Mapper Create a New fdisk Partition on a Multipath Device Node171 Important Information About Special Partitions Create a File System on a Device Mapper PartitionMount a Device Mapper Partition Ready for Use 173 Device Mapper Commands Descriptions 174 Limitations and Known Issues 175 TroubleshootingQuestionAnswer 176 177 Downloading RAID Controller and Nvsram Packages 178 Downloading Both RAID Controller and Nvsram Firmware 179 Click Transfer 180 Downloading Only Nvsram Firmware Upgrade RAID Controller Module Firmware window appears Select Tools→ Upgrade RAID Controller Module Firmware181 182 183 Downloading Physical Disk Firmware 184 185 AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware Download Environmental EMM Firmware dialog appears 186 Self-Monitoring Analysis and Reporting Technology Smart 187 Media Errors and Unreadable Sectors 188 Recommended Tools Management Installing Array Components189 190 Installing the Front BezelFront Bezel Optional Removing the Front Bezel 191 Safety Models AMT, E03J, and E04JHard Drives Removing a Drive Blank Removing a Hard Drive Installing a Drive Blank192 193 Removing and Installing a Hard Drive 194 Installing a Hard Drive 195 Removing a Hard Drive From a Hard-Drive Carrier 196 197 Installing a Hard Drive Into a Drive CarrierRAID Controller Module Removing a RAID Controller Module Blank 198 Installing a RAID Controller Module Blank 199 Removing a RAID Controller Module Opening the RAID Controller Module Installing a RAID Controller Module200 201 Closing the RAID Controller Module Removing the RAID Controller Module Backup Battery Unit RAID Controller Module Backup Battery Unit202 203 Installing the RAID Controller Module Backup Battery Unit Removing a Power Supply/Cooling Fan Module Power Supply/Cooling Fan Module204 205 Installing a Power Supply/Cooling Fan Module Removing the Control Panel Control Panel206 207 208 Installing the Control Panel Removing the Backplane Backplane209 210 17. Removing and Installing the Backplane-PowerVault MD3220 16. Removing and Installing the Backplane-PowerVault MD3200 212 Installing the Backplane Viewing the Firmware Inventory Management Firmware Inventory213 214 Management System Interfaces Microsoft ServicesVirtual Disk Service Volume Shadow-Copy Service 216 217 Troubleshooting Your Storage Array SoftwareStart-Up Routine Device Health Conditions 218 On the Setup tab, select Manage a Storage ArrayStatus Icon Description Additional Status Icons Description 219 220 Storage Array Support Data Enter the Execution summary Automatically Collect the Support Bundle Data221 Event Log Collecting the Physical Disk Data222 223 Recovery Guru Select Storage Array→ View→ Profile Storage Array Profile224 225 Viewing the Physical Associations Viewing the Logical Associations226 227 Finding Nodes 228 Using Go ToSelect Find all free capacity nodes Click Find Next 229 Recovering From an Unresponsive Storage Array Condition 230 231 232 Locating a Physical Disk Select Physical Disk→ Blink→ Expansion Enclosure Locating an Expansion Enclosure233 234 Capturing the State Information 235 SMrepassist Utility Unidentified Devices Recovering From an Unidentified Storage Array236 237 238 239 Starting or Restarting the Host Context Agent Software 240 241 Troubleshooting Your ArrayTroubleshooting Loss of Communication Troubleshooting External Connections 242 Troubleshooting Power Supply/Cooling Fan Module Troubleshooting Expansion Enclosure Management Modules Troubleshooting Array Cooling Problems243 244 Troubleshooting RAID Controller Modules 245 246 Troubleshooting Hard Drives 247 Troubleshooting Array and Expansion Enclosure Connections 248 Troubleshooting a Wet Storage Array Conditions Troubleshooting a Damaged Array249 Critical Conditions ECC ErrorsPCI Errors Invalid Storage Array 251 Noncritical Conditions 252 Click All Support from Support menu Getting HelpContacting Dell Visit support.dell.com 254 255 Index 256 257 258 259 260