DECram for OpenVMS
User's Manual

A
Allocating space #1
Allocating space #2
local disk
shared disk
Applications
identifying commonly used images
locating files
on workstations
restrictions
using DECram disk
C
Comparison of a DECram disk
to disk caches
Configuration
allocating memory
creating
a DECram device
deallocating memory
determining device resources
INITIALIZE command
mounting
mounting a shadowed DECram disk
system resources
Configuring DECram disks
Version 2.3
Version 3.0 and higher
Controller failure
effects of
Creating
a DECram device
Creating and formatting RAM disks
INITIALIZE command
D
Deallocating space
local disk
shared disk
DECRAM command
command interface
DECram disk
allocating space for
characteristics
comparison to conventional disk
comparison to disk caches
configuration
allocating memory
creating a DECram device
deallocating memory
determining device resources
system resources
configuring
deallocating space
description
disk size limitation
following a dismount
initialize
failure recovery
MDDRIVER
mounting #1
mounting #2
following a dismount
MSCP served
Multiple DECram disks
recommended use of
on workstations
SYS$SCRATCH files
restrictions
shadowing
DECram disk volume-label
DECram startup procedures
DECram volume shadow reads and writes
Disk space limit
F
Failure characteristics
Failure recovery
INITIALIZE command
File lookups
Free page list
effect of reduced size
I
I/O database
creation of
I/O operations
delays in applications
INITIALIZE command
failure recovery
Install utility (INSTALL)
LIST command
L
Limitations of DECram disk
I/O delays in applications
paging and swapping behavior
redefining system logical names
LIST command
Install Utility
Locating files
Logical names
redefining system
M
MDDRIVER
Memory
allocating
deallocating
determining device resources
effect of reduced available
system resources
MOUNT verification process
Mounting a DECram disk
following a dismount
local #1
local #2
shared #1
shared #2
Mounting a shadowed DECram disk
Mounting a shared DECram disk
MSCP serving a DECram disk
O
OpenVMS cluster configurations
serving a DECram disk
shadowing a DECram disk
P
Paging and swapping behavior
Privileges required
R
Read/write disk
restriction on use
Recovering lost files
Recovery files
DECRAM$RECOVER.DAT
MDRECOVER.DAT
Redefining system logical names
Restoring a DECram disk
after a power failure
after a system crash
Restoring a disk
Restrictions #1
Restrictions #2
RMS AI Journaling
using to recover DECram files
S
Search list #1
Search list #2
Search order
Served DECram disks
failure characteristics
Shadow Set
number of members
Shadowed DECram disks
clusters
configuration
dismounting
mounting #1
mounting #2
Shadowing a DECram disk
Shadowing to a physical disk
SHOW DEVICE command
SHOW DISK command
deleting .DAT files
displaying disk information
/SIZE qualifier
Startup files
SYS$SCRATCH files
storing on a DECram disk
improving system performance
SYSGEN parameters
increasing when creating DECram disks
SYSMAN command
command interface
System idle time
System parameters
FREEGOAL
FREELIM
GBLPAGES
GBLSECTIONS
GROWLIM
requiring modification
System resources
determining
memory
System Page Table Entries (SPTEs)
U
Using a DECram disk
W
Workstations
using DECram disk with
diskless workstations