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Introduction to Disk Space Management and LVM
- Disk space management solutions
- Whole disk benefits and limitations
- LVM benefits and limitations
- LVM resources
- Disk space management solution comparison
- Disk space management solution coexistence
- VxVM benefits and limitations
Disk array & SAN concepts and addressing
- Disk array concepts
- LUN concepts
- RAID concepts
- RAID 0, RAID 1, RAID 1+0, and RAID 0+1 concepts
- RAID 3, RAID 5, and RAID 5DP concepts
- RAID levels and LVM
- SAN and multipathing concepts
- Hardware address concepts
- Legacy vs. Agile View hardware addresses
- Legacy parallel SCSI hardware addresses
- Legacy FC hardware addresses
- Legacy DSF names
- Viewing legacy hardware addresses and DSFs
- Agile View SCSI hardware addresses
- Agile View FC lunpath hardware addresses
- Agile View FC LUN hardware addresses
- Agile View persistent DSFs
- Viewing Agile View hardware addresses and DSFs
- Viewing an HBA's lunpaths via Agile View
- Viewing a LUN’s WWID and LUN ID via Agile View
- Viewing a LUN’s WWID and lunpaths via Agile View
- Selecting a path load balancing policy
- Monitoring HBA, LUN, and lunpath usage
- Monitoring HB, LUN, and lunpath health
- Enabling and disabling LUNs and lunpaths
LVM concepts and structures
- LVM objects
- LVM physical volumes, volume groups, and logical volumes
- LVM DSF directories and DSFs
- LVM extents and extent sizes
- LVM extent allocation
- LVM PVRA, VGRA, and BBRA areas
- LVM kernel structures and volume group activation
- LVM activation quorum
- LVM running quorum
- LVMv1.0, v2.0 and v2.1 limits
- LVMv2 and v2.1 limitations
Creating and Managing Volume Groups and Logical Volumes
- Identifying available disks
- Creating physical volumes and setting physical volume options
- Creating volume groups and setting volume group options
- Creating logical volumes and setting logical volume options
- Viewing volume groups, physical volumes, and logical volumes
- Extending, reducing, and removing volume groups
- Extending, reducing, and removing logical volumes
- Extending and reducing file systems
- Removing physical volumes
- Activating and deactivating volume groups
- LVM basic command summary
Configuring and Managing Mirrored Logical Volumes
- Mirroring concepts
- Installing MirrorDisk/UX
- Mirroring logical volumes
- Viewing logical volumes
- Unmirroring logical volumes
- Synchronizing mirrors
- Splitting and merging mirrors for on-host and off-host backups
- Configuring spare physical volumes
Configuring and managing mirroring policies
- Mirroring policy concepts
- Mirror scheduling policy concepts
- Choosing and configuring an appropriate mirror scheduling policy
- Mirror consistency recovery policy concepts
- Choosing and configuring an appropriate consistency recovery policy
- Mirror allocation policy concepts
- Choosing and configuring an appropriate mirror allocation policy
- Mirroring policy summary
Creating and Managing Striped and Distributed Logical Volumes
- Striped logical volumes
- Striped logical volume advantages and disadvantages
- Configuring non-mirrored striped logical volumes
- Striped versus distributed logical volumes
- Creating a non-mirrored distributed logical volume
- Creating a mirrored distributed logical volume
- Configuring /etc/lvmpvg for distributed logical volumes
Moving Data in an LVM Environment
- Moving extents within a volume group
- Moving logical volumes between volume groups
- Moving volume groups and physical volumes
- Structures affected by physical volume and volume group moves
- Renaming a volume group and logical volume
- Importing volume groups after reinstalling
- Importing split mirrors for off-host processing
- Exporting a corrupted volume group
- Importing volume groups in Serviceguard clusters
- Moving a volume group to another host
- Moving a physical volume to a new address
- Moving logical volumes between volume groups
Monitoring and Tuning LVM Performance
- LVM performance considerations
- Balancing workloads: concepts and symptoms
- Balancing workloads: overriding the default allocation policy
- Balancing workloads: striping logical volumes
- Balancing workloads: mirroring logical volumes
- Minimizing head movement: concepts, symptoms, and commands
- Avoiding fragmentation: concepts, symptoms, and commands
- Minimizing MWC/MCR overhead: concepts, symptoms, and commands
- Buying faster disks and interfaces
- Updating the Operating System
- Other performance factors
Recovering LVM Disks and Structures
- LVM structure concepts
- Recovering lost or damaged LVM structures
- Recovering missing device files
- Rebuilding a corrupt /etc/lvmtab file
- Refreshing outdated kernel structures
- Failed disks: symptoms experienced by users
- Failed disks: symptoms reported in syslog.log
- Failed disks: symptoms reported by EMS
- Failed disks: symptoms reported in vgdisplay
- Failed disks: symptoms reported in ioscan
- Activating a volume group containing failed disks
- Gathering information about failed disks
- Restoring a power-failed disk
- Replacing a failed disk
- Replacing a failed disk: Replacing a disk with and without LVM OLR
- Replacing a failed disk: Restoring LVM headers
- Replacing a failed disk: Restoring unmirrored logical volumes
- Replacing a failed disk: Restoring mirrored logical volumes
- Removing failed physical volumes
- Removing corrupted volume groups
- Proactively checking PVRA/VGRA health
- Preparing for disk recovery
Managing volume group attributes
- LVMv1 attribute concepts & limits
- LVMv2 attribute concepts & limits
- Managing LVMv1 attributes with vgmodify
- Managing LVMv2 attributes with vgmodify
- Expanding & contracting LUNs offline with vgmodify
- Expanding & contracting LUNs online with vgmodify
- Upgrading and downgrading volume grousp with vgversion
Configuring and Managing LVM Boot Disks on PA-RISC Servers (SELF STUDY)
- PA-RISC boot process structures, concepts, and restrictions
- Booting without LVM quorum
- Booting to LVM maintenance mode
- PA-RISC boot disk mirroring concepts
- Mirroring an Integrity boot disk
- Replacing a failed Integrity boot mirror
- Creating and updating a DRD clone
- Creating a PA-RISC make_*_recovery archive
- Resizing PA-RISC boot disk logical volumes
Configuring and Managing LVM Boot Disks on Integrity Servers
- Integrity boot process structures, concepts, and restrictions
- Booting without LVM quorum
- Booting to LVM maintenance mode
- Integrity boot disk mirroring concepts
- Mirroring an Integrity boot disk
- Replacing a failed Integrity boot mirror
- Creating and updating a DRD clone
- Creating an Integrity make_*_recovery archive
- Resizing Integrity boot disk logical volumes
Self study appendix: Configuring and managing PV links
- PV link overview
- Configuring PV links
- Viewing, adding, and removing PV links
- PV link switchover
- PV link switchback
- Configuring autoswitch behavior
- Switching links manually
- Optimizing PV links
- Configuring PV links with SecurePath
Self study appendix: Quiescing volume groups for use in snapshot LUNs
- Snapshot concepts
- Creating a snapshot
- Recognizing a snapshot
- Resolving duplicate VGIDs
- Importing a snapshot volume group
- Exporting a snapshot volume group
Self study appendix: Creating and managing DRD clones
- DRD concepts
- Using DRD clones to minimize planned and unplanned downtime
- Installing DRD
- Using the DRD command
- Creating and updating a DRD clone
- Verifying a DRD clone’s status
- Managing software via DRD-safe commands
- Managing kernel tunables via DRD safe commands
- Accessing images via other commands
- Activating an inactive DRD image
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