Updated: 11 December 1998

Volume Shadowing for OpenVMS

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
as system disk shadow set
clusterwide #1
clusterwide #2
definition
distributed
VMB (primary bootstrap)
setting R3 for phase II volume shadowing
VOLPRO privilege
required for MOUNT command
VOLPROC command
messages
Volume labels
copy operation
differences among shadow set members
Volume sets
constructing
mounting #1
mounting #2
mounting #3
with MNT$_SHANAM
shadowed
virtual unit item descriptor
Volume shadowing
capacity license #1
capacity license #2
compatibility between phase I and II
concepts
copy assist performance
definition
disabling
disabling copy assists
enabling
license registration for
migrating from phase I to phase II
minimerge performance
overview
per disk license #1
per disk license #2
phase II
processing messages
providing high data availability
recovery from device failures
recovery strategies after a system failure
shadow server messages
shadow set configurations
system parameters
virtual units
VOLPROC messages
Volume shadowing generation number
used for copy operation
Volumes
compatibility with disks
W
Write history entries (WHEs)
for minimerge operations
Write log entries
effect on minimerge operations
Write protection
hardware
Write requests
performance

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