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Hitachi Command Control Interface (CCI) User and Reference Guide 187
4.5 Confirming Pair Operations (Pairevtwait)
The pair event waiting (pairevtwait) command is used to wait for completion of pair
creation and pair resynchronization and to check the status (see Figure 4.11). It waits
(“sleep
s”) until the paired volume status becomes identical to a specified status and then
completes. The pairevtwait command can be used for a paired logical volume or a group of
paired volumes. The primary volume’s server is automatically detected by the pair event
waiting command, so the server does not need to be specified in the pair event waiting
command parameters. Table 4.9 lists and describes the pair event waiting command
parameter
s and returned values. Table 4.10 lists and describes the error codes for the
paire
vtwait command.
The pair event waiting command waits until the specified status is established, and
terminates abnormally if an abnormal status is detected. The transition of the paired volume
status is judged by the status of the primary volume. If the event waiting command is issued
for a group, the command waits until the status of each volume in the group changes to the
specified status. When the event waiting command with the -nowait option is issued for a
group, the status is returned if the status of each volume in the group is identical. For
ShadowImage pairs, this command must be used to confirm a pair status transition.
Server A
Server B
Primary
volume
(Secondary
volume)
Secondary
volume
(Primary
volume)
Paired logical volume
Status Status
Event
waiting
Figure 4.11 Pair Event Waiting
Table 4.9 Pairevtwait Command Parameters
Parameter Value
Command Name pairevtwait
Format pairevtwait{ -h ⎪ -q ⎪ -z ⎪ -g <group> ⎪ -d <pair Vol> ⎪ -d[g] <raw_device> [MU#] ⎪ -FHORC [MU#] ⎪ -
FMRCF [MU#] ⎪ -d[g] <seq#> <LDEV#> [MU#] ⎪ -s [s] <status> ...⎪ -t <timeout>[intervall] ⎪ -nowait[s] ⎪ -l
⎪ -nomsg }