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HP XP10000 Creating logical volumes, Example lvremove /dev/vgnn/lvolx, lvextend, lvreduce

Models: XP10000

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Creating logical volumes

Creating logical volumes

Use these commands for logical volume configuration:

lvremove	Deletes a logical volume.
	Any file system attached to the logical volume must be
	unmounted before executing the lvremove command.
	Example: lvremove /dev/vgnn/lvolx
lvextend	Increases the size of an existing logical volume.
	Example: lvextend –L size /dev/vgnn/lvolx
lvreduce	Decreases the size of an existing logical volume.
	Any file system attached to the logical volume must be
	unmounted before executing the lvreduce command.
	Example: lvreduce –L size /dev/vgnn/lvolx

Caution Data within the file system can be lost after execution of lvreduce.

Create logical volumes after you create volume groups. A logical volume must be created for each new SCSI disk device

To create logical volumes:

1.Use the lvcreate –Lcommand to create a logical volume.

Specify the volume size (in megabytes) and the volume group for the new logical volume. HP-UX assigns the logical volume numbers automatically (lvol1, lvol2, lvol3). Use the following capacity values for the size parameter:

OPEN-K = 1740 OPEN-3 = 2344 OPEN-8 = 7004 OPEN-9 = 7004 OPEN-E = 13888

Installation

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HP XP10000 Creating logical volumes, Example lvremove /dev/vgnn/lvolx, lvextend, lvreduce, To create logical volumes

Contents

HP StorageWorks Disk Array XP operating system configuration guide HP-UXXP128 XP1024 XP10000 XP12000 sixth edition July part number A5951-96015HP-UX is a registered trademark of Hewlett-Packard Company 1 Installation ContentsIndex TroubleshootingWorksheets Disk array device emulationsDisk arrays About this guideIntended audience PrerequisitesHP StorageWorks Disk Array XP128 Owner’s Guide Related documentationHP storage website HP sales and authorized resellersHP technical support Bold Document conventionsItalics Blue text FigureRevision history Warranty statement LIMITATION OF LIABILITY. EXCEPT TO THE EXTENT PROHIBITED BY LOCAL LAW, IN NO EVENT INCLUDING NEGLIGENCE WILL HP OR ITS SUBSIDIARIES, AFFILIATES, DIRECTORS, OFFICERS, EMPLOYEES, AGENTS OR SUPPLIERS BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR OTHER DAMAGES INCLUDING LOST PROFIT, LOST DATA, OR DOWNTIME COSTS, ARISING OUT OF THE USE, INABILITY TO USE, OR THE RESULTS OF USE OF THE SOFTWARE, WHETHER BASED IN WARRANTY, CONTRACT, TORT OR OTHER LEGAL THEORY, AND WHETHER OR NOT ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Your use of the Software is entirely at your own risk. Should the Software prove defective, you assume the entire cost of all service, repair or correction. Some jurisdictions do not allow the exclusion or limitation of liability for incidental or consequential damages, so the above limitation may not apply to you to the extent prohibited by such local laws Page Installation InstallationFeatures and requirements Fibre Channel interface Failover Device emulation typesRAID Manager command devices SNMP configurationInstallation procedures Setting the host mode for the disk array ports Install and configure the disk arrayPage Level Setting the System Option ModesInstallation ModeFibre Address Configuring the Fibre Channel portsFabric and Connection parameter settings Installing and configuring the HBAs Install and configure the hostLoading the OS and software Clustering and fabric zoning Fabric Zoning Fabric zoning and LUN security for multiple operating systemsEnvironment OS MixDefining the paths Connect the disk arrayIn Command View XP AE, LUN mapping includes Configuring ports Example Verifying HBA installationInstallation To verify device recognition Verifying device recognitionExample x = SCSI bus instance number y = SCSI target ID z = LUN cxtydz whereExample different address for each port, reboot the server, and then verify new device recognition again Configure disk array devices Verifying the device files and drivers This task can also be accomplished with the lssf command Example Examplecxtydz where Creating the device filesinsf Installing special files for mux2 instance ExampleExample Example 0xxxyz00 where xx = SCSI bus instance number y = SCSI target IDIf you need to delete a device file, use the rm -i command Example of a completed device data tableTo create the physical volumes Creating the physical volumesTo create volume groups Creating new volume groups7. Create the volume group each volume group, and c = characterIn this example group name = vg06, major number of group file = minor number of existing group file = 06 which must be unique fordev/dsk/c6t0d0 Example lvremove /dev/vgnn/lvolx Creating logical volumesTo create logical volumes lvremoveExample OPEN-L =Example Creating the file systemsTo create file systems Example Example 2. Repeat step 1 for each logical volume on the disk arrayTo change the I/O timeout parameter Setting the I/O timeout parameterTo create a mount directory for each logical volume Creating the mount directoriesTo mount and verify the file systems Mounting and verifying the file systemsExample Example To set up and verify the auto-mount parameters Setting and verifying the auto-mount parametersExample Device to mount Page Troubleshooting TroubleshootingError conditions with vgcreate pvcreate for example, /dev/rdsknewfs for example, /dev/vg01/r/vo/x The host hangs or devices are Contact Information Calling the HP support centerBefore you call Page Worksheets WorksheetsPath worksheet Disk array device emulations Disk array device emulationsLUSE Supported emulationsOPEN OPENDevice Type Device type specificationsSector SectorsNote 1 The availability of a disk type depends on the disk array Example For a CVS LUSE volume with capacity = 37 MB and n = extent LUSE device parametersPhysical physicalextent size Physicalphysical extentextent size Physicalphysical extentSCSI TID map for Fibre Channel adapters The mapping cannot be done when these conditions exist Reference information for SAM To configure the newly installed SCSI disk devices Configuring the devices using SAM1. Select Disks and File Systems, then select Disk Devices 4. In the Add a Disk Using LVM window, select Create... or Extend a Volume Group To change the maximum number of volume groups Setting the maximum number of volume groups using SAMGlossary disk controller unit LDEV Volume size customization. Synonymous with CVS support representatives onlyIndex Page Page auto-mount parameters 52 cannot be created 57 creating setting maximum number 76 logicalcannot be created 57 creating 41 creating groups W warranty web site groups cannot be created 57 creating