HP StorageWorks XP Remote Web Console Software - Manual (Page 31)

Continuous Access XP Journal user guide 31
• Split all pairs in a journal group. See ” Splitting mirrors (Pairsplit-r: suspending copy operations) ”
on page 111 for a description of the Suspend Range-Group pairsplit option.
• Resume all suspended pairs in a journal group. See ” Restoring mirrors (Pairresync: resuming copy
operations) ” on page 112 for a description of the Resume Range-Group pairresync option.
• Delete all pairs in a journal group. See ” Deleting data volumes from mirrors (Pairsplit-S: ending
copy operations) ” on page 113 for a description of the Delete Range-Group pairdelete option.
• Group operations at the secondary array
• Split (pairsplit-r) all pairs in a journal group. See ”
Splitting mirrors (Pairsplit-r: suspending copy
operations) ” on page 111 for a description of the Suspend Range-Group pairsplit-r option.
• Delete (pairsplit-S) all pairs in a journal group regardless of their consistency status. See ” Deleting
data volumes from mirrors (Pairsplit-S: ending copy operations) ” on page 113 for a description of
the Delete Range-Group pairsplit-S option.
Continuous Access XP Journal data volume pair status
Continuous Access XP Journal displays the pair status for each data volume of a specified CU Image (CUI)
in the connected local array. Table 4 describes the Continuous Access XP Journal data volume pair
statuses. The primary array maintains the primary data volume’s status and can change the pair status of
the primary and secondary data volumes. The secondary array maintains the secondary data volume’s
status and can change the pair status of the primary and secondary data volumes, but not the primary
data volume. The primary array detects when the secondary array changes the secondary data volume’s
status (if the path status is normal) and changes the primary data volume’s status accordingly. You can
display detailed pair status information using Command View XP or XP Remote Web Console (Continuous
Access XP Journal Pairdisplay pane) or a UNIX/PC host (RAID Manager XP Pairdisplay command).
A volume that is not assigned to a Continuous Access XP Journal data volume pair has the status SMPL.
When a Continuous Access XP Journal data volume pair is started, the primary array changes the status
of the primary and secondary data volumes to COPY. When the initial copy operation is complete, the
primary array changes the status of both data volumes to PAIR. When a pair is suspended due to an error
condition, the primary array changes the status of the primary and secondary data volumes to PSUE (if the
path status is normal). When splitting a Continuous Access XP Journal pair (pairsplit-r), the primary or
secondary array changes the status of the primary and secondary data volumes to PSUS (if the path status
is normal). When a pair is split from the secondary array, the secondary array changes the secondary
data volume’s status to PSUS, and the primary array detects the pair deletion (if path status is normal) and
changes the primary data volume’s status to PSUS. When a pair is deleted from the primary array, the
primary array changes the status of both data volumes to SMPL. When a pair is deleted from the
secondary array, the secondary array changes the secondary data volume’s status to SMPL, and the
primary array detects the pair deletion (if path status is normal) and changes the primary data volume’s
status to PSUS.
When a Continuous Access XP Journal data volume pair is split or suspended, the primary array
generates a service information message (SIM) to notify the hosts. If SNMP is installed and operational for
Command View XP or XP Remote Web Console, this SIM results in an SNMP trap indicating the reason
for the suspension.
• Continuous Access XP Journal pair status
The Continuous Access XP Journal Suspending and Deleting transitional states occur when a request to
change the Continuous Access XP Journal pair status is accepted, but the requested status change
(PSUS, PSUE, or SMPL) is not complete yet. These states are not reported to the host. For Suspending,
either you or the primary array can request the status change. For Deleting, only you can request the
status change. If you requested the status change, the final status is reported at the end of the
transition. If an error caused the status to change to PSUE, the suspended status is reported at the
beginning of the transition.
After an array receives a request to split or delete a pair in Flush mode, the status of the pair remains
in the Suspending or Deleting state until the journal in the master journal group is restored in the
restore journal group and the pair is completely split or deleted. To calculate the time during which the
pair remains in the Suspending or Deleting state, use the following equation:
C × (u ч 100) Ч 1,024 ч V
where: