HP P9000 Continuous Access Synchronous User Guide (AV400-96400, October 2011)

Split and suspend types
This section discusses pairs that are split by the user (PSUS), and pairs that are suspended by the
system (PSUE).
• You can split a pair when the initial copy operation is complete.
You must split a pair must be to perform media maintenance on the P-VOL or to access
the S-VOL (when S-VOL write is enabled).
◦
◦ When you split a pair, the primary system ensures synchronization by completing any
pending update copy operation before changing the status to PSUS.
• Pairs are split by the primary system only, for any of the following reasons:
The user released the pair from the secondary system.◦
◦ An error condition related to the secondary system, the S-VOL, or an update-copy
operation.
◦ The primary system cannot communicate with the secondary system.
PSUS types appear on the Detailed Information dialog box. The following lists the PSUS types and
descriptions.
Table 24 PSUS types
RAID
Manager
indication
Remote Web
Console
indication
DescriptionApplies
to
Types
PSUSPSUSThe user split the pair from the primary system using the P-VOL
Failure in the Suspend Type option in the Suspend Kind field.
The S-VOL split type is, "by MCU".
P-VOLP-VOL by
Operator
PSUS or
SSWS
PSUSThe user split the pair from the primary or secondary system
using the S-VOL in the Suspend Type option in the Suspend
Kind field.
P-VOL
S-VOL
S-VOL by
Operator
SSUSPSUSThe secondary system received a request from the primary
system to split the pair. The P-VOL split type is Split-P-VOL by
Operator or Split-S-VOL by Operator.
S-VOLby MCU
PSUSPSUSThe primary system detected that the S-VOL status changed
to SMPL because the user released the pair from the
P-VOLRelease pair
to RCU
secondary system. The pair cannot be resynchronized
because the S-VOL does not have the PSUE/PSUS status.
PSUEPSUSThe primary system detected an error condition at the
secondary system (RCU), that caused the primary system to
P-VOL
S-VOL
by RCU
suspend the pair. The S-VOL suspend type is S-VOL Failure
by MCU.
PSUEPSUEThe primary system detected an error during communication
with the secondary system, or an error during update copy.
P-VOL
S-VOL
S-VOL Failure
In this case, the S-VOL suspend type is usually S-VOL Failure.
This suspend type is also used when the number of paths falls
below the minimum number of paths setting on the RCU
Option dialog box.
PSUEPSUEThe primary system could not find valid control information
in its nonvolatile memory during IMPL. This condition occurs
P-VOL
S-VOL
MCU IMPL
only if the primary system is without power for more than 48
hours (i.e., power failure and fully discharged backup
batteries).
PSUEPSUEThe pair was suspended before the initial copy operation
was complete. The data on the S-VOL is not identical to the
data on the P-VOL.
P-VOL
S-VOL
Initial Copy
Failed
Monitor pair status 57