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HP OpenVMS Systems Documentation
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Volume Shadowing for OpenVMS

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Q
Quorum disk
R
RAID (redundant arrays of independent disks)
    levels
Read requests
    performance
/READ_COST qualifier
Recoveries
    from controller errors
    from data errors
    from device failure
    from system failures
    from unit or drive errors
    repair actions
    repairing data
Redundant arrays of independent disks
    See RAID
S
Satellite nodes
    booting shadowed
    DECnet database example
    distributing shadow set members across
    LANCP database example
SCBs (storage control blocks)
    BACKUP revision number
    proper dismount
    read at boot time
    volume label
    volume shadowing generation number
SCSI (Small Computer Systems Interface)
    disks that cannot be shadowed
    hardware compliance
    support for compliant hardware
    third-party compliance
SDA (System Dump Analyzer utility)
    See System Dump Analyzer utility
Servers
    MSCP
    shadow server messages
SET DEVICE command
    qualifiers
SHAD$MERGE_DELAY_FACTOR
SHAD$MERGE_DELAY_FACTOR_DSAnnnn
/SHADOW qualifier #1
/SHADOW qualifier #2
Shadow servers
    messages #1
    messages #2
Shadow set members
    inaccessibility because of failures
    modifying individual
    naming
    transferring changes
Shadow sets
    accessed through MSCP server
    adding members #1
    adding members #2
    additional members
    backing up
    clusterwide
    components
    configuration examples
    copy operations
    crash dumping to system disk #1
    crash dumping to system disk #2
    creating #1
    creating #2
        with SYS$MOUNT system service #1
        with SYS$MOUNT system service #2
    definition
    dismounting
        with SYS$DISMOU system service
    displaying information about
    dissolving
        with SYS$DISMOU system service
    distributing
    examining
        with DCL command SHOW DEVICE
        with F$GETDVI lexical function
        with SDA
    initializing members
    maximum number
    members
    merge operations
    merge throttle
    modifying individual members
    mounting
        a volume set
        with SYS$MOUNT system service #1
        with SYS$MOUNT system service #2
    overview
    quorum disk
    removing members
        with DISMOUNT command
        with SYS$DISMOU system service
    satellite node
    standalone BACKUP
    state changes
    steady-state performance
    system disk
        upgrading
    transferring changes to members
SHADOWING parameter #1
SHADOWING parameter #2
SHADOW_MAX_COPY parameter #1
SHADOW_MAX_COPY parameter #2
SHADOW_MAX_COPY parameter #3
    guidelines for setting
SHADOW_MAX_UNIT parameter #1
SHADOW_MAX_UNIT parameter #2
SHADOW_MBR_TMO parameter #1
SHADOW_MBR_TMO parameter #2
SHADOW_MBR_TMO parameter #3
SHADOW_SYS_DISK parameter #1
SHADOW_SYS_DISK parameter #2
SHADOW_SYS_TMO parameter #1
SHADOW_SYS_TMO parameter #2
SHADOW_SYS_UNIT parameter #1
SHADOW_SYS_UNIT parameter #2
SHADOW_SYS_WAIT parameter #1
SHADOW_SYS_WAIT parameter #2
SHOW CLUSTER command
    displaying write bitmap information
SHOW DEVICE command
    displaying write bitmap information
    during copy operation #1
    during copy operation #2
    during merge operation
    during steady state
    overview #1
    overview #2
    sample sequence
    shadow set member
    specifying the virtual unit
Single systems
    enhanced shadowing performance
/SITE qualifier
Standalone BACKUP
Status messages
    mount verification
    OPCOM
    shadow server #1
    shadow server #2
    VOLPROC
Steady state
    actions during system failure
    definition
    performance
Storage control blocks
    See SCBs
Stripe sets
    shadowed
Striping
    and performance
SYLOGICALS.COM startup file
    defining site location
SYS$DISMOU system service
    condition values returned by
    dismounting volumes with
SYS$GETDVI system service
    getting information about volumes with
SYS$MOUNT system service
    condition values returned by
    item codes
    mounting volumes #1
    mounting volumes #2
    shadow set item codes
    shadowed volume sets
SYSNAM privilege
    required for DISMOUNT command
    required for MOUNT command #1
    required for MOUNT command #2
System configurations #1
System configurations #2
    effect on performance
    setting up
System disk shadow sets
    booting from
    booting satellite nodes
    crash dumping to #1
    crash dumping to #2
    SHADOW_SYS_DISK parameter #1
    SHADOW_SYS_DISK parameter #2
    SHADOW_SYS_TMO parameter
    SHADOW_SYS_UNIT parameter
    SHADOW_SYS_WAIT parameter
System disks
    crash dumping to
    dump file restriction
    shadowing across an OpenVMS Cluster
    upgrading #1
    upgrading #2
System Dump Analyzer utility (SDA)
    checking SCSI compliance
    dumping to a shadowed disk
    dumping to a system disk shadow set
    examining a shadow set
    example
System management
    booting a system disk shadow set
    on systems with volume shadowing
    setting up a shadowing environment
System parameters
    ALLOCLASS #1
    ALLOCLASS #2
    displaying current SYSGEN values
    DUMPSTYLE #1
    DUMPSTYLE #2
    MVTIMEOUT parameter
    setting in the MODPARAMS.DAT file
    SHADOWING #1
    SHADOWING #2
    shadowing
    SHADOW_MAX_COPY #1
    SHADOW_MAX_COPY #2
    SHADOW_MAX_COPY #3
    SHADOW_MAX_COPY #4
    SHADOW_MAX_UNIT #1
    SHADOW_MAX_UNIT #2
    SHADOW_MBR_TMO #1
    SHADOW_MBR_TMO #2
    SHADOW_MBR_TMO #3
    SHADOW_SYS_DISK #1
    SHADOW_SYS_DISK #2
    SHADOW_SYS_DISK #3
    SHADOW_SYS_DISK #4
    SHADOW_SYS_TMO #1
    SHADOW_SYS_TMO #2
    SHADOW_SYS_UNIT #1
    SHADOW_SYS_UNIT #2
    SHADOW_SYS_WAIT #1
    SHADOW_SYS_WAIT #2
    write bitmap
/SYSTEM qualifier
    mounting shadow sets for systemwide access
System services
    performing shadow set operations

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