Pair status definitions

Both Device Manager - Storage Navigator and RAID Manager pair status names appear in the Status column, except when the names are the same. When they are the same, the RAID Manager status does not appear.

The following table shows both types of status names and their descriptions. In some cases, a particular status has no exact parallel status in the other interface. This is noted.

When checking the pair status, click Refresh to display the latest information. The P-VOL access and S-VOL access columns in the following table indicate whether the volumes accept read/write.

HDvM - SN status

RAID Manager status

Description

P-VOL access

S-VOL access

Unpaired in HDvM - SN

SMPL

This volume is not currently assigned to a TrueCopy pair.

Read/Write

Read/Write

COPY*

COPY

The initial copy operation for this pair is in progress. This pair is not yet synchronized.

Read/Write

Read Only

PAIR

PAIR

  • The pair is synchronized
  • Updates from the host to the P-VOL are duplicated in the S-VOL.

Read/Write

Read Only

PSUS

(pair suspended-split)

SSUS, PSUS

  • The pair was split by a user or deleted from the secondary system.
  • The pair is not synchronized.
  • When you split the pair in the primary system, that system changes the status of the P-VOL and S-VOL to this status.
  • In this status, updates to the S-VOL stop. The storage system keeps track of updates to the P-VOL in order to update the S-VOL when the pair is resynchronized.

    RAID Manager also shows the P-VOL in this status.

  • When you split the pair in the secondary system, that system changes the status of the S-VOL to this status. The primary system detects this and changes the P-VOL to this status.

    RAID Manager shows the S-VOL status as SSUS.

  • When you release the pair in the secondary system, that system changes the S-VOL status to SMPL . The primary system detects this and changes the P-VOL to this status. The pair must be released from the primary system in order to change P-VOL status to SMPL.
  • RAID Manager PSUS status indicates that although the paired status is retained, the user split the pair. This status is only for the P-VOL. While the pair is split, the storage system keeps track of updates to the P-VOL in the differential bitmaps.

Read/Write

Read only if Secondary Volume Write option is disabled.

Read/Write if Secondary Volume Write option is enabled.

PSUE

(pair suspended-error)

PSUE

  • The primary or secondary system splits the pair due to an error.
  • If the primary system cannot keep the pair synchronized for any reason, it changes the status of the P-VOL and S-VOL (if possible) to this status.
  • The pair is not synchronized.
  • RAID Manager PSUE indicates that although the paired status is retained, updates to the S-VOL is sopped due to an error status. RAID Manager PSUE is PSUS (SSUS) caused by an internal error.
  • A user deleted the pair from the secondary system.
  • An error occurred in the secondary system or the secondary volume, or during an update copy of TrueCopy.
  • Communication with the secondary system was disabled.

Read/Write.

Read only if Primary Volume Fence Level is Data.

Read Only

- SSWS
  • RAID Manager SSWS status indicates that the pair status is retained. The P-VOL and the S-VOL of the pair is switched and then they are resynchronized (horctakeover).

* When the 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, wait until the pair status changes to PAIR, or split the TC pair, and then resynchronize when the cache or shared memory operation is completed.

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