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Volume Shadowing for OpenVMS

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P

PAKs (Product Authorization Keys)
- registering
Parameters
- displaying current SYSGEN values
- See System parameters
- SHADOWING
- SHADOW_MAX_COPY
- SHADOW_MBR_TMO
- SHADOW_SYS_UNIT
- specific to shadowing
- system
Performance
Performance assists
- copy operation
- merge operation
Phase I volume shadowing
Phase II volume shadowing
Preferred path
- setting for controllers
Privileges
Product Authorization Keys
- See PAKs

Q

Quorum disk

R

RAID
- levels
RAID (redundant arrays of inexpensive disks)
Read requests
- performance
Recoveries
Redundant arrays of inexpensive disks
- See RAID
RZ57 disk drive
- microcode and revision requirement

S

Satellite nodes
- booting shadowed
- DECnet database example
- distributing shadow set members across
- LANCP database example
SCB (storage control block)
- BACKUP revision number
- information
- proper dismount
- read at boot time
- volume label
- volume shadowing generation number
SCSI (Digital Small Computer Systems Interface)
- devices that cannot be shadowed
- hardware compliance
- support for compliant hardware
- third-party compliance
SCSI (Small Computer Systems Interface)
- support for compliant hardware
SDA (System Dump Analyzer)
- checking SCSI compliance
- dumping to a shadowed disk
- examining a shadow set
- example
Servers
- MSCP
- shadow server messages
/SHADOW qualifier
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
- 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 #1
- distributing #2
- examining
  - with DCL command SHOW DEVICES
  - with F$GETDVI lexical function
  - with SDA
- initializing members
- maximum number #1
- maximum number #2
- merge operations
- merge throttle
- migrating to phase II #1
- migrating to phase II #2
- modifying individual members
- mounting
  - a volume set #1
  - a volume set #2
  - with SYS$MOUNT system service #1
  - with SYS$MOUNT system service #2
- overview
- quorum disk
- removing a member
- removing member units
  - with SYS$DISMOU system service
- satellite node
- standalone BACKUP
- state changes
- steady-state performance
- system disk
  - upgrading
- transferring changes to members
SHADOWING parameter
SHADOW_MAX_COPY
- guidelines for setting
SHADOW_MAX_COPY parameter
SHADOW_MBR_TMO parameter
SHADOW_SYS_DISK parameter
SHADOW_SYS_TMO parameter
SHADOW_SYS_UNIT parameter
SHADOW_SYS_WAIT parameter
SHOW DEVICES command
- 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
Small Computer Systems Interface
- See SCSI
Standalone BACKUP
Status messages
- mount verification
- OPCOM
- shadow server #1
- shadow server #2
- VOLPROC
Steady state
- actions during system failure
- definition
- performance
Storage control block
- See SCB
Stripe sets
- shadowed
Striping
- and performance
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
SYSGEN (System Generation utility)
- See System parameters
SYSNAM privileges
- 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
- SHADOW_SYS_DISK parameter
- SHADOW_SYS_TMO parameter
- SHADOW_SYS_UNIT parameter
- SHADOW_SYS_WAIT parameter
System disks
- crash dumping to
- migrating to phase II shadowing
- shadowing across an OpenVMS Cluster system
- upgrading #1
- upgrading #2
System Dump Analyzer
- See SDA
System management
- booting a system disk shadow set
- on systems with volume shadowing
- setting up a shadowing environment
System parameters
- displaying current values
- migrating to phase II shadowing
- MVTIMEOUT parameter
- setting in the MODPARAMS.DAT file
- SHADOWING
- shadowing
- SHADOW_MAX_COPY
- SHADOW_MAX_COPY parameter
- SHADOW_MBR_TMO
- SHADOW_SYS_DISK
- SHADOW_SYS_TMO
- SHADOW_SYS_UNIT
- SHADOW_SYS_WAIT
/SYSTEM qualifier
- mounting shadow sets for systemwide access
System services
- performing shadow set operations

T

Timeouts
- disk recovery
Transient state
- definition
- performance
Transitions

U

UICs (user identification codes)
- for mounting disks
Unassisted merge operations
Unit errors
- recovery from
Upgrades
- operating system
User identification codes
- See UICs

V

Virtual units
VMB (primary bootstrap)
- setting R3 for phase II volume shadowing
VOLPRO privileges
- required for MOUNT command
VOLPROC command
- messages
Volume labels
- copy operation
- differences among shadow set members
Volume sets
Volume shadowing
Volume shadowing generation number
- used for copy operation
Volumes
- compatibility with disks

W

WHEs (write log entries)
- availability
- for minimerge operation
Write log entries
- See WHEs
Write protection
- hardware
Write requests
- performance

Master Alphabetic Index

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

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  5423PI01.HTM
  OSSG Documentation
  22-NOV-1996 13:03:51.07

Copyright © Digital Equipment Corporation 1996. All Rights Reserved.