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Question

Answer

I removed a LUN. But the multipathing mapping is still available.

Failback does not happen as expected with the array.

The multipathing device is still available after you remove the LUNs. Run multipath –f <device node for the deleted LUN> to remove the multipathing mapping. For example, if a device related with /dev/dm-1is deleted, you must run multipath –f /dev/dm-1to remove /dev/dm-1from DM mapping table. If multipathing daemon is stopped/restarted, run multipath –Fto flush out all stale mappings.

Sometimes the low level driver cannot auto- detect devices coming back with the array. Run rescan_dm_devs to rescan host server SCSI bus and re-aggregate devices at multipathing layer.

Configuration: Device Mapper Multipath for Linux

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Contents

Dell PowerVault MD3600i and MD3620i Storage Arrays December Contents Planning RAID Controller Modules Cache Functions and Features Virtual Disk Operations Limit Out-of-Band and In-Band Management Configuring Alert Notifications Enabling or Disabling the Event Monitor Edit, Remove, or Rename Host Topology 103 Managing Host Port Identifiers 104107 Host-to-Virtual Disk Mapping 131 117126 130 147 143145 146 Virtual Disk Copy Restrictions ContentsRe-Creating a Snapshot Virtual Disk Creating a Virtual Disk Copy for Preparing Host Servers 179 Using DM Multipathing Devices 186Stopping a Virtual Disk Copy 178 179 211 Downloading Both RAID Controller209 210 229 RAID Controller Module Backup Battery Unit 222Power Supply/Cooling Fan Module 224 227 242 Recovering From an Unresponsive237 241 Troubleshooting a Damaged Array 270 Safety First-For you and Your Array 263Troubleshooting Power 264 Troubleshooting Expansion Enclosure Management Modules 265 272 Contents About This Document Introduction Dell PowerVault Modular Disk Storage Manager Dell PowerVault Modular Disk Configuration UtilityMD3600i 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 Hard-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 MD3600i Series iSCSI RAID Controller Module RAID Controller Module Connectors and Features Item Component Function Shutdown Threshold Type RAID Controller Module-Additional FeaturesBattery Backup Unit Storage Array Thermal Shutdown Write-Back Cache Cache Functions and FeaturesSystem Password Reset Cache Mirroring Write-Through Cache Physical Disks, Virtual Disks, and Disk Groups Planning MD3600i Series Storage Array Terms and Concepts Physical Disk States Physical Disks Virtual Disks and Disk Groups Self-Monitoring Analysis and Reporting Technology RAID Controller Virtual Disk States Description Virtual Disk States RAID Level Usage RAID Levels RAID Background Initialization Segment SizeVirtual Disk Operations Virtual Disk Initialization Foreground Initialization Consistency CheckMedia Verification Cycle Time Disk Group Operations Virtual Disk Operations LimitRAID Level Migration Segment Size Migration Virtual Disk Capacity ExpansionDisk Group Expansion RAID Background Operations Priority Disk Group DefragmentationDisk Group Operations Limit Disk Migration Virtual Disk Migration and Disk Roaming Planning MD3600i Series Storage Array Terms and Concepts Host Server-to-Virtual Disk Mapping Disk Roaming Host Types Advanced Features Snapshot Repository Virtual Disk Snapshot Virtual Disks Virtual Disk Copy Source Virtual DiskTarget Virtual Disk Virtual Disk Recovery Using Snapshot and Disk Copy TogetherMulti-Path Software Virtual Disk Ownership Preferred and Alternate Controllers and Paths Load Balancing Monitoring MD3600i Series System Performance Planning MD3600i Series Storage Array Terms and Concepts Performance Monitor Table Description Column Headings Planning MD3600i Series Storage Array Terms and Concepts User Interface Configuration Overview Enterprise Management Window Array Management Window Inheriting the System Settings Configuration 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 Configuration About Your Storage Array AMW, select Storage Array→ Blink→ Storage Array AMW Setup tab, select Rename Storage ArrayLocating Storage Arrays Naming or Renaming Storage Arrays Name/Rename Storage Arrays dialog appears Setting a Password Password Type the New passwordPassword Guidelines Viewing Storage Array Connections Adding/Editing a Comment to an Existing Storage ArraySelect Edit→ Comment Enabling Premium Features Removing Storage ArraysSelect Edit→ Remove→ Storage Array Displaying Failover Alert Changing the Cache Settings on the Storage Array Changing Expansion Enclosure ID Numbers Changing the Enclosure Order in the Physical PaneAMW, select Storage Array→ Change→ Enclosure Order Select All storage arrays Configuring Alert NotificationsConfiguring E-mail Alerts Select Configure Alerts Configuration About Your Storage Array Configuration About Your Storage Array Configuring Snmp Alerts Battery Settings Setting the Storage Array RAID Controller Module Clocks Enter the Target Chap secret Configuration Using iSCSIChanging the iSCSI Target Authentication Select Manage iSCSI Settings Creating Chap Secrets Entering Mutual Authentication PermissionsSelect the Mutual Authentication tab Click OK in the Manage iSCSI Settings window Valid Ascii Characters for Chap Secrets Initiator Chap SecretTarget Chap Secret Valid Characters for Chap Secrets Select the Target Discovery tab Changing the iSCSI Target Discovery SettingsChanging the iSCSI Target Identification Select the Target Identification tab Configuring the iSCSI Host Ports Configuration Using iSCSI Advanced iSCSI Host Port Settings Description Advanced iSCSI Host Ports Settings Viewing or Ending an iSCSI Session Click Set Baseline Viewing iSCSI Statistics and Setting Baseline Statistics Mappings→ Move Edit, Remove, or Rename Host Topology Configuration Event Monitor Enabling or Disabling the Event Monitor WindowsLinux Configuring Host Access Configuration About Your Host Using the Mappings Tab Select Mappings→ Define→ Host Defining a Host Select Mappings→ Remove Removing Host Access Adding a Host to a Host Group Managing Host GroupsCreating a Host Group Select Mappings→ Define→ Host Group Move Host Confirmation dialog appears Moving a Host to a Different Host GroupRemoving a Host From a Host Group Select Mappings→ Move Removing a Host Group Host Topology101 Click Action→ Start Starting or Stopping the Host Context AgentLinux Windows 103 Data Path Protection Managing Host Port Identifiers Add Host Port Identifier dialog appears104 105 106 Configuration Disk Groups and Virtual Disks Creating Disk Groups and Virtual Disks107 Creating Disk Groups Introduction Create Disk Group window is displayed108 109 Creating Virtual Disks Locating a Disk Group 111 112 Changing the Virtual Disk Modification Priority 113 Changing the Virtual Disk Cache Settings 114 Changing the Segment Size of a Virtual Disk Select Virtual Disk→ Change→ Segment Size115 Changing the I/O Type File system typical Database Multimedia Custom116 Choosing an Appropriate Physical Disk Type Physical Disk Security with Self Encrypting Disk117 118 119 Save Security Key File Validate Security Key Unlock Drives 120 Creating a Security Key 121 Changing a Security Key Click Create Key122 123 Confirm Change Security Key window is displayed Saving a Security Key Click Change Key124 Validate Security Key Unlocking Secure Physical Disks125 Configuring Hot Spare Physical Disks Erasing Secure Physical Disks126 Select Physical disk→ Hot Spare Coverage Hot Spare Physical Disk Options window is displayed127 128 Hot Spares and RebuildGlobal Hot Spares Click Unassign Hot Spare Operation Hot Spare Drive Protection129 Enclosure Loss Protection 130Criteria for Enclosure Loss Protection RAID Level 131 Host-to-Virtual Disk Mapping 132 Creating Host-to-Virtual Disk Mappings 133 Modifying and Removing Host-to-Virtual Disk Mapping 134 Changing Controller Ownership of the Virtual Disk Removing Host-to-Virtual Disk Mapping Select Virtual Disk→ Change→ Ownership/Preferred Path135 136 Select Disk Group→ Change→ Ownership/Preferred Path 137 Restricted MappingsChanging the RAID Level of a Disk Group Select Disk Group→ Change→ RAID Level 138 139 140 Changing the RAID Level of a Disk Group Storage Partitioning141 142 Disk Group and Virtual Disk Expansion Select Disk Group→ Add Free Capacity Physical Disks143 144 Using Free CapacityUsing Unconfigured Capacity Virtual Disk Expansion Non-Exportable Components Disk Group MigrationExport Disk Group Exporting a Disk Group Import Disk Group Importing a Disk Group146 Storage Array Media Scan Non-Importable Components147 148 Changing Media Scan Settings 149 Suspending the Media Scan 150 151 Configuration Premium Feature- Snapshot Virtual Disks 152 Creating a Snapshot Virtual Disk Using the Simple Path About the Simple Path153 154 155 Creating a Snapshot Virtual Disk Using the Advanced Path About the Advanced Path156 157 158 159 160 Creating the Snapshot Using the Advanced PathSpecify Virtual Disk Parameters window is displayed Automatic Map later with Storage Partition 161 Specifying Snapshot Virtual Disk Names 162 163 Snapshot Repository Capacity 164 Click Add Physical Disks 165 Add Physical Disks window closes 166 Re-Creating Snapshot Virtual DisksDisabling a Snapshot Virtual Disk Select Virtual Disk→ Snapshot→ Re-create 167 Preparing Host Servers to Re-Create a Snapshot Virtual Disk Re-Creating a Snapshot Virtual Disk Select Virtual Disk → Snapshot→ Re-create168 169 Configuration Premium Feature- Virtual Disk Copy 170 Creating a Virtual Disk Copy for an Mscs Shared Disk 171 Virtual Disk Read/Write Permissions Virtual Disk Copy Restrictions Creating a Virtual Disk Copy172 Before you Begin Virtual Disk Copy and Modification Operations173 174 Preferred RAID Controller Module OwnershipCreate Copy Wizard Failed Virtual Disk Copy 175 Failed RAID Controller ModuleCopy Manager Copying the Virtual Disk 176 Setting Copy Priority Storage Array Performance During Virtual Disk Copy177 Stopping a Virtual Disk Copy Select Change→ Copy Priority178 Recopying a Virtual Disk Preparing Host Servers to Recopy a Virtual Disk179 180 Recopying the Virtual Disk Removing Copy Pairs Select Copy→ Re-Copy181 182 183 184 185 Configuration Device Mapper Multipath for Linux Using DM Multipathing Devices Prerequisites186 187 Device Mapper Configuration Steps 188 Scan for Newly Added Virtual Disks 189 Create a New fdisk Partition on a Multipath Device Node Dev/mapper/mpathxparty Add a New Partition to Device MapperDev/mapper/mpathxpy Dev/mapper/mpathx-party Ready For Use Linux Host Server Reboot Best PracticesCreate a File System on a Device Mapper Partition Mount a Device Mapper Partition Useful Device Mapper Commands Description Important Information About Special Partitions192 193 Limitations and Known Issues Troubleshooting 194Question Answer 195 196 197 Downloading RAID Controller and Nvsram Packages 198 Downloading Both RAID Controller and Nvsram Firmware 199 Click Transfer 200 201 Downloading Only Nvsram Firmware 202 203 Downloading Physical Disk Firmware 204 205 AMW, select Advanced→ Maintenance→ Download→ EMM FirmwareDownloading MD1200 Series Expansion Module EMM Firmware Download Environmental EMM Firmware dialog appears 206 Self-Monitoring Analysis and Reporting Technology Smart 207 Media Errors and Unreadable Sectors 208 Management Installing Array Components Recommended Tools209 210 Installing the Front BezelFront Bezel Optional Removing the Front Bezel 211 Safety Models AMT, E03J, and E04JHard Drives Removing a Drive Blank Installing a Drive Blank Removing a Hard Drive212 213 Removing and Installing a Hard Drive 214 Installing a Hard Drive 215 Removing a Hard Drive From a Hard-Drive Carrier 216 217 Installing a Hard Drive Into a Drive CarrierRAID Controller Module Removing a RAID Controller Module Blank 218 Installing a RAID Controller Module Blank 219 Removing a RAID Controller Module Installing a RAID Controller Module Opening the RAID Controller Module220 221 Closing the RAID Controller Module RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit222 223 Installing the RAID Controller Module Backup Battery Unit Power Supply/Cooling Fan Module Removing a Power Supply/Cooling Fan Module224 225 226 Installing a Power Supply/Cooling Fan Module Control Panel Removing the Control Panel227 228 Installing the Control Panel Backplane Removing the Backplane229 230 17. Removing and Installing the Backplane-PowerVault MD3620i 16. Removing and Installing the Backplane-PowerVault MD3600i 232 Installing the Backplane Management Firmware Inventory Viewing the Firmware Inventory233 234 Management System Interfaces Microsoft ServicesVirtual Disk Service Volume Shadow-Copy Service 236 237 Troubleshooting Your Storage Array SoftwareStart-Up Routine Device Health Conditions On the Setup tab, select Manage a Storage Array 238Status Icon Description Additional Status Icons Description 239 240 241 Storage Array Support DataAutomatically Collect the Support Bundle Data Enter the Execution summary 242 Retrieving Trace Buffers 243 Collecting Physical Disk Data Collect Physical Disk Data window is displayed244 245 Event Log 246 Recovery GuruStorage Array Profile Select Storage Array→ View→ Profile 247 Viewing the Logical Associations Viewing the Physical Associations248 249 Finding Nodes 250 Using Go ToSelect Find all free capacity nodes Click Find Next 251 Recovering From an Unresponsive Storage Array Condition 252 253 254 Locating a Physical Disk Locating an Expansion Enclosure Select Physical Disk→ Blink→ Expansion Enclosure255 256 Capturing the State Information 257 SMrepassist Utility Recovering From an Unidentified Storage Array Unidentified Devices258 259 260 261 Starting or Restarting the Host Context Agent Software 262 263 Troubleshooting Your ArrayTroubleshooting Loss of Communication Troubleshooting External Connections 264 Troubleshooting Power Supply/Cooling Fan Module Troubleshooting Array Cooling Problems Troubleshooting Expansion Enclosure Management Modules265 266 Troubleshooting RAID Controller Modules 267 268 Troubleshooting Hard Drives Troubleshooting Array and Expansion Enclosure Connections Troubleshooting a Wet Storage Array269 270 Troubleshooting a Damaged Array 271 ECC ErrorsConditions Invalid Storage Array 272 PCI ErrorsCritical Conditions Noncritical Conditions Click All Support from Support menu Getting HelpContacting Dell Visit support.dell.com 274 275 Index 276 277 278 279 Smart 280 281 282

Dell MD3600I, MD3620I owner manual 195

Models: MD3600I MD3620I

Question

195