Updated: 11 December 1998

Volume Shadowing for OpenVMS

I
/INCLUDE qualifier
Initializing disk volumes
Installation
Installations
See License registration
Item codes
for creating and mounting a shadow set
for creating and mounting a volume set
to add to a shadow set
with SYS$GETDVI system service
with SYS$MOUNT system service
K
KDM70 controller
microcode version requirement #1
microcode version requirement #2
L
LANCP databases
example of a satellite node
License registrations
capacity #1
capacity #2
for volume shadowing
per disk #1
per disk #2
M
Mass storage control protocol
See MSCP
Member units
adding
backing up #1
backing up #2
crash dumping to system disk
initializing
mounting
on satellite nodes
requirement for nonzero allocation class
shadow set
Membership
adding a new disk
data consistency
during steady state
transitions during copy operations
transitions during merge operations
transitions during minimerge operations
Merge operations
after a system failure
automatic throttling of copy operations
controlling with the SHADOW_MAX_COPY parameter
example
multiple simultaneous
purpose
transitions in shadow set membership
Messages
displayed for unregistered nodes
mount verification
OPCOM
shadow server #1
shadow server #2
system service
VOLPROC
Migrating to phase II
Minimerge operations
actions during system failure
after a system failure
controllers supporting
disabling
disabling on HSC controller
overview
performance
write log entries
Mirroring
disks
MNT$_SHAMEM item code
MNT$_SHANAM item code
MODPARAMS.DAT file
editing in an OpenVMS Cluster
example
setting parameters in
MOUNT command
adding shadow set members
/CLUSTER qualifier #1
/CLUSTER qualifier #2
/CLUSTER qualifier #3
/COPY qualifier
format
/INCLUDE qualifier
/NOASSIST qualifier
/NOMOUNT_VERIFICATION qualifier
/OVERRIDE=IDENTIFICATION qualifier
/OVERRIDE=SHADOW_MEMBERSHIP qualifier
qualifiers #1
qualifiers #2
reconstructing shadow sets with /INCLUDE
required privileges #1
required privileges #2
shadowed volume sets
/SYSTEM qualifier
Mount utility
See MOUNT command
Mount verification
messages
Mounting
devices
shadow sets
virtual units
volume sets #1
volume sets #2
MSCP (mass storage control protocol)
DCD commands
server
serving a shadow set
supported devices
N
Naming conventions
for shadow set #1
for shadow set #2
NOFE (no forced error bit)
/NOMOUNT_VERIFICATION qualifier
O
OPCOM (Operator Communication Manager)
messages
OpenVMS Cluster systems
enhanced shadowing performance
interprocess communication
maximum number of shadow sets #1
maximum number of shadow sets #2
mounting shadow sets
mounting the virtual unit
providing high data availability
requirement for nonzero allocation class
shadowing across
updating system parameters for
OPER privilege
required for MOUNT command
Operating system versions
compatibility with phase I to phase II volume shadowing
Operating systems
upgrading on a shadowed system disk
/OVERRIDE=IDENTIFICATION qualifier
/OVERRIDE=SHADOW_MEMBERSHIP qualifier
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
assisted merge
automatic merge throttle
controlling copy operations with SHADOW_MAX_COPY
copy assists #1
copy assists #2
enabling and disabling
for read I/O requests
merge assists
minimerge
of a shadow set
steady state
transient state
write log entries
Performance assists
copy operation
merge operation
Phase I volume shadowing
compatibility with phase II
conversion to phase II
migrating to phase II #1
migrating to phase II #2
Phase II volume shadowing
compatibility with phase I
conversion from phase I #1
conversion from phase I #2
definition
features
Preferred path
setting for controllers
Privileges
OPER
SYSNAM #1
SYSNAM #2
VOLPRO
Product Authorization Keys
See PAKs
Q
Quorum disk
R
RAID (redundant arrays of independent disks)
levels
Read requests
performance
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
RZ57 disk drive
microcode and revision requirement

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