HP XP Continuous Access Software - Manual (Page 42)

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The journal data that reached the secondary storage system, but has not yet been restored.
After marking these primary data volume tracks as modified, the primary storage system
discards this journal data. Therefore, the secondary storage system can check and mark the
journal data that has not been restored.
The primary storage system does not discard journal data from the master journal volume until
the primary storage system receives the sequence numbers of the restored journal volumes.
The sequence numbers are included in the read journal commands from the secondary storage
system.
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The primary data volume records updated by host-requested write I/Os after the pair was
suspended. The XP Continuous Access Journal suspension conditions described in
Table 9 (page
42) indicate which CU detects the condition and which pairs are suspended. See “General
Troubleshooting” (page 218) for troubleshooting information for XP Continuous Access Journal
suspension conditions.
Table 9 XP Continuous Access Journal Suspension Condition
XP Continuous Access Journal Pairs to
be Suspended Detected by Suspension Condition
All XP Continuous Access Journal
secondary data volumes in the journal
groups, or the affected secondary
data volume RCU The secondary storage system could not copy the
journal data successfully due to a hardware failure or
logic error.
All XP Continuous Access Journal
secondary data volumes in the journal
group, or only the affected secondary
data volume RCU The secondary storage system detected a logical error
while selecting the journal data to be restored.
All XP Continuous Access Journal
secondary data volumes in the journal
groups, or the affected secondary
data volume RCU The secondary storage system could not restore the
journal data due to a hardware failure, track condition,
or logical error.
42 About XP Continuous Access Journal Operations