Pair status (ShadowImage)

REST API Reference Guide for Virtual Storage Platform 5000, Virtual Storage Platform E Series, and Virtual Storage Platform G/F Series

Version
93-07-0x
90-09-0x
88-08-10
Audience
anonymous
Part Number
MK-98RD9014-17
The following explains the operations and status transitions for pairs.

Pair status

Description

Access to the P-VOL

Access to the S-VOL

SMPL

Unpaired volumes

-

-

COPY

The pair is being created.

An initial copy or resynchronization is being performed.

R/W enabled

R enabled

PAIR

Paired volumes

The initial copy is complete. The update data of the P-VOL will be asynchronously copied to the S-VOL.

R/W enabled

R enabled

PSUS

The pair is being split by operation. (This value is output for the P-VOL.)

R/W enabled

R/W enabled

SSUS

The pair is being split by operation. (This value is output for the S-VOL when the P-VOL is PSUS.)

R/W enabled

R/W enabled

PSUE

The pairing is suspended due to a failure.

The P-VOL and the S-VOL are not synchronized.

R/W enabled

R enabled

RCPY

A restore operation is being performed. (Data is being copied from the S-VOL to the P-VOL.)

Not enabled

R enabled

If you delete a pair, the pair status changes to SMPL.

Note:

In the following cases, if you perform an operation on a pair, the request successfully returns a response, but the details specified in the request body are not actually applied:

  • When you perform a pair splitting operation on a pair for which the status is PSUS or SSUS
  • When you perform a pair resynchronization operation on a pair for which the status is COPY, PAIR, or RCPY