sizing, 22
journals, 50
changing options, 83
deleting;deleting a journal, 88
description, 11
monitoring;monitoring:journals, 78
planning, 23
specifications, 19
L
latency, 38
logical paths
additional, 47
deleting, 89
monitoring;monitoring:logical paths, 79
troubleshooting;troubleshooting:logical paths, 105
M
maintaining the system, 82
MCU, RCU, 10
measuring write-workload, 21
mirror ID explained, 11
mirrors
changing options, 85
splitting, 59
monitoring pair, 67
moving operations to S-VOL;S-VOL
taking over host operations, 93
multiple system, 29
N
network relay devices, powering off, 92
number of host links to target port, 44
number of pairs to create, 48
O
Other licenses, 17
P
packet loss, 38
pair delete, 63
Pair operations, 53
pair split option, changing, 82
pair status, 67
pair volumes
description, 11
planning considerations, 25
pairs
status monitoring, definitions, 67
troubleshooting;suspended pairs, 107
point-in-time copy, 59
ports
defining attributes, 43
planning, 39
power off, managing, 90
prerequisites for
2DC configuration, 145
3DC cascade configuration, 135
3DC multitarget configuration, 137
changing journal options, 83
changing mirror options, 85
changing pair split option, 82
defining port attributes, 43
deleting a journal, 88
deleting a journal volume, 87
deleting a pair, 63
deleting pairs from a mirror, 65
delta resync - create the pair, 139
delta resync - perform the operation, 60
delta resync operation, 139
performing the initial copy, 53
registering journals, 50
resyncing a mirror, 62
resyncing a pair, 60
splitting a mirror, 59
splitting a pair, 57
primary site recovery
resuming operations, 94
with 2DC configuration, 102
PSUE, 72
PSUS types, 71
R
RAID groups, planning, 24
RAID levels supported, 18
RCU target port, 39
related documentation, 126
remote command device
about, setup;delta resync:using remote command
devices with, 141
assigning mirrors, 142
remote I/O copy statistics, 77
required number of ports, 39
resuming a pair, synchronization, 71
resynchronizing a mirror, 62
resynchronizing a pair, 60
RIO MIH, 47
rolling averages and cycle time, 37
RPO
about, 21
determining, 21
S
S-VOL Write option, 57, 58
saving graph data;Usage Monitor
saving data, 78
service information message, 70
Service Information Messages, 123
set up ports, 40
setting up 2DC configuration, 146
setting up 3DC cascade, 136
setting up 3DC multitarget, 137
setting up delta resync;delta resync
creating the pair, 141
sharing secondary volumes, 149
sharing volumes, 147
SIMs, 123
sizing bandwidth, 35
192 Index
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