Dell Computer Drive manual Disk Groups and Virtual Disks

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Disk Groups and Virtual Disks

Following is a list of terms used throughout this chapter:

•Disk Group — A set of physical disks that are logically grouped and assigned a RAID level. Every disk group provides the overall capacity required to create one or more virtual disks.

•Virtual Disk — A logical component created to enable hosts to access storage on the storage array. A virtual disk is created from the capacity available on a disk group and appears as one logical component even though it is created from more than one physical disk.

•Storage Partitioning — Logical division of a storage array into entities consisting of one or more virtual disks that can be accessed by a single host or shared among hosts that are part of a host group.

•Unconfigured Capacity — Physical disks that are not already assigned to a disk group.

•Free Capacity — Space in a disk group that has not been assigned to a virtual disk.

•Standby Hot Spare Drive — Physical disk that has been assigned as a hot spare drive and is available to take over for any failed physical disk.

•In-use Hot Spare Drive — Physical disk that has been assigned as a hot spare drive and is currently taking over for a failed physical disk.

•Snapshot Virtual Disk — Point-in-time image of a virtual disk in a storage array.

•Snapshot Repository Virtual Disk — Virtual disk containing metadata and copy-on-write data for a particular snapshot virtual disk; automatically created when the snapshot virtual disk is created.

•Consistency Check — Background operation that checks the parity of virtual disks.

Disk Groups and Virtual Disks

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Contents W . d e l l . c o m s u p p o r t . d e l l . c o m Dell PowerVault Modular Disk Storage Manager User’s GuideFebruary Contents Connecting the Serial Cable System Setup for Password Reset Viewing iSCSI Statistics and Setting Baseline Disk Groups and Virtual Disks Premium Feature-Snapshot Virtual Disks Troubleshooting Problems 101 Contents User Interface About This GuideModify Tab Configure TabSummary Tab Support Tab Tools TabISCSI Tab View online help View the event log Other Information You May NeedAbout Your Storage Array Access Virtual DiskOut-of-Band and In-Band Management Manual Addition of a Storage Array Adding Storage ArraysAutomatic Discovery of Storage Arrays Removing Storage Arrays Naming Storage ArraysInitial setup tasks include Setting Up Your Storage ArrayStorage Array Storage Array Support Data Setting a PasswordTo set, change, or remove a password for a storage array Password Guidelines Resetting a PasswordConnecting the Serial Cable Consider these guidelines when you create a passwordMicrosoft Windows Operating Systems System Setup for Password ResetReset Password Changing Expansion Enclosure ID Numbers Configuring Alert NotificationsConfiguring E-mail Alerts Storage Array Configuring Snmp Alerts Starting or Restarting the Host-Agent Software in Linux Starting or Restarting the Host-Agent Software in WindowsStorage Array Storage Array Using the iSCSI Tab Using iSCSICreating Chap Secrets Changing the iSCSI Target AuthenticationEntering Mutual Authentication Permissions Valid Ascii Characters for Chap Secrets Space Using iSCSI Type the alias in the iSCSI target alias field and click OK Changing the iSCSI Target IdentificationChanging the iSCSI Target Discovery Advanced iSCSI Host Ports Settings Configuring the MD3000i iSCSI Host PortsViewing or Ending an iSCSI Session Lowest priority defaultViewing iSCSI Statistics and Setting Baseline Statistics Edit, Remove, or Rename Host Topology Host Topology Actions Desired Action Using iSCSI Enabling the Event Monitor Service Status area, click Start LinuxEvent Monitor Disabling the Event Monitor About Your Host Configuring Host AccessManual Configuration using SAS HBA Automatic ConfigurationClick Next Manual Configuration using iSCSIRemoving Host Access Adding a Host to a Host Group Host GroupsCreating a Host Group Moving a Host to a Different Host Group Removing a Host From a Host GroupRemoving a Host Group Host Topology Host Context Agent Failover with Red Hat Enterprise Linux Create a virtual disk and map it to LUN Reboot the hostData Path Protection About Your Host Disk Groups and Virtual Disks Creating Disk Groups and Virtual Disks Manual Configuration Disk Groups and Virtual Disks Disk Groups and Virtual Disks Hot Spare Drive Protection Automatically Configuring Hot SparesClick OK in the dialog box Manually Configuring Hot SparesModifying and Removing Host-to-Virtual Disk Mapping Host-to-Virtual Disk MappingCreating Host-to-Virtual Disk Mappings Changing Controller Ownership of the Virtual Disk Storage PartitioningVirtual Disk Expansion Disk Group and Virtual Disk ExpansionDisk Group Expansion Storage Array Media Scan Changing Media Scan SettingsErrors discovered by the media scan include Suspending the Media Scan Microsoft ServicesVirtual Disk Service Volume Shadow-Copy Service Disk Groups and Virtual Disks Premium Feature-Snapshot Virtual Disks About the Simple Path Creating a Snapshot Virtual Disk Using the Simple PathHost-to-Virtual Disk Mapping The default setting is Map now SMrepassist -ffilename-identifier Creating the Snapshot Using the Simple Path Snapshot Virtual Disks About the Advanced Path Creating a Snapshot Virtual Disk Using the Advanced PathSnapshot Virtual Disks SMrepassist -ffilename-identifier Creating the Snapshot Using the Advanced Path Snapshot Virtual Disks Source-virtual disk-name-sequence-number Specifying Snapshot Virtual Disk NamesSnapshot Repository Capacity Disabling a Snapshot Virtual Disk Re-creating Snapshot Virtual DisksPreparing Host Servers to Re-create a Snapshot Virtual Disk To disable a snapshot virtual diskRe-creating a Snapshot Virtual Disk Premium Feature-Virtual Disk Copy Reasons to use virtual disk copy include the following Creating a Virtual Disk Copy for an Mscs Shared DiskVirtual Disk Read/Write Permissions If you are using the target virtual disk for backup purposesVirtual Disk Copy Restrictions Preparing Host Servers to Create a Virtual Disk Copy Creating a Virtual Disk CopyClick Next at the bottom Copying the Virtual DiskChoose the target virtual disk Storage Array Performance During Virtual Disk Copy Setting Copy PriorityRecopying a Virtual Disk Stopping a Virtual Disk CopyTo stop a virtual disk copy, complete the following steps Click Yes to stop the virtual disk copyPreparing Host Servers to Recopy a Virtual Disk Recopying the Virtual Disk Removing Copy Pairs Virtual Disk Copy Downloading RAID Controller and Nvsram Packages Firmware DownloadsDownloading Both RAID Controller and Nvsram Firmware Downloading Non-redundant Mscs Nvsram Firmware Downloading Only Nvsram FirmwareDownloading Physical Disk Firmware Downloading EMM Firmware 100 Recovery Guru Troubleshooting ProblemsStorage Array Profile Device Health Conditions102 SMrepassist Utility103 Support Information PackageClick Browse Unidentified Devices Recovering from an Unidentified Storage Array105 Ping host-name-or-IP-address-of-the-hostTroubleshooting 107 Removing an EMM from the Expansion EnclosureInserting an EMM into an Expansion Enclosure 108 MD3000 Maintenance ConsiderationsRemoving and Inserting Physical Disks 109 110 111 IndexIndex 113 114