Sun Microsystems 440 manual Volume Management Software, Veritas Dynamic Multipathing

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Volume Management Software

Volume management software lets you create disk volumes. Sun Microsystems offers two different volume management applications for use on the Netra 440 server:

■VERITAS Volume Manager (VVM) software

■Solaris™ Volume Manager software

Sun’s volume management applications offer the following features:

■Support for several types of RAID configurations, which provide varying degrees of availability, capacity, and performance

■Hot-spare facilities, which provide for automatic data recovery when disks fail

■Performance analysis tools, which enable you to monitor I/O performance and isolate bottlenecks

■A graphical user interface (GUI), which simplifies storage management

■Support for online resizing, which enables volumes and their file systems to grow and shrink online

■Online reconfiguration facilities, which let you change to a different RAID configuration or modify characteristics of an existing configuration

VERITAS Dynamic Multipathing

VERITAS Volume Manager software actively supports multiported disk arrays. It automatically recognizes multiple I/O paths to a particular disk device within an array. Called Dynamic Multipathing (DMP), this capability provides increased reliability by providing a path failover mechanism. If one connection to a disk is lost, VVM continues to access the data over the remaining connections. This multipathing capability also provides greater I/O throughput by automatically balancing the I/O load uniformly across multiple I/O paths to each disk device.

Sun StorEdge Traffic Manager

A newer alternative to DMP that is also supported by the Netra 440 server is Sun StorEdge Traffic Manager software. Sun StorEdge Traffic Manager is a server-based dynamic path failover software solution, used to improve the overall availability of business applications. Sun StorEdge Traffic Manager (previously known as multiplexed input/output, or MPxIO) is included in the Solaris OS.

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Contents Netra 440 Server System Administration Guide Page Contents Managing RAS Features and System Firmware Managing Disk Volumes Iv Netra 440 Server System Administration Guide August Figures Vi Netra 440 Server System Administration Guide August Tables Viii Netra 440 Server System Administration Guide August Preface How This Book Is OrganizedUsing Unix Commands Shell PromptsTypographic Conventions Related DocumentationContacting Sun Technical Support Accessing Sun DocumentationThird-Party Web Sites Sun Welcomes Your CommentsConfiguring the System Console Communicating With the System1Ways of Communicating With the System Using the System Console What the System Console DoesSerial MGT NET MGT Alom serial management port Alom network management port Alternative System Console Configuration 3Alternative Console Ports Require Additional ConfigurationAccessing the System Console Through a Graphics Monitor About the sc Prompt OpenBoot ok Prompt Access Through Multiple Controller SessionsReaching the sc Prompt Reaching the ok Prompt Alom System Controller break or console Command Graceful ShutdownL1-A Stop-A Keys or Break Key Externally Initiated Reset XIR Manual System ResetFor More Information Getting to the ok Prompt2Ways of Accessing the ok Prompt To Get to the ok PromptConsole # Accessing the System Controller Using the Serial Management PortActivating the Network Management Port To Use the Serial Management PortEstablish an Alom system controller session To verify the network settings, type To Activate the Network Management PortLog out of the Alom system controller session Accessing the System Console Through a Terminal Server To Access The System Console Through a Terminal Server3Pin Crossovers for Connecting to a Typical Terminal Server Open a terminal session on the connecting device, and type Accessing the System Console Through a TIP Connection Power on the systemTo Access the System Console Through the TIP Connection A shell tool window on the Sun system, typeOk power-off If the number displayed by the uname -rcommand is less than Modifying the /etc/remote FileTo Modify the /etc/remote File Netra 440 Server System Administration Guide August Ok setenv input-device ttyb ok setenv output-device ttyb Open a shell tool window Type Verifying Serial Port Settings on TtybTo Verify the Serial Port Settings on Ttyb Look for the following outputFor more information, see Getting to the ok Prompt on To cause the changes to take effect, type System Console OpenBoot Configuration Variable Settings Output-device Ttya Ttyb Screen Input-device KeyboardNetra 440 Server System Administration Guide August Managing RAS Features and System Firmware Alom System Controller Logging In To the Alom System ControllerAbout the scadm Utility To Log In To the Alom System ControllerTo View Environmental Information Sc showenvironmentControlling the Locator LED To turn on the Locator LED, do one of the followingTo turn off the Locator LED, do one of the following OpenBoot Emergency Procedures To Restore OpenBoot Configuration Defaults Stop-A FunctionalityStop-N Functionality Stop-F Functionality Automatic System RecoveryTo reset the system, type the following command Stop-D FunctionalityAuto-Boot Options Error Handling Summary Enabling and Disabling Automatic System Recovery Reset ScenariosAutomatic System Recovery User Commands To Enable Automatic System RecoveryTo Disable Automatic System Recovery To cause the parameter changes to take effect, typeTo cause the parameter change to take effect, type Unconfiguring and Reconfiguring Devices Obtaining Automatic System Recovery InformationTo Unconfigure a Device Manually To determine full physical device paths, type To Reconfigure a Device Manually To Enable the Hardware Watchdog Mechanism Enabling the Hardware Watchdog Mechanism and Its OptionsMultipathing Software Managing Disk Volumes Disk VolumesVolume Management Software Veritas Dynamic MultipathingSun StorEdge Traffic Manager Managing Disk Volumes RAID Technology Disk ConcatenationRAID 0 Disk Striping RAID 1 Disk MirroringHardware Disk Mirroring RAID 5 Disk Striping With ParityHot-Spares To Create a Hardware Disk Mirror C1t3d0 Devices/pci@1f,700000/scsi@2/sd@3,0For example To Delete a Hardware Disk Mirror To delete the volume, type the following command To confirm a failed disk, type the following command To Perform a Mirrored Disk Hot-Plug OperationTo Perform a Non-Mirrored Disk Hot-SwapOperation View the status of the Scsi devices CD-ROMRemove the hard drive from the device tree # cfgadm -x removedevice c0dsk/c1t1d0Configure the new hard drive Verify that the device has been removed from the device treeVerify that the new hard drive is in the device tree OpenBoot Configuration Variables Baudrate, bits Appendix a OpenBoot Configuration Variables Netra 440 Server System Administration Guide August Alarm Relay Output Application Programming Interface Netra 440 Server System Administration Guide August Page Netra 440 Server System Administration Guide August Page Netra 440 Server System Administration Guide August Symbols IndexNetra 440 Server System Administration Guide August Asr-disable, 46 go Console, 11, 41 console -f, 9 poweroff, 12 poweron Uadmin 11 uname, 25 uname -r Netra 440 Server System Administration Guide August