HP XP P9500 Storage - Manual (Page 65)

S-VOL access P-VOL access Description RAID Manager
status RWC status
Read/Write Read/Write A horctakeover and resync are in progress. SSWS (No parallel
RWC status)
1
When pair status is COPY, neither cache nor shared memory can be added to or removed from the storage system. When
either of these tasks is to be performed, first split any pairs in COPY, status, then resynchronize when the cache or shared memory
operation is completed.
Split and Suspend types
This topic 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 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 suspended by the primary system only, for any of the following reasons:
You 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 in the Detailed Information dialog box. The following table describes the PSUS
types.)
Description Volume applies
to PSUS type
The user splitsuspended 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-VOL P-VOL by operator
The user splitsuspended 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
The secondary system received a request from the primary system to suspend
the pair. The P-VOL splitsuspend type is Split-P-VOL by Operator or Split-S-VOL
by Operator. S-VOL by MCU
The primary system detected that the S-VOL status changed to SMPL because
you released the pair from the secondary system. The pair cannot be
resynchronized because the S-VOL does not have the PSUE/PSUS status. P-VOL Release pair to RCU
The primary system detected an error condition at the secondary system
(RCU), that caused the primary system to suspend the pair. The S-VOL split
type is S-VOL Failure by MCU. P-VOL
S-VOL
by RCU
The primary system detected an error during communication with the
secondary system, or an error during update copy. In this case, the S-VOL P-VOL
S-VOL
S-VOL failure
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.
The primary system could not find valid control information in its nonvolatile
memory during IMPL. This condition occurs only if the primary system is P-VOL
S-VOL
MCU IMPL
Monitoring pair status 65