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Veritas™ Volume Manager Administrator's Guide
Last Published:
2018-11-02
Product(s):
InfoScale & Storage Foundation (5.1 SP1)
Platform: HP-UX
- Understanding Veritas Volume Manager
- VxVM and the operating system
- How VxVM handles storage management
- Volume layouts in VxVM
- Online relayout
- Volume resynchronization
- Dirty region logging
- Volume snapshots
- FastResync
- Provisioning new usable storage
- Administering disks
- Disk devices
- Discovering and configuring newly added disk devices
- Discovering disks and dynamically adding disk arrays
- How to administer the Device Discovery Layer
- Changing the disk-naming scheme
- Adding a disk to VxVM
- Rootability
- Displaying disk information
- Removing disks
- Removing and replacing disks
- Administering Dynamic Multi-Pathing
- How DMP works
- Administering DMP using vxdmpadm
- Gathering and displaying I/O statistics
- Specifying the I/O policy
- Online dynamic reconfiguration
- Reconfiguring a LUN online that is under DMP control
- Creating and administering disk groups
- About disk groups
- Displaying disk group information
- Creating a disk group
- Importing a disk group
- Moving disk groups between systems
- Handling cloned disks with duplicated identifiers
- Handling conflicting configuration copies
- Reorganizing the contents of disk groups
- Destroying a disk group
- Creating and administering subdisks and plexes
- Displaying plex information
- Reattaching plexes
- Creating volumes
- Types of volume layouts
- Creating a volume
- Using vxassist
- Creating a volume on specific disks
- Creating a mirrored volume
- Creating a striped volume
- Creating a volume using vxmake
- Initializing and starting a volume
- Using rules and persistent attributes to make volume allocation more efficient
- Administering volumes
- Displaying volume information
- Monitoring and controlling tasks
- Reclamation of storage on thin reclamation arrays
- Stopping a volume
- Resizing a volume
- Adding a mirror to a volume
- Preparing a volume for DRL and instant snapshots
- Adding traditional DRL logging to a mirrored volume
- Enabling FastResync on a volume
- Performing online relayout
- Adding a RAID-5 log
- Creating and administering volume sets
- Configuring off-host processing
- Administering hot-relocation
- How hot-relocation works
- Moving relocated subdisks
- Administering cluster functionality (CVM)
- Overview of clustering
- Multiple host failover configurations
- CVM initialization and configuration
- Dirty region logging in cluster environments
- Administering VxVM in cluster environments
- Changing the CVM master manually
- Importing disk groups as shared
- Administering sites and remote mirrors
- About sites and remote mirrors
- Fire drill - testing the configuration
- Changing the site name
- Administering the Remote Mirror configuration
- Failure and recovery scenarios
- Performance monitoring and tuning
- Appendix A. Using Veritas Volume Manager commands
- Appendix B. Configuring Veritas Volume Manager
Enabling configuration database copies on tagged disks
In this example, the following commands have been used to tag some of the disks in an Hitachi TagmaStore array:
# vxdisk settag TagmaStore-USP0_28 t1=v1 # vxdisk settag TagmaStore-USP0_28 t2=v2 # vxdisk settag TagmaStore-USP0_24 t2=v2 # vxdisk settag TagmaStore-USP0_25 t1=v1
These tags can be viewed by using the vxdisk listtag command:
# vxdisk listtag DEVICE NAME VALUE TagmaStore-USP0_24 t2 v2 TagmaStore-USP0_25 t1 v1 TagmaStore-USP0_28 t1 v1 TagmaStore-USP0_28 t2 v2
The following command ensures that configuration database copies and kernel log copies are maintained for all disks in the disk group mydg that are tagged as t1:
# vxdg -g mydg set tagmeta=on tag=t1 nconfig=all nlog=all
The disks for which such metadata is maintained can be seen by using this command:
# vxdisk -o alldgs list DEVICE TYPE DISK GROUP STATUS TagmaStore-USP0_10 auto:cdsdisk - - online TagmaStore-USP0_24 auto:cdsdisk mydg02 mydg online TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online tagmeta TagmaStore-USP0_26 auto:cdsdisk - - online TagmaStore-USP0_27 auto:cdsdisk - - online TagmaStore-USP0_28 auto:cdsdisk mydg01 mydg online tagmeta
Alternatively, the following command can be used to ensure that a copy of the metadata is kept with a disk:
# vxdisk set TagmaStore-USP0_25 keepmeta=always # vxdisk -o alldgs list DEVICE TYPE DISK GROUP STATUS TagmaStore-USP0_10 auto:cdsdisk - - online TagmaStore-USP0_22 auto:cdsdisk - - online TagmaStore-USP0_23 auto:cdsdisk - - online TagmaStore-USP0_24 auto:cdsdisk mydg02 mydg online TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online keepmeta TagmaStore-USP0_28 auto:cdsdisk mydg01 mydg online