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HP OpenVMS Systems Documentation

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Volume Shadowing for OpenVMS

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A B C D E F G H I L M N O P Q R S T U V W

A
/ABORT_VIRTUAL_UNIT qualifier
Addressing data
    recovery from errors
ALLOCATE command
Allocation classes
    naming format
    nonzero
ALLOCLASS parameter #1
ALLOCLASS parameter #2
Assisted copy operations
    See Copy operations
ATM
AUTOGEN utility
    using with MODPARAMS.DAT file
Availability
    achieved by shadow set configurations
    levels
    of data
    performance impacts
    recovery from failures
    with write I/O requests
B
Backup operations
    data consistency requirements
    database systems
    guidelines for using shadow set member
    host-based RAID
    mapped files
    multiple shadow sets
    OpenVMS Cluster operations
    OpenVMS file system
    restoring data
    revalidation of data consistency methods
    RMS considerations
    shadow copy as
    testing
    using Backup utility
    virtual cache
    XFC
Backup utility (BACKUP)
    /IMAGE qualifier
    revision number
    standalone
        restrictions
Booting
    satellite boot devices
    satellite nodes
    system disk shadow set
C
CI (computer interconnect)
    and MSCP server access to shadow sets
    preventing resource saturation
    utilized for copy operations
/CLUSTER qualifier
    mounting a shadow set clusterwide
Cluster systems
    MSCP server access to shadow sets
CLUSTER_CONFIG.COM command procedure
    setting shadowing parameters
CLUSTER_CONFIG_LAN.COM command procedure
    setting shadowing parameters
Compatibility
    shadow set members
Computer interconnect
    See CI
Configuration of a shadow set
    cluster with multiple HSJs and star couplers
    effect on availability
    examples
    high-availability local area cluster
    maximum shadow sets
    one system with one adapter
    one system with two host-based adapters
    OpenVMS Cluster with dual adapters
Consistency
    data
    ensuring during failures
    when adding shadow set members
Controller errors
    recovery from
Controllers
    performing DCD commands
    setting preferred path
    supporting performance assists
    using performance assists
    write log entries
Copy assists
    See Copy operations
Copy operations
    adding a member
    after a system failure
    assisted
        controllers supporting
        disabling on HSC controller #1
        disabling on HSC controller #2
        overview
        performance
        setting preferred path
    BACKUP revision number
    comparison with minicopy
    controlling with the SHADOW_MAX_COPY parameter
    example
    multiple simultaneous
    no copy
    performance of minicopy versus DCD copy
    proper dismount
    purpose
    recovery from system failures
    transitions in shadow set membership
    unassisted
    volume label
    volume shadowing generation number
    with merge operation
/COPY qualifier
Copy threads
    controlling dynamically
    controlling with the SHADOW_MAX_COPY parameter
    referred to in status messages
/COPY_SOURCE qualifier
Crash dumps
    shadowed system disk and minicopy
    written to system disk shadow set
D
Data
    changing on individual members
Data availability
    See Availability
Data consistency
    when adding shadow set members
Data errors
    recovery from
DCD (disk copy data) commands
DECnet databases
    example of a satellite node
Devices
    allocating
    DECram served device
    recovery from controller errors
    recovery from data errors
    recovery from errors
    recovery from failures
    recovery from unit or drive errors
    SCSI support
    supported
    unsupported
Digital Storage Architecture
    See DSA
Digital Storage Systems Interconnect
    See DSSI
Disaster tolerant OpenVMS Cluster systems
    See OpenVMS Cluster systems
Disk mirroring
Disk volumes
    initializing
Disks
    compatibility to form a shadow set
    in Files-11 structure
    initializing
    SCSI support
DISMOUNT command
    creating a write bitmap
    /POLICY qualifier
    removing a shadow set member
    required privileges
DISMOUNT/FORCE_REMOVAL command
Dismounting a shadow set
    overview
    with SYS$DISMOU system service
Dismounting a shadow set member
Displaying shadow set information
Dissolving a shadow set
    with SYS$DISMOU system service
Distributing members of shadow sets
Distributing shadow sets
DOSD (dump off system disk) #1
DOSD (dump off system disk) #2
    use of DUMPSTYLE
Drive errors
    recovery from
DSA (Digital Storage Architecture)
    naming the virtual unit
    support for compliant hardware
DSSI (Digital Storage Systems Interconnect)
    and MSCP server access to shadow sets
DUMPSTYLE system parameter
E
Error messages
    mount verification
    OPCOM
    shadow server
    system service
    VOLPROC
Errors
    recovery from
Ethernet
    and MSCP server access to shadow sets
    Gigabit Ethernet usage
    preventing resource saturation
    utilized for copy operations


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